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1. Boosting bifunctional oxygen electrocatalysis of graphitic C₃N₄ using non-covalently functionalized non-oxidized graphene aerogels as catalyst supports

Author:
Jin Kim; Anand P. Tiwari; Myungwoo Choi; Qiang Chen; Jinho Lee; Travis G. Novak; Minsu Park; Kisun Kim; Ki-Seok An; Seokwoo Jeon
Source:
Journal of materials chemistry A 2022 v.10 no.29 pp. 15689-15697
ISSN:
2050-7496
Subject:
adsorbents; aerogels; carbon nitride; catalysts; catalytic activity; electron transfer; graphene; oxygen; polyvinylpyrrolidone
Abstract:
... The doping state of graphene can regulate electron donation and acceptance with the supported active material during electrocatalytic reactions. Effectively doping graphene is thus crucial for inducing ideal electron transfer for the desired reaction. Functionalization of graphene with non-covalent adsorbents can accurately modulate its electronic state by providing an ideal doping configuration w ...
DOI:
10.1039/d2ta02031a

2. Changes in the catalytic activity of oxygen-doped graphitic carbon nitride for the repeated degradation of oxytetracycline

Author:
Thanh Tuan Nguyen; Do Gun Kim; Seok Oh Ko
Source:
Chemosphere 2022 pp. 135870
ISSN:
0045-6535
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon nitride; catalysts; catalytic activity; crystal structure; electron paramagnetic resonance spectroscopy; graphene; oxytetracycline; pollutants
Abstract:
... Metal-free carbonaceous catalysts have gained growing interest because of their excellence in organic pollutant degradation. However, most of them suffer from deactivation after use, and the origins have not been investigated or understood. In this study, the changes in the characteristics after multiple uses of a carbonaceous catalyst, i.e., oxygen-doped graphitic carbon nitride (O-gCN), were inv ...
DOI:
10.1016/j.chemosphere.2022.135870

3. Efficient organics heterogeneous degradation by spinel CuFe2O4 supported porous carbon nitride catalyst: Multiple electron transfer pathways for reactive oxygen species generation

Author:
Ting Chen; Zhiliang Zhu; Yue Wang; Hua Zhang; Yanling Qiu; Daqiang Yin
Source:
Chemosphere 2022 v.300 pp. 134511
ISSN:
0045-6535
Subject:
adsorption; carbon nitride; catalysts; catalytic activity; electron paramagnetic resonance spectroscopy; electron transfer; mineralization; oxidation
Abstract:
... Facilitating reactive oxygen species (ROS) generation is an effective way to promote the heterogeneous catalytic efficiency for organics removal. However, the metal leaching in metal-based catalysts and the low activity of non-metallic materials restrict ROS production. In this work, the purpose was achieved by loading a small amount of spinel CuFe₂O₄ onto porous carbon nitride substrate. The synt ...
DOI:
10.1016/j.chemosphere.2022.134511

4. Enhanced Fenton-like process via interfacial electron donating of pollutants over in situ Cobalt-doped graphitic carbon nitride

Author:
Yumeng Wang; Qian Fang; Zhiju Xie; Chun Hu; Lai Lyu
Source:
Journal of colloid and interface science 2022 v.608 pp. 673-682
ISSN:
0021-9797
Subject:
aromatic compounds; carbon nitride; catalysts; catalytic activity; density functional theory; electron transfer; energy; graphene; hydrogen peroxide; reaction mechanisms
Abstract:
... The heterogeneous Fenton process suffers from low efficiency because of the low electron transfer cycle rate of Fe³⁺/Fe²⁺, which often consumes enormous amounts of hydrogen peroxide (H₂O₂) or other energy. Herein, we report a novel Co-based Fenton-like catalyst (in-situ-Co-g-C₃N₄) synthesized via the surface complexation method, in which Co species were modified in situ into the framework of the g ...
DOI:
10.1016/j.jcis.2021.09.126

5. Experimental and theoretical investigation for the cycloaddition of carbon dioxide to epoxides catalyzed by potassium and boron co-doped carbon nitride

Author:
Xin Wang; Li Yang; Gang Fu; Yanglin Chen; Chaokun Yang; Jianmin Sun
Source:
Journal of colloid and interface science 2022 v.609 pp. 523-534
ISSN:
0021-9797
Subject:
X-ray photoelectron spectroscopy; adsorption; boron; carbon dioxide; carbon nitride; catalysts; catalytic activity; cycloaddition reactions; density functional theory; epoxides; melamine; potassium; propylene oxide; reaction mechanisms; tetrabutylammonium compounds
Abstract:
... Much endeavor has been devoted to efficient heterogeneous catalysts for carbon dioxide (CO₂) conversion to high-value chemicals. Meanwhile, the cycloaddition of CO₂ to epoxides is considered as a green and atom-economy reaction to produce cyclic carbonates. Herein, a series of K, B co-doped CN with various doping contents (K, B-CN-X) were developed by simple one-step calcination of melamine and KB ...
DOI:
10.1016/j.jcis.2021.11.053

6. Highly dispersive Ru confined in porous ultrathin g-C3N4 nanosheets as an efficient peroxymonosulfate activator for removal of organic pollutants

Author:
Yu Yin; Mengxuan Liu; Lei Shi; Shu Zhang; Rajan Arjan Kalyan Hirani; Chengzhang Zhu; Chuanxiang Chen; Aihua Yuan; Xiaoguang Duan; Shaobin Wang; Hongqi Sun
Source:
Journal of hazardous materials 2022 v.435 pp. 128939
ISSN:
0304-3894
Subject:
2,4,6-trichlorophenol; 4-chlorophenol; air; carbon nitride; catalysts; catalytic activity; graphene; methyl orange; nanosheets; oxytetracycline; tetracycline
Abstract:
... Ru species were loaded on a two-dimensional (2D) material of graphitic carbon nitride (2D g-C₃N₄) to serve as the efficient AOP catalysts. The catalytic activity was closely related to the dispersion degree of Ru, as determined by the inherent nanoarchitecture of the supporting material. Ultrathin g-C₃N₄ nanosheets with a unique porous structure were fabricated by further thermally oxidizing and e ...
DOI:
10.1016/j.jhazmat.2022.128939

7. Highly efficient isomerization of glucose to fructose over a novel aluminum doped graphitic carbon nitride bifunctional catalyst

Author:
Bo Cai; Junfeng Feng; Dayi Guo; Shuai Wang; Tianyi Ma; Thomas L. Eberhardt; Hui Pan
Source:
Journal of cleaner production 2022 v.346 pp. 131144
ISSN:
0959-6526
Subject:
Lewis acids; acidity; additive effect; aluminum; aluminum chloride; biomass; carbon nitride; catalysts; catalytic activity; condensation reactions; cost effectiveness; fructose; glucose; graphene; isomerization; lignocellulose; urea
Abstract:
... Glucose isomerization to fructose is a crucial step for the efficient production of fuel and valuable chemicals from renewable carbohydrates. Aluminum (Al) was introduced into the structure of a graphitic carbon nitride (g-C₃N₄) by a simple thermal polycondensation of urea and aluminum chloride, and thereby, provided a series of Al-doped g-C₃N₄ (xAl-UCN) catalysts for the isomerization reaction. A ...
DOI:
10.1016/j.jclepro.2022.131144

8. Noble metal nanoparticles (Mx = Ag, Au, Pd) decorated graphitic carbon nitride nanosheets for ultrafast catalytic reduction of anthropogenic pollutant, 4-nitrophenol

Author:
Karunamoorthy Saravanakumar; Velmurugan Shanmuga Priya; Vellaichamy Balakumar; Seenivasan Lakshmi Prabavathi; Velluchamy Muthuraj
Source:
Environmental research 2022 v.212 pp. 113185
ISSN:
0013-9351
Subject:
aminophenols; carbon nitride; catalysts; catalytic activity; electron transfer; graphene; nanocomposites; nanosheets; p-nitrophenol; pollutants; remediation; research; sodium borohydride; stabilizers
Abstract:
... We report an effective facile immobilization of noble nanoparticles (Mₓ = Ag, Au and Pd) assembled on g-C₃N₄ (g-CN) prepared via a simple ultra-sonication strategy. The Mₓ assembled g-CN nanocomposites were applied for the effective conversion of 4-nitrophenol (4-NP). As prepared nanocomposites were characterized by techniques of XRD, SEM-EDS, TEM, XPS, and FT-IR analysis to gain crystallographic ...
DOI:
10.1016/j.envres.2022.113185

9. Porous P, Fe-doped g-C3N4 nanostructure with enhanced photo-Fenton activity for removal of tetracycline hydrochloride: Mechanism insight, DFT calculation and degradation pathways

Author:
Shuai Mao; Chun Liu; Yi Wu; Mingzhu Xia; Fengyun Wang
Source:
Chemosphere 2022 v.291 pp. 133039
ISSN:
0045-6535
Subject:
carbon nitride; catalysts; catalytic activity; graphene; hydroxyl radicals; melamine; pH; polymerization; surface area; tetracycline
Abstract:
... This study fabricated an efficient P and Fe co-doping graphitic carbon nitride catalyst (Fe– CN/P) by thermal polymerization of melamine, FeCl₃, and 2-hydroxyphosphonoacetic acid (HPAA) mixture. The Fe–CN/P catalyst exhibited much better tetracycline hydrochloride (TCH) degradation performance than that of single doping and neat CN. Various characterizations indicated that the introduction of HPAA ...
DOI:
10.1016/j.chemosphere.2021.133039

10. S-Doping Promotes Pyridine Nitrogen Conversion and Lattice Defects of Carbon Nitride to Enhance the Performance of Zn–Air Batteries

Author:
Hao Lei; Mangwei Cui; Yan Huang
Source:
ACS applied materials & interfaces 2022 v.14 no.30 pp. 34793-34801
ISSN:
1944-8252
Subject:
air; carbon nitride; catalysts; catalytic activity; electrochemistry; electrodes; nitrogen; oxygen production; pyridines
Abstract:
... The efficient operation of Zn–air batteries (ZABs) requires highly active and stable reversible air catalysts. Studies have shown that heteroatom-doped carbonaceous nanomaterials are effective metal-free electrocatalysts for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR). Herein, we design a facile and scalable catalyst doping scheme to manufacture S-doped carbon nitri ...
DOI:
10.1021/acsami.2c09019

11. Supported Cu₃ clusters on graphitic carbon nitride as an efficient catalyst for CO electroreduction to propene

Author:
Yuting Sun; Shuang Wang; Jingjing Jia; Yuejie Liu; Qinghai Cai; Jingxiang Zhao
Source:
Journal of materials chemistry A 2022 v.10 no.27 pp. 14460-14469
ISSN:
2050-7496
Subject:
carbon monoxide; carbon nitride; catalysts; catalytic activity; density functional theory; electrochemistry; graphene; propylene; value added
Abstract:
... The electroreduction of carbon monoxide (COER) to multi-carbon (C₂₊) products has been emerging as a promising strategy for generating value-added fuels and chemicals, yet the development of efficient catalysts for this process still remains a huge challenge. Herein, by means of density functional theory (DFT) computations, we explored the catalytic performance of several sub-nano Cu clusters (Cuₙ ...
DOI:
10.1039/d2ta02463b

12. Supported palladium-catalyzed carbonylative cyclization of 2-bromonitrobenzenes and alkynes to access quinolin-4(1H)-ones

Author:
Jian-Shu Wang; Chenyu Li; Jun Ying; Tiefeng Xu; Wangyang Lu; Chuan-Ying Li; Xiao-Feng Wu
Source:
Journal of catalysis 2022 v.408 pp. 81-87
ISSN:
0021-9517
Subject:
alkynes; carbon nitride; catalysts; catalytic activity; graphene; nitroaromatic compounds; nitrogen; palladium; reducing agents
Abstract:
... A palladium supported on graphitic carbon nitride (Pd/g-C₃N₄) catalyzed carbonylative cyclization of 2-bromonitrobenzenes and alkynes has been developed for the expedite construction of quinolin-4(1H)-one scaffolds. By using a low loading heterogeneous palladium catalyst, Mo(CO)₆ as both the CO surrogate and the reductant, and nitroarenes as the nitrogen source, the reaction proceeded well to give ...
DOI:
10.1016/j.jcat.2022.02.026

13. Synthesis of cuprous oxide nanoparticles on graphitic carbon nitride and reduced graphene oxide and their catalytic performance toward the reduction of 4-nitrophenol

Author:
Zhiling Xiang; Xinyi Wang; Lina Xu; Zhen Wang; Jiaqi Meng; Jingjia Zhang; Jingxiang Zhao; Hongxia Wang
Source:
Journal of materials science 2022 v.57 no.4 pp. 2424-2435
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon nitride; catalysts; catalytic activity; cuprous oxide; desorption; dielectric spectroscopy; graphene; graphene oxide; p-nitrophenol; transmission electron microscopy
Abstract:
... In this work, a desired Cu₂O catalyst supported on graphitic carbon nitride and reduced graphene oxide hybrid (Cu₂O/g-C₃N₄–rGO) with excellent catalytic performance in the reduction of 4-nitrophenol (4-NP) by NaBH₄ has been fabricated. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedan ...
DOI:
10.1007/s10853-021-06771-8

14. Synthesis of heteropolyacid (HPA) functionalized graphitic carbon nitride as effective catalysts for converting polysaccharides into high-value chemicals

Author:
Jinghui Wu; Xianze Wang; Jiaying Song; Qiwen Wang; Linchong Shi; Xiaohong Wang; Mingxin Huo
Source:
Resources, conservation, and recycling 2022 v.185 pp. 106473
ISSN:
0921-3449
Subject:
biomass; carbon nitride; catalysts; catalytic activity; cellobiose; cellulose; graphene; hydrolysis; hydroxymethylfurfural; pollution; pollution control; starch; sucrose
Abstract:
... Using renewable biomass resources to replace fossil resources has been regarded as an effective way to restore and protect the natural environment. Cellulose as a polysaccharide exists in nature or environmental pollution control facilities in the production process. To recover and effectively transform cellulose or other polysaccharide substances into more valuable products, a series of heteropol ...
DOI:
10.1016/j.resconrec.2022.106473

15. An efficient and robust chain-mail electrocatalyst Ni2P @ g-C3N4 for oxygen evolution in alkaline solution

Author:
Fushan Wen; Tao Zhang; Wenliang Liu; Yajie Li; Le Pang; Xiaoli Huang; Dong Liu
Source:
Colloids and surfaces 2022 v.646 pp. 128929
ISSN:
0927-7757
Subject:
carbon nitride; catalysts; catalytic activity; encapsulation; graphene; nanoflowers; oxygen production; phosphides
Abstract:
... The development of an efficient, durable and inexpensive catalyst for electrocatalytic water splitting is a daunting challenge and has attracted the interest of a large number of researchers. In this study, a novel oxygen evolution reaction (OER) electrocatalyst based on graphitic carbon nitride (g-C₃N₄) layers encapsulated with Ni₂P nanoflowers (Ni₂P @ g-C₃N₄) is synthesized, which exhibits low o ...
DOI:
10.1016/j.colsurfa.2022.128929

16. A stable single-atom Zn catalyst synthesized by a ligand-stabilized pyrolysis strategy for selective oxidation of C–H bonds

Author:
Wenhui Wang; Ningzhao Shang; Junmin Wang; Xinhao Nie; Congcong Du; Xin Zhou; Xiang Cheng; Wei Gao; Xue Liu; Jianyu Huang; Yuqing Qiao; Shutao Gao; Chun Wang
Source:
Green chemistry 2022 v.24 no.15 pp. 6008-6015
ISSN:
1463-9270
Subject:
X-ray absorption spectroscopy; carbon nitride; catalysts; catalytic activity; density functional theory; graphene; green chemistry; ligands; nitrogen; oxidation; pyrolysis; reaction mechanisms; transmission electron microscopy
Abstract:
... The activation of C–H bonds for the synthesis of highly valued chemicals is still a challenging task. Herein, a nitrogen-doped carbon supported single atom Zn catalyst (Zn–N–C) was fabricated via a ligand-stabilized pyrolysis strategy, in which 2,2′-bipyridine (bipy) served as a ligand and graphitic carbon nitride (g-C₃N₄) served as a directional 2D-template and a nitrogen source. The results of h ...
DOI:
10.1039/d2gc01831d

17. CoO-3D ordered mesoporous carbon nitride (CoO@mpgCN) composite as peroxymonosulfate activator for the degradation of sulfamethoxazole in water

Author:
Thanh Binh Nguyen; C.P. Huang; Ruey-an Doong; Chiu-Wen Chen; Cheng-Di Dong
Source:
Journal of hazardous materials 2021 v.401 pp. 123326
ISSN:
0304-3894
Subject:
antibiotics; carbon nitride; catalysts; catalytic activity; cobalt; electron paramagnetic resonance spectroscopy; electron transfer; pH; porous media; reaction mechanisms; remediation; sulfamethoxazole; surface area
Abstract:
... A facile impregnation method was used to fabricate a hybrid CoO-3D ordered mesoporous carbon nitride (CoO@mpgCN) catalyst that effectively activated peroxymonosulfate (PMS) for the degradation of pharmaceutical chemical, exemplified by antibiotic sulfamethoxazole (SMX) in aqueous solutions. The CoO@mpgCN/PMS system exhibited high catalytic reactivity and SMX removal efficiency over a wide pH range ...
DOI:
10.1016/j.jhazmat.2020.123326

18. Cu-doped g-C3N4 catalyst with stable Cu0 and Cu+ for enhanced amoxicillin degradation by heterogeneous electro-Fenton process at neutral pH

Author:
Guifang Pan; Zhirong Sun
Source:
Chemosphere 2021 v.283 pp. 131257
ISSN:
0045-6535
Subject:
amoxicillin; carbon nitride; catalysts; catalytic activity; chlorides; dicyandiamide; electrolysis; graphene; hydroxyl radicals; pH; pyrolysis; surface water; wastewater
Abstract:
... The development of new heterogeneous Cu-based solid catalysts for hydroxyl radical (∙OH) generation plays a crucial role in degradation of pollutants at neutral pH circumstance. In this work, a Cu-doped graphitic carbon nitride (g-C₃N₄) complex was synthesized in one-step pyrolysis process using copper chloride dihydrate and dicyandiamide as precursors. The results reveal that after Cu doping, the ...
DOI:
10.1016/j.chemosphere.2021.131257

19. Dual-regulation effects of intramolecular doping and surface modification on carbon nitride towards efficient degradation of bisphenol A

Author:
Yan Zhu; Hongjun Dong; Ming Yan; Haibo Zhang; Chunmei Li; Juan Han; Lei Wang; Yun Wang
Source:
Colloids and surfaces 2021 v.623 pp. 126724
ISSN:
0927-7757
Subject:
benzoquinones; bisphenol A; carbon nitride; catalysts; catalytic activity; mineralization; peroxidase
Abstract:
... A new photo-enzyme composite catalyst is prepared based on a dual-modification strategy that is the intramolecular doping of p-benzoquinone and following surface decoration of horseradish peroxidase (HRP) for g-C₃N₄. The fabricated CNBQ/HRP photo-enzyme composite catalyst can effectively break down bisphenol A (BPA) in water, which exhibits a maximal 7.78 times rate constant and 4.18 times mineral ...
DOI:
10.1016/j.colsurfa.2021.126724

20. Efficient persulfate non-radical activation of electron-rich copper active sites induced by oxygen on graphitic carbon nitride

Author:
Hui Song; Zhuang Liu; Zeyu Guan; Fan Yang; Dongsheng Xia; Dongya Li
Source:
Science of the total environment 2021 v.762 pp. 143127
ISSN:
0048-9697
Subject:
active sites; adsorption; bisphenol A; carbon nitride; catalysts; catalytic activity; environment; graphene; oxygen
Abstract:
... Peroxymonosulfate (PMS) non-radical reactions possess high catalytic activity for specific pollutants under complex water environments. However, the synthesis of high-performance catalysts and the discussion of non-radical reaction mechanisms are still unsatisfactory. Here, a novel and efficient non-radical catalyst (O-CuCN) was successfully assembled using the scheme of Copper (Cu) and oxygen (O) ...
DOI:
10.1016/j.scitotenv.2020.143127

21. Fe3O4/g-C3N4-CeOx fabricated by in situ-reduction towards solvent-free oxidation of styrene to benzaldehyde

Author:
Xiujun Yang; Hongxia Wang; Songnan Li; Bin Lu; Jingxiang Zhao; Qinghai Cai
Source:
Colloids and surfaces 2021 v.616 pp. 126309
ISSN:
0927-7757
Subject:
benzaldehyde; carbon nitride; catalysts; catalytic activity; oxidants; oxidation; styrene
Abstract:
... Fe and Ce incorporated graphic carbon nitride Fe-Ce/g-C₃N₄ was fabricated with Fe(NO₃)₃, (NH₄)₄Ce (SO₄)₄ and g-C₃N₄ as precursors and its surface composition and structure was identified by XRD, SEM, TEM, FT-IR, XPS, ICP-OES and N₂ adsorption-desorption approach. The results demonstrated that the hybrid composite was constituted with Fe₃O₄ supported on CeOₓ, where Fe₃O₄ crystals were formed by in ...
DOI:
10.1016/j.colsurfa.2021.126309

22. Graphitic Carbon Nitride as a Sustainable Catalyst for Selective Ethanol Oxidation

Author:
Nataliya D. Shcherban; Olena A. Diyuk; Valery A. Zazhigalov; Dmitry Yu. Murzin
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.14 pp. 5128-5137
ISSN:
2168-0485
Subject:
acetaldehyde; air; carbon nitride; catalysts; catalytic activity; ethanol; graphene; green chemistry; heat; melamine; nitrogen; oxidation
Abstract:
... Graphitic carbon nitride (g-C₃N₄) is obtained via a simple procedure consisting of melamine heating in air without any templates and additional treatments. The prepared g-C₃N₄, being a metal-free material, demonstrates a promising catalytic performance for the selective oxidation of ethanol yielding acetaldehyde (conversion of ethanol up to 100%, yield of acetaldehyde up to 69%). In the investigat ...
DOI:
10.1021/acssuschemeng.1c00138

23. Heterogeneous Fenton-like surface properties of oxygenated graphitic carbon nitride

Author:
Wanessa L. Oliveira; Meiriele Antunes Ferreira; Henrique A.J.L. Mourão; Manoel J.M. Pires; Vinícius Ferreira; Honória F. Gorgulho; Daniel F. Cipriano; Jair C.C. Freitas; Valmor R. Mastelaro; Otaciro R. Nascimento; Dalva E.C. Ferreira; Frederico Ramos Fioravante; Márcio C. Pereira; João P. de Mesquita
Source:
Journal of colloid and interface science 2021 v.587 pp. 479-488
ISSN:
0021-9797
Subject:
carbon nitride; catalysts; catalytic activity; graphene; hydrogen peroxide; indigo carmine; oxidation
Abstract:
... The photo-Fenton activity of graphitic carbon nitride (g-C₃N₄) has been widely studied, nevertheless, its Fenton-like catalytic behavior in the dark has not yet been demonstrated. In the present work, it is shown that oxygenated g-C₃N₄ obtained at different temperatures (500–600 °C) can degrade indigo carmine with hydrogen peroxide in the dark by a reaction similar to a conventional Fenton’s react ...
DOI:
10.1016/j.jcis.2020.12.031

24. Highly efficient g-C3N4 supported ruthenium catalysts for the catalytic transfer hydrogenation of levulinic acid to liquid fuel γ-valerolactone

Author:
Bo Cai; Yongjian Zhang; Junfeng Feng; Cong Huang; Tianyi Ma; Hui Pan
Source:
Renewable energy 2021 v.177 pp. 652-662
ISSN:
0960-1481
Subject:
carbon nitride; catalysts; catalytic activity; graphene; hydrogenation; levulinic acid; liquids; melamine; ruthenium; urea
Abstract:
... Gamma-valerolactone (GVL) is a versatile building block compound with wide applications and it can be obtained from biomass-derived chemical levulinic acid (LA). In this study, graphite carbon nitride (g-C₃N₄) were prepared from two different precursors (urea and melamine) and used as the support to anchor ruthenium (Ru) nanoparticle (Ru/g-C₃N₄) for catalytic transfer hydrogenation of LA to GVL. T ...
DOI:
10.1016/j.renene.2021.05.159

25. Hydrothermally exfoliated P-doped g-C3N4 decorated with gold nanorods for highly efficient reduction of 4-nitrophenol

Author:
Hamed Mohtasham; Behnam Gholipour; Sadegh Rostamnia; Azra Ghiasi-Moaser; Mustafa Farajzadeh; Nasrin Nouruzi; Ho Won Jang; Rajender S. Varma; Mohammadreza Shokouhimehr
Source:
Colloids and surfaces 2021 v.614 pp. 126187
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aqueous solutions; carbon nitride; catalysts; catalytic activity; gold; graphene; nanohybrids; nanorods; nitroaromatic compounds; p-nitrophenol; phosphorus; photoluminescence; reducing agents; transmission electron microscopy
Abstract:
... Au nanorods (AuNRs) decorated phosphorus doped graphitic carbon nitride AuNRs/g-C₃N₍₄₋ₓ₎Pₓ-NS catalyst have been designed and prepared by a facile hydrothermal approach, which is useful for the efficient reduction of nitroaromatics in aqueous solution using NaBH₄⁻ as reductant. A series of conventional characterizations like X-ray diffraction, scanning/transmission electron microscopy, Electron di ...
DOI:
10.1016/j.colsurfa.2021.126187

26. Novel Carbon Nitride/Metal Oxide Nanocomposites as Efficient and Robust Catalysts for Coupling of CO₂ and Epoxides

Author:
Yongqiang Gu; Ran Ping; Fusheng Liu; Guangyu Zhang; Mengshuai Liu; Jianmin Sun
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.16 pp. 5723-5732
ISSN:
1520-5045
Subject:
carbon dioxide; carbon nitride; catalysts; catalytic activity; cycloaddition reactions; epoxides; graphene; nanocomposites; process design; pyrolysis; tetrabutylammonium compounds
Abstract:
... Several environmentally benign graphitic carbon nitride (g-C₃N₄)-based nanocomposites with Lewis acid–base dual functionalities were developed through the pyrolysis of deep-eutectic solvents (DESs). They were used as heterogeneous catalysts for cycloaddition of CO₂ to epoxides. The catalysts’ structures and different process conditions were optimized, and a comparison of the catalytic activity was ...
DOI:
10.1021/acs.iecr.0c05966

27. Synergetic effect of functionalized graphitic carbon nitride catalyst and ultrasound in aqueous medium: An efficient and sustainable synthesis of 1,3,5-trisubstituted hexahydro-1,3,5-triazines

Author:
Anshu Dandia; Pratibha Saini; Krishan Kumar; Mukul Sethi; Kuldeep S. Rathore; Mohan Lal Meena; Vijay Parewa
Source:
Current research in green and sustainable chemistry 2021 v.4 pp. 100170
ISSN:
2666-0865
Subject:
analytical methods; carbon nitride; catalysts; catalytic activity; formaldehyde; graphene; green chemistry; melamine; research; synergism; ultrasonic treatment; ultrasonics
Abstract:
... Graphitic carbon nitride (g-C₃N₄) was synthesized by melamine and functionalized by H₂SO₄ treatment using ultrasound assisted method. As prepared functional carbon nitride (Sg–C₃N₄) was characterized by diverse analytical technique and used as a reusable catalyst for the preparation of 1,3,5-trisubstituted hexahydro-1,3,5-triazine derivatives using aryl amines and formaldehyde as a reactant in aqu ...
DOI:
10.1016/j.crgsc.2021.100170

28. A pseudo-homogeneous system for PET glycolysis using a colloidal catalyst of graphite carbon nitride in ethylene glycol

Author:
Zishuai Wang; Yaoqiang Wang; Shengnan Xu; Yu Jin; Zequn Tang; Gang Xiao; Haijia Su
Source:
Polymer degradation and stability 2021 v.190 pp. 109638
ISSN:
0141-3910
Subject:
Lewis acids; Lewis bases; bisphenol A; carbon nitride; carbonates; catalysts; catalytic activity; degradation; ethylene glycol; glycolysis; graphene; hydrogen bonding; methanolysis; pollution; polylactic acid
Abstract:
... Glycolysis of poly (ethylene terephthalate) (PET) is a promising way to recycle waste PET and produce bis-(2-hydroxyl ethyl) terephthalate (BHET), the monomer of PET. However, traditional catalysts will cause environment pollution and economic burden. In this work, based on the green and low-cost graphitic carbon nitride colloid, we developed a pseudo-homogeneous system for PET glycolysis, and pol ...
DOI:
10.1016/j.polymdegradstab.2021.109638

29. (Fe,N-codoped carbon nanotube)/(Fe-based nanoparticle) nanohybrid derived from Fe-doped g-C3N4: A superior catalyst for oxygen reduction reaction

Author:
Yanpei Zhang; Ruibin Jiang; Zhongke Wang; Yanzhong Xue; Jie Sun; Yingjie Guo
Source:
Journal of colloid and interface science 2020 v.579 pp. 391-400
ISSN:
0021-9797
Subject:
batteries; carbon nanotubes; carbon nitride; carbonization; catalysts; catalytic activity; electrochemistry; fuel cells; iron; moieties; nanohybrids; nanoparticles
Abstract:
... Transition metal- and N-codoped carbon nanotubes (CNTs) have superior catalytic activity because the curling surface enhances the bonding ability of atoms within CNTs to other species. However, it is a great challenge to prepare CNTs with transition metal- and N-doped at high level during the growth of CNTs. Here, (Fe,N-codoped CNT)/(Fe-based nanoparticle) (Fe,N-CNT/FeNP) hybrid nanostructures are ...
DOI:
10.1016/j.jcis.2020.06.057

30. Activating palladium nanoparticles via a Mott-Schottky heterojunction in electrocatalytic hydrodechlorination reaction

Author:
Min Chen; Song Shu; Junxi Li; Xiaoshu Lv; Fan Dong; Guangming Jiang
Source:
Journal of hazardous materials 2020 v.389 pp. 121876
ISSN:
0304-3894
Subject:
2,4-dichlorophenol; anions; carbon nitride; catalysts; catalytic activity; chlorides; dechlorination; electrochemistry; nanoparticles; nitrates; nitrites; palladium; phenol; pollutants; pollution control; polymers; sulfides; sulfur; surface water
Abstract:
... This work exploited one novel power of the Mott-Schottky heterojunction interface in activating the palladium (Pd) in electrocatalytic hydrodechlorination reaction (EHDC, one reaction targeted for the abatement of chlorinated organic pollutants from water). By forming a Mott-Schottky contact with polymer carbon nitride (Pd-PCN), the Pd nanoparticles enable a relatively complete and pseudo-first-or ...
DOI:
10.1016/j.jhazmat.2019.121876

31. Atomically dispersed asymmetric Cu–B pair on 2D carbon nitride synergistically boosts the conversion of CO into C₂ products

Author:
Tianwei He; Karsten Reuter; Aijun Du
Source:
Journal of materials chemistry A 2020 v.8 no.2 pp. 599-606
ISSN:
2050-7496
Subject:
Gibbs free energy; active sites; carbon monoxide; carbon nitride; catalysts; catalytic activity; chemical bonding; copper; dimerization; energy; ethanol; ethylene; fuels; graphene; hydrogen production; light; molecular dynamics; simulation models; thermal stability; value added
Abstract:
... The deeper reduction of CO to multi-carbon-based fuels with higher energy densities and wider applicability has recently triggered extensive experimental and theoretical research. However, present-day catalysts for the generation of multi-carbon products (C₂₊) suffer from ultra-high energy barrier for C–C bond formation and poor selectivity, which poses great challenges for practical application. ...
DOI:
10.1039/c9ta12090d

32. Bimetallic Ni–Pt nanoparticles immobilized on mesoporous N-doped carbon as a highly efficient catalyst for complete hydrogen evolution from hydrazine borane

Author:
Wei Wang; Xiaoling Hong; Qilu Yao; Zhang-Hui Lu
Source:
Journal of materials chemistry A 2020 v.8 no.27 pp. 13694-13701
ISSN:
2050-7496
Subject:
ambient temperature; carbon; carbon nitride; carbon tetrachloride; catalysts; catalytic activity; dehydrogenation; ethylenediamines; hydrazine; hydrogen; hydrogen production; mass transfer; nanocomposites; nanoparticles; nickel; nitrogen content; platinum; porosity; porous media; pyrolysis; surface area
Abstract:
... In this work, mesoporous N-doped carbon (MNC) materials have been successfully prepared by a nanocasting route using SBA-15 as the template and ethylenediamine (EDA) and carbon tetrachloride (CTC) as carbon nitride precursors. The specific surface area and pore size of the MNC, as well as the C/N content are strongly dependent on the pyrolysis temperature. The as-obtained MNC-supported NiPt nanopa ...
DOI:
10.1039/d0ta05322h

33. Bridging metal-ion induced vertical growth of MoS2 and overall fast electron transfer in (C,P)3N4-M (Ni2+, Co2+)-MoS2 electrocatalyst for efficient hydrogen evolution reaction

Author:
Yao Xu; Jiangtao Qu; Ying Li; Mingyuan Zhu; Yang Liu; Rongkun Zheng; Julie M. Cairney; Wenxian Li
Source:
Sustainable materials and technologies 2020 v.25 pp. e00172
ISSN:
2214-9937
Subject:
active sites; carbon nitride; catalysts; catalytic activity; cobalt; electrochemistry; electron transfer; hydrogen production; ions; molybdenum disulfide; nanosheets; nickel; semiconductors
Abstract:
... Highly dispersed molybdenum disulfide (MoS₂) nanosheets are perpendicularly grown on the phosphorus-doped carbon nitride ((C,P)₃N₄) nanolayers assisted with nickel and cobalt as metal-ion bridges in order to form high-quality (C,P)₃N₄-M (Ni²⁺, Co²⁺)-MoS₂ electrocatalysts for efficient hydrogen evolution reaction (HER). Our research demonstrates that nickel and cobalt ions assisted growth could rem ...
DOI:
10.1016/j.susmat.2020.e00172

34. Carbon Nitride-Based Single-Atom Cu Catalysts for Highly Efficient Carboxylation of Alkynes with Atmospheric CO₂

Author:
Peng Yang; Shouwei Zuo; Fengtao Zhang; Bo Yu; Shien Guo; Xiaoxiao Yu; Yanfei Zhao; Jing Zhang; Zhimin Liu
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.16 pp. 7327-7335
ISSN:
1520-5045
Subject:
X-ray absorption spectroscopy; alkynes; carbon; carbon dioxide; carbon nitride; carboxylation; catalysts; catalytic activity; chlorides; copper; density functional theory; energy; heat production; nitrogen; porous media; urea
Abstract:
... Single-atom metal catalysts (SAMCs) have high catalytic activity, but mass production of SAMCs with high metal loading remains challenging. In this work, a two-step and one-pot strategy is presented to prepare mesoporous carbon nitride (CN)-based Cu single-atom catalysts (Cu–CN-x, where x refers to the metal loading in wt %) with ultrahigh metal loadings (e.g., up to 26.6 wt %), in which the mixtu ...
DOI:
10.1021/acs.iecr.0c00547

35. Cobalt-Based Multicomponent Oxygen Reduction Reaction Electrocatalysts Generated by Melamine Thermal Pyrolysis with High Performance in an Alkaline Hydrogen/Oxygen Microfuel Cell

Author:
Haihong Zhong; Luis Alberto Estudillo-Wong; Yuan Gao; Yongjun Feng; Nicolas Alonso-Vante
Source:
ACS applied materials & interfaces 2020 v.12 no.19 pp. 21605-21615
ISSN:
1944-8252
Subject:
X-ray diffraction; carbon; carbon nitride; catalysts; catalytic activity; chemical composition; cobalt; crystallites; electrochemistry; electrolytes; encapsulation; heat treatment; hydrogen; melamine; moieties; nitrogen; oxygen; platinum; pyrolysis; temperature
Abstract:
... A series of cobalt-based multicomponent electrocatalysts (Co-Cat-T) for the oxygen reduction reaction (ORR) were synthesized by thermal pyrolysis of activated carbon-supported cobalt and melamine mixture from 500 to 800 °C. Their corresponding electrocatalytic performance was systematically investigated toward ORR in an alkaline electrolyte. The electrocatalyst chemical composition and structure e ...
DOI:
10.1021/acsami.0c02884

36. Constructing Conductive Channels between Platinum Nanoparticles and Graphitic Carbon Nitride by Gamma Irradiation for an Enhanced Oxygen Reduction Reaction

Author:
Xiang Shi; Wei Wang; Xiaran Miao; Feng Tian; Zhiwei Xu; Nan Li; Miaolei Jing
Source:
ACS applied materials & interfaces 2020 v.12 no.41 pp. 46095-46106
ISSN:
1944-8252
Subject:
carbon nitride; catalysts; catalytic activity; electrochemistry; gamma radiation; graphene; nanocomposites; oxygen; platinum
Abstract:
... Electrocatalytic performance of low-cost graphitic carbon nitride (g-C₃N₄) is greatly limited by its conductivity. In this work, an innovative method, gamma irradiation technology, was used to efficiently synthesize g-C₃N₄/Pt nanoparticle (CN/Pt) nanocomposites, which can construct conductive channels between the nanostructure g-C₃N₄ and supported platinum nanoparticles (PtNPs). Then, the as-prepa ...
DOI:
10.1021/acsami.0c12838

37. Construction of sponge-like graphitic carbon nitride and silver oxide nanocomposite probe for highly sensitive and selective turn-off fluorometric detection of hydrogen peroxide

Author:
Aftab Ahmed; Akhtar Hayat; Mian Hasnain Nawaz; Peter John; Muhammad Nasir
Source:
Journal of colloid and interface science 2020 v.558 pp. 230-241
ISSN:
0021-9797
Subject:
X-ray diffraction; ambient temperature; biosensors; carbon nitride; catalysts; catalytic activity; detection limit; dipotassium hydrogen phosphate; electrical properties; energy-dispersive X-ray analysis; fluorescence; fluorometry; graphene; hot water treatment; hydrogen peroxide; nanocomposites; oxidation; photoluminescence; rhodamines; scanning electron microscopy; silver; silver nitrate; silver oxide; wavelengths
Abstract:
... In the present work, spongy graphitic carbon nitride (GCN) and silver oxide nanocomposites were prepared through a facile hydrothermal method at 160 °C for 4 h using GCN, silver nitrate, and dipotassium hydrogen phosphate as the starting materials. The prepared samples were characterized by scanning electron microscopy, energy dispersive X-ray spectrometry, Brunauer-Emmett-Teller method, X-ray dif ...
DOI:
10.1016/j.jcis.2019.09.109

38. Decomposition of ammonium perchlorate: Exploring catalytic activity of nanocomposites based on nano Cu/Cu2O dispersed on graphitic carbon nitride

Author:
Parvathy Chandrababu; Jayalatha Thankarajan; Vishnu Sukumaran Nair; Rajeev Raghavan
Source:
Thermochimica acta 2020 v.691 pp. 178720
ISSN:
0040-6031
Subject:
ammonium perchlorate; calorimetry; carbon nitride; catalysts; catalytic activity; energy; graphene; nanocomposites; surface area; temperature; thermal degradation
Abstract:
... Copper (Cu) and its oxides are well-known catalysts for thermal decomposition of ammonium perchlorate (AP). Nano Cu/Cu₂O dispersed on graphitic carbon nitride (g-C₃N₄) based nanocomposites were synthesised by single displacement reaction and its effect on thermal decomposition of AP was studied. As-prepared catalysts were characterized using various techniques. The catalytic activity of the synthe ...
DOI:
10.1016/j.tca.2020.178720

39. Development of CuAg/Cu2O nanoparticles on carbon nitride surface for methanol oxidation and selective conversion of carbon dioxide into formate

Author:
Roshan Nazir; Anand Kumar; Mohammed Ali Saleh Saad; Sardar Ali
Source:
Journal of colloid and interface science 2020 v.578 pp. 726-737
ISSN:
0021-9797
Subject:
alloys; binding capacity; carbon dioxide; carbon nitride; catalysts; catalytic activity; copper; copper nanoparticles; cupric oxide; cuprous oxide; electrochemistry; electrodes; formates; formic acid; hydrogen; ions; methanol; oxidation; oxygen; silver; sodium borohydride
Abstract:
... Herein we report a catalyst consisting of CuAg/Cu₂O nanoparticles (NPs), synthesized on the two-dimensional carbon nitride (CN) surface via galvanic exchange route for electrocatalytic methanol oxidation and carbon dioxide reduction. The lower reduction potential of copper ([Cu⁺(aq) + e⁻ → Cu(s)], + 0.52 eV) compared to Ag ([Ag⁺(aq) + e⁻ → Ag(s)], +0.80 eV) makes Cu(0) easily exchangeable by Ag⁺ i ...
DOI:
10.1016/j.jcis.2020.06.033

40. Direct Surface Modification of Graphitic C₃N₄ with Porous Organic Polymer and Silver Nanoparticles for Promoting CO₂ Conversion

Author:
Cheng Du; Xingwang Lan; Guangyu An; Qing Li; Guoyi Bai
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.18 pp. 7051-7058
ISSN:
2168-0485
Subject:
adsorption; alcohols; carbon dioxide; carbon nitride; catalysts; catalytic activity; graphene; nanosilver; nitrogen; nuclear magnetic resonance spectroscopy; polymers; silver; surface area
Abstract:
... The development of novel heterogeneous catalysts for converting CO₂ into fine chemicals under mild conditions is extremely attractive but challenging. In this study, graphitic carbon nitride modified by porous organic polymer (POP) and highly dispersed Ag nanoparticles (Ag/POP@g-C₃N₄) was prepared as a highly efficient heterogeneous catalyst for CO₂ conversion for the first time. The POP modifying ...
DOI:
10.1021/acssuschemeng.0c00771

41. Direct Synthesis of Atomically Dispersed Palladium Atoms Supported on Graphitic Carbon Nitride for Efficient Selective Hydrogenation Reactions

Author:
Fenglian Hu; Leipeng Leng; Mingyang Zhang; Wenxing Chen; Yanlong Yu; Jun Wang; J. Hugh Horton; Zhijun Li
Source:
ACS applied materials & interfaces 2020 v.12 no.48 pp. 54146-54154
ISSN:
1944-8252
Subject:
4-chlorophenol; X-ray absorption spectroscopy; carbon nitride; catalysts; catalytic activity; dechlorination; electron microscopy; furfural; graphene; heat treatment; hydrogenation; palladium; styrene
Abstract:
... Heterogeneous catalysts with atomically precise metal sites have enabled unique insight into structure–property relationships in materials science. Herein, we report the construction and selective hydrogenation performance of a single-atom palladium catalyst by confining the palladium atoms into the six-fold N-coordinating cavities of graphitic carbon nitride (g-C₃N₄) through a facile spatial conf ...
DOI:
10.1021/acsami.0c13881

42. Effect of g-C3N4 nano-structure on catalytic performance of CoOx/g-C3N4 in catalytic combustion of toluene

Author:
S.-S. Liu; D.-M. Luo; X. Yang; C.-X. Tong; L.-G. Tao; H.-P. Ding; J. Zhang
Source:
International journal of environmental science and technology 2020 v.17 no.5 pp. 3055-3064
ISSN:
1735-1472
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon nitride; catalysts; catalytic activity; cobalt; combustion; desorption; dicyandiamide; graphene; nanomaterials; nitrogen; particle size; scanning electron microscopy; toluene; transmission electron microscopy
Abstract:
... A series of graphitic carbon nitrides (g-C₃N₄) were prepared using different precursors; these g-C₃N₄-supported CoOx catalysts exhibited different catalytic performances in toluene catalytic combustion reaction. The structure of samples was detected by XRD, TEM, SEM, XPS, H₂-TPR, nitrogen adsorption and desorption technique, to build up the structure–performance relationship and uncover the key pr ...
DOI:
10.1007/s13762-020-02659-3

43. Efficient Visible-Light-Driven CO₂ Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride

Author:
Bing Ma; Gui Chen; Claire Fave; Lingjing Chen; Ryo Kuriki; Kazuhiko Maeda; Osamu Ishitani; Tai-Chu Lau; Julien Bonin; Marc Robert
Source:
Journal of the American Chemical Society 2020 v.142 no.13 pp. 6188-6195
ISSN:
1520-5126
Subject:
X-ray photoelectron spectroscopy; acetonitrile; carbon dioxide; carbon monoxide; carbon nitride; catalysts; catalytic activity; chemical bonding; cobalt; dielectric spectroscopy; durability; graphene; irradiation; porous media
Abstract:
... Achieving visible-light-driven carbon dioxide reduction with high selectivity control and durability while using only earth abundant elements requires new strategies. Hybrid catalytic material was prepared upon covalent grafting a Co–quaterpyridine molecular complex to semiconductive mesoporous graphitic carbon nitride (mpg-C₃N₄) through an amide linkage. The molecular material was characterized b ...
DOI:
10.1021/jacs.9b13930

44. Efficient activation of peroxymonosulfate by composites containing iron mining waste and graphitic carbon nitride for the degradation of acetaminophen

Author:
Hudson A. Bicalho; Regiane D.F. Rios; Ildefonso Binatti; José D. Ardisson; Ashlee J. Howarth; Rochel M. Lago; Ana Paula C. Teixeira
Source:
Journal of hazardous materials 2020 v.400 pp. 123310
ISSN:
0304-3894
Subject:
acetaminophen; carbon nitride; catalysts; catalytic activity; graphene; heat treatment; melamine; surface area; wastes
Abstract:
... In this work, the potential to use an iron mining waste (IW), rich in α-Fe₂O₃ and α-FeOOH, for the development of composites based on graphitic carbon nitride (CN) is demonstrated. These materials were synthesized through a simple thermal treatment at 550 °C of a mixture containing melamine and different IW mass percentages, giving rise to the catalysts xIWCN (where x is related to the initial mas ...
DOI:
10.1016/j.jhazmat.2020.123310

45. Enhanced mineralization of oxalate by highly active and Stable Ce(III)-Doped g-C3N4 catalyzed ozonation

Author:
Yu Xie; Shuhan Peng; Yong Feng; Deli Wu
Source:
Chemosphere 2020 v.239 pp. 124612
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; carbon nitride; carboxylic acids; catalysts; catalytic activity; electron paramagnetic resonance spectroscopy; graphene; hydroxyl radicals; mineralization; moieties; oxalates; ozonation; ozone; pollutants; pollution control; scanning electron microscopy
Abstract:
... The degradation of carboxylic acid has been identified as one of the rate-determining steps in the mineralization of organic pollutants by ozonation. In this study, Ce(III)-doped graphitic carbon nitride (Ce–CN) composites with different Ce(III) contents were synthesized and used as catalysts for the ozonation of oxalate. The morphology and structure of the Ce–CN were comprehensively characterized ...
DOI:
10.1016/j.chemosphere.2019.124612

46. Facile one step synthesis of Cu-g-C3N4 electrocatalyst realized oxygen reduction reaction with excellent methanol crossover impact and durability

Author:
Subhajit Sarkar; S.S. Sumukh; Kingshuk Roy; Navpreet Kamboj; Taniya Purkait; Manisha Das; Ramendra Sundar Dey
Source:
Journal of colloid and interface science 2020 v.558 pp. 182-189
ISSN:
0021-9797
Subject:
active sites; batteries; carbon nitride; catalysts; catalytic activity; copper; durability; electrochemistry; electron transfer; energy conversion; graphene; hydrogen peroxide; methanol; microbial fuel cells; platinum; pyrolysis; renewable energy sources
Abstract:
... Non-precious metal doped carbonaceous materials are currently the most promising alternative towards oxygen reduction reaction (ORR) electrocatalysts in terms of cost, accessibility, efficiency and durability. In this work, a simple one-step pyrolysis process was used for the synthesis of copper doped graphitic carbon nitride (Cu-g-C3N4) as electrocatalyst. The as-synthesized Cu-g-C3N4 material is ...
DOI:
10.1016/j.jcis.2019.09.107

47. Facile synthesis of graphitic carbon nitride/chitosan/Au nanocomposite: A catalyst for electrochemical hydrogen evolution

Author:
Atefeh Nasri; Babak Jaleh; Sadegh Khazalpour; Mahmoud Nasrollahzadeh; Mohammadreza Shokouhimehr
Source:
International journal of biological macromolecules 2020 v.164 pp. 3012-3024
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; biopolymers; carbon nitride; catalysts; catalytic activity; chitosan; electrochemistry; energy-dispersive X-ray analysis; gold; graphene; hydrogen; hydrogen production; liquids; nanocomposites; pyrolysis; stainless steel; transmission electron microscopy; urea; voltammetry
Abstract:
... This paper reports a novel nanocomposite catalyst comprised of graphitic carbon nitride (g-C₃N₄), chitosan and gold (Au) nanoparticles, which has been prepared through a facile, clean and low cost method. Graphitic carbon nitride has been fabricated by pyrolysis of urea. Laser ablation in liquid (LAL) was employed in the green synthesis of Au NPs. The g-C₃N₄/chitosan/Au nanocomposite (denoted as C ...
DOI:
10.1016/j.ijbiomac.2020.08.143

48. Fe and Cu co-doped graphitic carbon nitride as an eco-friendly photo-assisted catalyst for aniline degradation

Author:
Li Li; Ming Liang; Jun Huang; Sai Zhang; Yuan Liu; Fangyun Li
Source:
Environmental science and pollution research international 2020 v.27 no.23 pp. 29391-29407
ISSN:
0944-1344
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aniline; carbon nitride; catalysts; catalytic activity; electric current; graphene; iron; photoluminescence; pollution; reflectance spectroscopy; research
Abstract:
... A novel bimetallic coordinated g-C₃N₄ with Fe₂O₃ composite catalyst (FeCu-g-C₃N₄) was synthesized by simple calcination of Fe³⁺/Cu²⁺/melamine precursor. Its catalytic performance was analyzed via photodegrading aniline. The X-ray diffraction (XRD), field emission scanning electronic microscopy (FESEM), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) were employed to ...
DOI:
10.1007/s11356-020-08148-x

49. General synthesis of carbon and oxygen dual-doped graphitic carbon nitride via copolymerization for non-photochemical oxidation of organic pollutant

Author:
Yue Zhu; Zhenhuan Chen; Yaowen Gao; Chun Hu
Source:
Journal of hazardous materials 2020 v.394 pp. 122578
ISSN:
0304-3894
Subject:
ascorbic acid; carbon nitride; catalysts; catalytic activity; copolymerization; graphene; irradiation; oxidation; oxygen; pollutants; remediation; urea
Abstract:
... Earth-abundant, environmental-benign and durable catalysts are of paramount importance for remediation of organic pollutants, and graphitic carbon nitride (g-C₃N₄) is a promising nonmetallic material for this application. However, the catalytic oxidation on g-C₃N₄ suffers from low efficiency because of its chemical inertness if not irradiated with light. Herein, we develop a facile copolymerizatio ...
DOI:
10.1016/j.jhazmat.2020.122578

50. Graphitic Carbon Nitride (g-C₃N₄)-Derived Bamboo-Like Carbon Nanotubes/Co Nanoparticles Hybrids for Highly Efficient Electrocatalytic Oxygen Reduction

Author:
Xiangjian Liu; Wenxiu Yang; Lulu Chen; Zhenjie Liu; Ling Long; Siyu Wang; Changyu Liu; Shaojun Dong; Jianbo Jia
Source:
ACS applied materials & interfaces 2020 v.12 no.4 pp. 4463-4472
ISSN:
1944-8252
Subject:
active sites; carbon nanotubes; carbon nitride; catalysts; catalytic activity; cobalt; electrochemistry; fuel cells; graphene; methanol; nanoparticles; oxygen; platinum; pyrolysis
Abstract:
... The oxygen reduction reaction (ORR) is an extremely important reaction in many renewable energy-related devices. The sluggish kinetics of the ORR limits the development of many fuel cells. Design and synthesis of highly efficient nonprecious electrocatalysts are of vital importance for electrochemical reduction of oxygen. Herein, we develop a graphitic carbon nitride (g-C₃N₄)-derived bamboo-like c ...
DOI:
10.1021/acsami.9b18454

51. Hierarchical Porous g-C₃N₄ Coupled Ultrafine RuNi Alloys as Extremely Active Catalysts for the Hydrolytic Dehydrogenation of Ammonia Borane

Author:
Yong-Ting Li; Xiao-Li Zhang; Zhi-Kun Peng; Pu Liu; Xiu-Cheng Zheng
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.22 pp. 8458-8468
ISSN:
2168-0485
Subject:
activation energy; alloy nanoparticles; alloys; ammonia; carbon nitride; catalysts; catalytic activity; dehydrogenation; hydrogen; hydrogen production; hydrolysis; nickel; physicochemical properties; reaction kinetics; ruthenium; sodium hydroxide
Abstract:
... It is a crucial and urgent task to develop high performance catalysts for the hydrolysis of ammonia borane (NH₃BH₃, AB), which is presently thought to be an effective strategy for hydrogen generation. In this work, we immobilize the ultrafine RuNi alloy nanoparticles in the network of hierarchical porous g-C₃N₄ thin sheets with a facile adsorption–in situ reduction method. The structural and physi ...
DOI:
10.1021/acssuschemeng.0c03009

52. Highly nitrogen-doped porous carbon transformed from graphitic carbon nitride for efficient metal-free catalysis

Author:
Yaowen Gao; Tong Li; Yue Zhu; Zhenhuan Chen; Jingyuan Liang; Qingyi Zeng; Lai Lyu; Chun Hu
Source:
Journal of hazardous materials 2020 v.393 pp. 121280
ISSN:
0304-3894
Subject:
active sites; carbon nitride; catalysts; catalytic activity; density functional theory; graphene; hydroxyl radicals; mannitol; nitrogen content; oxidation; pollutants; pyrolysis; remediation; singlet oxygen; urea
Abstract:
... Nitrogen-doped carbon materials are proposed as promising metal-free catalysts for persulfate-mediated catalytic oxidation process, yet the nitrogen content in the final carbon products is typically low. Moreover, controversies remain in the unambiguous identification of active sites in nitrogen-doped carbons for persulfate activation. Here we report the facile synthesis of nitrogen-doped carbon m ...
DOI:
10.1016/j.jhazmat.2019.121280

53. Homogeneous detection of 5-hydroxymethylcytosine based on electrochemiluminescence quenching of g-C3N4/MoS2 nanosheets by ferrocenedicarboxylic acid polymer

Author:
Chengji Sui; Qian Wang; Yunlei Zhou; Dingding Zhang; Huanshun Yin; Shiyun Ai
Source:
Talanta 2020 v.219 pp. 121211
ISSN:
0039-9140
Subject:
DNA; Oryza sativa; biosensors; carbon nitride; catalysts; catalytic activity; chick embryos; detection limit; dicarboxylic acids; electrochemiluminescence; electrodes; enzyme activity; fibroblasts; methyltransferases; molybdenum disulfide; nanosheets; phosphates; polymers; rice; seedlings; titanium dioxide
Abstract:
... A sensitively homogeneous electrochemiluminescence (ECL) method was developed for 5-hydroxymethylcytosine (5hmC) detection using TiO₂/MoS₂/g-C₃N₄/GCE as substrate electrode, where g-C₃N₄ was employed as the ECL active material, the MoS₂ nanosheets were used as co-catalyst, and TiO₂ was adopted as phosphate group capture reagent. To achieve the specific recognition and capture of 5hmC, the covalent ...
DOI:
10.1016/j.talanta.2020.121211

54. In Situ Synthesis of MoS₂ on C₃N₄ To Form MoS₂/C₃N₄ with Interfacial Mo–N Coordination for Electrocatalytic Reduction of N₂ to NH₃

Author:
Ziming Zhao; Sha Luo; Ping Ma; Yutong Luo; Wei Wu; Yu Long; Jiantai Ma
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.23 pp. 8814-8822
ISSN:
2168-0485
Subject:
active sites; ammonia; ammonium; carbon nitride; catalysts; catalytic activity; electrochemistry; electrodes; electron transfer; hydrogen; molybdates; molybdenum disulfide; nitrogen; pyrolysis; sodium sulfate; thiourea
Abstract:
... Electrocatalytic nitrogen reduction reaction (NRR), as an alternative to synthetic ammonia under mild condition, provides a promising method for storage and sustainable utilization of ammonia. However, the catalytic performance of the NRR electrocatalyst still requires a systematical investigation and improvement. Herein, this paper reports that MoS₂/C₃N₄ is prepared by in situ controllable synthe ...
DOI:
10.1021/acssuschemeng.0c02763

55. Mesoporous Graphitic Carbon Nitride/Black Phosphorus/AgPd Alloy Nanoparticles Ternary Nanocomposite: A Highly Efficient Catalyst for the Methanolysis of Ammonia Borane

Author:
Sibel Eken Korkut; Hüseyin Küçükkeçeci; Önder Metin
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8130-8139
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetic acid; acid treatment; alloy nanoparticles; alloys; ambient temperature; ammonia; carbon nitride; catalysts; catalytic activity; electric potential difference; graphene; hydrogen; hydrogen production; light emitting diodes; lighting; methanolysis; nanocomposites; palladium; phosphorus; photoluminescence; porous media; semiconductors; silver; transmission electron microscopy
Abstract:
... A novel ternary nanocomposite, mesoporous graphitic carbon nitride/black phosphorus-AgPd (denoted mpg-CN/BP-AgPd), was successfully fabricated by assembling the as-prepared AgPd alloy nanoparticles (NPs) on mesoporous graphitic carbon nitride/black phosphorus (mpg-CN/BP) binary composites. This novel nanocomposite comprises a heterojunction support material formed by two distinct nonmetallic semic ...
DOI:
10.1021/acsami.9b18917

56. Metal nanoparticles decorated sodium alginate‑carbon nitride composite beads as effective catalyst for the reduction of organic pollutants

Author:
Sher Bahadar Khan; Shahid Ahmad; Tahseen Kamal; Abdullah M. Asiri; Esraa M. Bakhsh
Source:
International journal of biological macromolecules 2020 v.164 pp. 1087-1098
ISSN:
0141-8130
Subject:
aminophenols; aqueous solutions; calcium; carbon nitride; catalysts; catalytic activity; dyes; gravity; methyl orange; p-nitrophenol; sodium; sodium alginate
Abstract:
... Herein, a simple method is used for fabrication of carbon nitride (g-C₃N₄) incorporated sodium alginate (Alg) beads. The alginate carbon nitride beads (Alg-CNBs) were prepared by introducing the g-C₃N₄ dispersed Alg aqueous solution to a divalent Ca²⁺ ions solution. Alg-CNBs were further treated with different transition metal salt solutions. The surface coated transition metal ions on Alg-CNBs we ...
DOI:
10.1016/j.ijbiomac.2020.07.091

57. Mn3O4 nanodots loaded g-C3N4 nanosheets for catalytic membrane degradation of organic contaminants

Author:
Congcong Chen; Meng Xie; Lingshuai Kong; Wenhui Lu; Zhenyu Feng; Jinhua Zhan
Source:
Journal of hazardous materials 2020 v.390 pp. 122146
ISSN:
0304-3894
Subject:
4-chlorophenol; batch systems; carbon nitride; catalysts; catalytic activity; filtration; hot water treatment; manganese; manganese oxides; microstructure; nanosheets
Abstract:
... Peroxymonosulfate (PMS) activation by heterogeneous catalysts has been widely investigated to remove organic contaminants. Nevertheless, the technology is restricted to the bench-scale batch system. For practical applications, a supported catalyst design based on a reactor configuration with catalyst recovery is the need for future development. In this study, Mn₃O₄ nanodots-g-C₃N₄ nanosheets (Mn₃O ...
DOI:
10.1016/j.jhazmat.2020.122146

58. NaCl-assisted synthesis of Fe2+ self-doped Fe2O3/C3N4 nanosheets as efficient Fenton catalyst

Author:
Xiaohua Shi; Xiangbin Li; Guolei Liu; Mengqi Du; Jian Zhang; Guodong Liu; Qifang Lu
Source:
Journal of materials science 2020 v.55 no.23 pp. 10035-10046
ISSN:
0022-2461
Subject:
carbon nitride; catalysts; catalytic activity; iron; nanosheets; phenol
Abstract:
... To develop high-activity heterogeneous Fenton catalysts used under mild conditions, the Fe²⁺ self-doped Fe₂O₃/C₃N₄ nanosheet has been successfully synthesized by a NaCl-assisted templating method. The FeₓO₃/C₃N₄ nanosheet shows excellent photo-Fenton catalytic performance for phenol degradation. The degradation constant of the FeₓO₃/C₃N₄ is 13.3 times, 26.1 times and 15.9 times that of Fe₂O₃/C₃N₄, ...
DOI:
10.1007/s10853-020-04775-4

59. Oxidized graphitic carbon nitride as a sustainable metal-free catalyst for hydrogen transfer reactions under mild conditions

Author:
Priyanka Choudhary; Ashish Bahuguna; Ajay Kumar; Sandeep Singh Dhankhar; C. M. Nagaraja; Venkata Krishnan
Source:
Green chemistry 2020 v.22 no.15 pp. 5084-5095
ISSN:
1463-9270
Subject:
active sites; carbon nitride; carbonyl compounds; catalysts; catalytic activity; graphene; green chemistry; hydrogen; hydrogenation; hydrophilicity; isopropyl alcohol; metals; nanosheets; oxidation; solvents; temperature
Abstract:
... The development of green and sustainable transfer hydrogenation protocols without the use of expensive noble metals and toxic solvents is a challenging task. Herein, a highly stable, low-cost, metal-free heterogeneous catalyst, oxidized graphitic carbon nitride (O-GCN), has been developed, which exhibits efficient catalytic hydrogen transfer reactions of carbonyl compounds to corresponding alcohol ...
DOI:
10.1039/d0gc01123a

60. Rhodium/graphitic-carbon-nitride composite electrocatalyst facilitates efficient hydrogen evolution in acidic and alkaline electrolytes

Author:
Binbin Jiang; Aijian Huang; Tao Wang; Qi Shao; Wenxiang Zhu; Fan Liao; Yafei Cheng; Mingwang Shao
Source:
Journal of colloid and interface science 2020 v.571 pp. 30-37
ISSN:
0021-9797
Subject:
adsorption; carbon; carbon nitride; catalysts; catalytic activity; electrochemistry; electrolytes; energy conversion; hydrogen; hydrogen production; nanocrystals; platinum; potassium hydroxide; renewable energy sources; rhodium; sulfuric acid
Abstract:
... Exploring the highly efficient and durable electrocatalysts for hydrogen evolution reaction (HER) is vitally necessary for sustainable energy conversion and storage system. Herein, we fabricate an interfacial engineered Rh-carbon nitride as advanced electrocatalysts for HER in the acidic and alkaline electrolytes. The interface between Rh nanocrystals and carbon nitride may adjust the electronic s ...
DOI:
10.1016/j.jcis.2020.03.022

61. Ru/g-C₃N₄ as an efficient catalyst for selective hydrogenation of aromatic diamines to alicyclic diamines

Author:
Junya Cao; Fenggang Han; Liguo Wang; Xiaoyu Huang; Yan Cao; Peng He; Huanhuan Yang; Jiaqiang Chen; Huiquan Li
Source:
RSC advances 2020 v.10 no.28 pp. 16515-16525
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aromatic compounds; carbon nitride; catalysts; catalytic activity; diamines; hydrogenation; models; nanoparticles; nitrogen; porous media; ruthenium; transmission electron microscopy; ultrasonics
Abstract:
... A series of Ru/g-C₃N₄ materials with highly dispersed Ru were firstly prepared by an ultrasonic impregnation method using carbon nitride as a support. The catalysts were characterized by various techniques including BET and elemental analysis, ICP-AES, XPS, XRD, CO₂-TPD and TEM. The results demonstrated that Ru/g-C₃N₄ materials with a mesoporous structure and highly dispersed Ru were successfully ...
DOI:
10.1039/d0ra00836b

62. Single iron atoms coordinated to g-C₃N₄ on hierarchical porous N-doped carbon polyhedra as a high-performance electrocatalyst for the oxygen reduction reaction

Author:
Tingting Sun; Pianpian Zhang; Wenxing Chen; Kang Wang; Xianzhang Fu; Tianyu Zheng; Jianzhuang Jiang
Source:
Chemical communications 2020 v.56 no.5 pp. 798-801
ISSN:
1364-548X
Subject:
active sites; carbon nitride; catalysts; catalytic activity; chemical reactions; durability; electrochemistry; graphene; iron; mass transfer; platinum; synergism
Abstract:
... Catalysts composed of isolated single Fe atoms coordinated to graphitic carbon nitride (g-C₃N₄) dispersed on hierarchical porous N-doped carbon polyhedra (Fe-g-C₃N₄/HPNCPs) were successfully prepared. The optimized catalyst, Fe-g-C₃N₄/HPNCP-0.8, showed excellent electrocatalytic activity for the oxygen reduction reaction under alkaline conditions with a half-wave potential of 0.902 V, significantl ...
DOI:
10.1039/c9cc07772c

63. Single-atom Pt supported on holey ultrathin g-C3N4 nanosheets as efficient catalyst for Li-O2 batteries

Author:
Wen Zhao; Jun Wang; Rui Yin; Boya Li; Xiaoshuai Huang; Lanling Zhao; Lei Qian
Source:
Journal of colloid and interface science 2020 v.564 pp. 28-36
ISSN:
0021-9797
Subject:
carbon nitride; catalysts; catalytic activity; cathodes; density functional theory; dispersibility; electrical conductivity; electrochemistry; lithium batteries; mass transfer; nanosheets; platinum; surface area
Abstract:
... As for electrocatalysis, single-atom metal catalysts have been proved to lower the cost and utilize precious metals more efficiently. Herein, single-atom Pt catalyst supported on holey ultrathin g-C₃N₄ nanosheets (Pt-CNHS) was synthesized via a facile liquid-phase reaction of g-C₃N₄ and H₂PtCl₆. The single-atom Pt can achieve high dispersibility and stability, which can promote the utilization eff ...
DOI:
10.1016/j.jcis.2019.12.102

64. Synthesis of hydroxide nanoparticles of Co/Cu on carbon nitride surface via galvanic exchange method for electrocatalytic CO2 reduction into formate

Author:
Roshan Nazir; Anand Kumar; Mohammed Ali Saleh Saad; Anchu Ashok
Source:
Colloids and surfaces 2020 v.598 pp. 124835
ISSN:
0927-7757
Subject:
X-ray photoelectron spectroscopy; carbon dioxide; carbon nitride; catalysts; catalytic activity; cobalt; copper; copper hydroxide; copper nanoparticles; electrochemistry; electrodes; energy-dispersive X-ray analysis; formates; ions; reducing agents; scanning electron microscopy; sodium borohydride; transmission electron microscopy
Abstract:
... Herein we report Co and Cu based metal hydroxides (Co(OH)₂/Cu(OH)₂) on carbon nitride (C₃N₄) surface via replacement of Co nanoparticles (NPs) through galvanic exchange method for electrocatalytic carbon dioxide reduction. The lower value of reduction potential in case of cobalt ([Co⁺(aq) + 2e⁻ → Co(s)], −0.28 eV) compared to copper ([Cu²⁺(aq) +2 e⁻ → Cu(s)], +0.34 eV) makes Co(0) easily susceptib ...
DOI:
10.1016/j.colsurfa.2020.124835

65. Three dimensional Pt island-on-Au architectures coupled with graphite carbon nitride nanosheets for effective photo-accelerated methanol electro-oxidation

Author:
Xuandong Wang; Mingjuan Sun; Yan Guo; Jiayue Hu; Mingshan Zhu
Source:
Journal of colloid and interface science 2020 v.558 pp. 38-46
ISSN:
0021-9797
Subject:
carbon nitride; catalysts; catalytic activity; electrochemistry; electrodes; gold; graphene; irradiation; methanol; nanosheets; oxidation; platinum; semiconductors; synergism
Abstract:
... Two dimensional (2D) visible-light-activated graphite carbon nitride (CN) nanosheets were used to deposit the traditional electrocatalyst of Pt and Au through a facile one-pot hydrothermal approach. By adjusting different amount of Pt and Au, 3D Pt island-on-Au architectures were formed on the surface of CN nanosheets (Pt-Au/CN). The obtained Pt-Au/CN composite was used for electrocatalytic methan ...
DOI:
10.1016/j.jcis.2019.09.085

66. Tuning layered Fe-doped g-C3N4 structure through pyrolysis for enhanced Fenton and photo-Fenton activities

Author:
Wei Miao; Ying Liu; Xiaoyan Chen; Yixin Zhao; Shun Mao
Source:
Carbon 2020 v.159 pp. 461-470
ISSN:
0008-6223
Subject:
carbon nitride; catalysts; catalytic activity; graphene; iron; kinetics; pyrolysis; remediation; surface area
Abstract:
... In recent years, design high catalytic graphitic carbon nitride (g–C₃N₄)–based catalysts has drawn broad attention in environmental remediation. In this work, a series of iron-doped g-C₃N₄ compounds were synthesized through a simple bottom-up strategy. By controlled pyrolysis, iron-doped g-C₃N₄ materials split from bulk structure into multi-layer structure with uniformly dispersed mesopores. The c ...
DOI:
10.1016/j.carbon.2019.12.056

67. Two-Dimensional Bimetallic Zn/Fe-Metal-Organic Framework (MOF)-Derived Porous Carbon Nanosheets with a High Density of Single/Paired Fe Atoms as High-Performance Oxygen Reduction Catalysts

Author:
Long Zheng; Siyan Yu; Xueyi Lu; Wenjun Fan; Bin Chi; Yuekun Ye; Xiudong Shi; Jianhuang Zeng; Xiuhua Li; Shijun Liao
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 13878-13887
ISSN:
1944-8252
Subject:
carbon; carbon nitride; catalysts; catalytic activity; durability; electrochemistry; electrodes; electrolytes; hydrogen; iron; nanosheets; nitrogen; oxygen; platinum; stabilizers; surface area; zinc
Abstract:
... Developing efficient non-precious-metal catalysts to accelerate the sluggish oxygen reduction reaction (ORR) is highly desired but remains a great challenge. Herein, using 2D bimetallic Zn/Fe-MOF as the precursor and g-C₃N₄ as the nitrogen source and stabilizer, porous carbon nanosheets doped with large amounts of single/paired Fe atoms (3.89 wt %) and N (10.28 wt %) are successfully prepared. It ...
DOI:
10.1021/acsami.9b22577

68. Two-dimensional (2D)/2D Interface Engineering of a MoS₂/C₃N₄ Heterostructure for Promoted Electrocatalytic Nitrogen Fixation

Author:
Ke Chu; Ya-ping Liu; Yu-biao Li; Ya-li Guo; Ye Tian
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7081-7090
ISSN:
1944-8252
Subject:
Gibbs free energy; adsorption; ammonia; carbon nitride; catalysts; catalytic activity; density functional theory; electrochemistry; energy; hydrogen production; molybdenum; molybdenum disulfide; nitrogen; nitrogen fixation
Abstract:
... The electrochemical nitrogen reduction reaction (NRR) is a very efficient method for sustainable NH₃ production, but it requires effective catalysts to expedite the NRR kinetics and inhibit the concomitant hydrogen evolution reaction (HER). Two-dimensional (2D)/2D interface engineering is an effective method to design powerful catalysts due to intimate face-to-face contact of two 2D materials that ...
DOI:
10.1021/acsami.9b18263

69. Visible-light-mediated high-efficiency catalytic oxidation of sulfides using wrinkled C3N4 nanosheets

Author:
Jingjun Li; Yanning Chen; Xue Yang; Shuiying Gao; Rong Cao
Source:
Journal of catalysis 2020 v.381 pp. 579-589
ISSN:
0021-9517
Subject:
carbon nitride; catalysts; catalytic activity; electrons; light; nanosheets; oxidation; singlet oxygen; sulfides; superoxide anion
Abstract:
... Incorporating visible light into sulfide oxidation is an emerging desirable strategy to produce versatile sulfoxides. We introduce the design and synthesis of multilayered wrinkled C₃N₄ nanosheets and demonstrate their unprecedented sulfide oxidation activity. Due to the wrinkled surfaces with a large SBET (208.6 m²g⁻¹), wrinkled C₃N₄ nanosheets exhibit a sensitive optical response, facilitating t ...
DOI:
10.1016/j.jcat.2019.11.041

70. W supported on g-CN manifests high activity and selectivity for N₂ electroreduction to NH₃

Author:
Shuhua Wang; Wei Wei; Xingshuai Lv; Baibiao Huang; Ying Dai
Source:
Journal of materials chemistry A 2020 v.8 no.3 pp. 1378-1385
ISSN:
2050-7496
Subject:
ammonia; carbon nitride; catalysts; catalytic activity; chromium; cobalt; copper; electrochemistry; geometry; graphene; hydrogen production; iron; manganese; molybdenum; nickel; nitrogen; nitrogen fixation; sustainable technology; titanium; vanadium; zinc
Abstract:
... In comparison to the conventional Haber–Bosch (H–B) process, electrochemical N₂ fixation is a more promising approach for NH₃ production due to its environmentally-friendly process and feasibility under ambient conditions. In this work, by means of first-principles calculations, a series of transition metal (TM) atoms (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo and W) supported on a new kind of gra ...
DOI:
10.1039/c9ta10935h

71. g-C₃N₄/WTe₂ Hybrid Electrocatalyst for Efficient Hydrogen Evolution Reaction

Author:
J. Luis Silva; Barbara Brena; C. Moyses Araujo
Source:
Journal of physical chemistry 2020 v.124 no.16 pp. 8726-8735
ISSN:
1932-7455
Subject:
Gibbs free energy; active sites; adsorption; carbon nitride; catalysts; catalytic activity; chemical bonding; density functional theory; electrochemistry; energy; graphene; hydrogen; hydrogen production; molybdenum disulfide; organic compounds
Abstract:
... Recent experiments have highlighted the efficiency of nonprecious metal-based hybrid structures, such as g-C₃N₄/MoS₂ and g-C₃N₄/graphene for hydrogen evolution reaction (HER). This work focuses on the interface effects of such hybrid heterostructures that could lead to the enhanced catalytic activity of g-C₃N₄. We have concentrated on the hybrid electrocatalysts with the architecture g-C₃N₄/X (X = ...
DOI:
10.1021/acs.jpcc.9b11982

72. Activation of persulfate by CoO nanoparticles loaded on 3D mesoporous carbon nitride (CoO@meso-CN) for the degradation of methylene blue (MB)

Author:
Thanh Binh Nguyen; Ruey-an Doong; C.P. Huang; Chiu-Wen Chen; Cheng-Di Dong
Source:
Science of the total environment 2019 v.675 pp. 531-541
ISSN:
0048-9697
Subject:
carbon nitride; catalysts; catalytic activity; cobalt; cobalt oxide; high performance liquid chromatography; leaching; methylene blue; nanoparticles; pH; porous media; remediation; surface area; tandem mass spectrometry; toxic substances
Abstract:
... A simple and facile synthesis method is developed for the fabrication of CoO loaded ordered mesoporous carbon nitride (CoO@meso-CN) composites, at various CoO loadings, and used, for the first time, to activate persulfate (PS) for methylene blue (MB) degradation. The interfacial interaction between the ultrafine CoO nanoparticles, immobilized by high surface area, regular mesopores, and graphitic ...
DOI:
10.1016/j.scitotenv.2019.04.230

73. Building Up a Picture of the Electrocatalytic Nitrogen Reduction Activity of Transition Metal Single-Atom Catalysts

Author:
Xin Liu; Yan Jiao; Yao Zheng; Mietek Jaroniec; Shi-Zhang Qiao
Source:
Journal of the American Chemical Society 2019 v.141 no.24 pp. 9664-9672
ISSN:
1520-5126
Subject:
adsorption; ammonia; carbon; carbon nitride; catalysts; catalytic activity; density functional theory; electrochemistry; energy; hydrogen production; ligands; nitrogen; screening
Abstract:
... The lack of chemical understanding and efficient catalysts impedes the development of electrocatalytic nitrogen reduction reaction (eNRR) for ammonia production. In this work, we employed density functional theory calculations to build up a picture (activity trends, electronic origins, and design strategies) of single-atom catalysts (SACs) supported on nitrogen-doped carbons as eNRR electrocatalys ...
DOI:
10.1021/jacs.9b03811

74. Carbon nitride supported Ni₀.₅Co₀.₅O nanoparticles with strong interfacial interaction to enhance the hydrolysis of ammonia borane

Author:
Yunpeng Shang; Kun Feng; Yu Wang; Xuhui Sun; Jun Zhong
Source:
RSC advances 2019 v.9 no.20 pp. 11552-11557
ISSN:
2046-2069
Subject:
X-ray absorption spectroscopy; ambient temperature; ammonia; carbon; carbon nitride; catalysts; catalytic activity; fuel cells; hydrogen; hydrolysis; lighting; nanoparticles; nitric acid; nitrogen
Abstract:
... Ammonia borane (AB) is an ideal hydrogen-storage material for fuel cells but its application has been strongly limited by using rare noble-metal-based catalysts. Here we have prepared a hybrid material of Ni₀.₅Co₀.₅O nanoparticles on nitric-acid treated carbon nitride (NCN) for the hydrolysis of AB. The Ni₀.₅Co₀.₅O-NCN catalyst achieves a high total turnover frequency (TOF) value of 76.1 (H₂) mol ...
DOI:
10.1039/c9ra01743g

75. Complete degradation of ciprofloxacin over g-C3N4-iron oxide composite via heterogeneous dark Fenton reaction

Author:
Qiqi Ding; Frank L.Y. Lam; Xijun Hu
Source:
Journal of environmental management 2019 v.244 pp. 23-32
ISSN:
0301-4797
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; active sites; carbon nitride; catalysts; catalytic activity; ciprofloxacin; graphene; hydrogen peroxide; industrial applications; iron; irradiation; leaching; mineralization; nanoparticles; nitrogen; pH; pollutants; surface area; transmission electron microscopy; trapping
Abstract:
... Graphitic carbon nitride (g-C₃N₄) supported iron oxide (CN@IO) composite was first fabricated via synthesizing g-C₃N₄ in-situ onto iron oxide. The fabricated CN@IO composite was characterized by several techniques including XRD, XPS, TEM and nitrogen adsorption-desorption analysis. This composite was then used as a catalyst for the dark Fenton oxidative degradation of ciprofloxacin (CIP). Results ...
DOI:
10.1016/j.jenvman.2019.05.035

76. Cu@g-C₃N₄: An Efficient Single-Atom Electrocatalyst for NO Electrochemical Reduction with Suppressed Hydrogen Evolution

Author:
Qian Wu; Wei Wei; Xingshuai Lv; Yuanyuan Wang; Baibiao Huang; Ying Dai
Source:
Journal of physical chemistry 2019 v.123 no.51 pp. 31043-31049
ISSN:
1932-7455
Subject:
ammonia; carbon nitride; catalysts; catalytic activity; copper; electrochemistry; graphene; hydrogen production; nitric oxide; physical chemistry; pollutants; pollution
Abstract:
... Nitric oxide electroreduction reaction (NOER) is one of the most attractive routes for ammonia synthesis and pollutant treatment. However, the current research efforts toward the NOER mainly focus on metal surface catalysts, while low-cost and high-efficiency single-atom catalysts (SACs) are rarely explored. Herein, using first-principles computations, we systematically investigate the NOER perfor ...
DOI:
10.1021/acs.jpcc.9b08827

77. Direct Conversion of Acetylene and 1,2-Dichloroethane to Vinyl Chloride Monomer over a Supported Carbon Nitride Catalyst: Tunable Activity Controlled by the Synthesis Temperature

Author:
Xi Sun; Xi Liu; Yucai Qin; Li Qiang; Yu-Peng He; Dangsheng Su; Lijuan Song; Zhaolin Sun
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.14 pp. 5404-5413
ISSN:
1520-5045
Subject:
X-ray photoelectron spectroscopy; carbon; carbon nitride; catalysts; catalytic activity; computational methodology; desorption; energy; ethylene dichloride; organochlorine compounds; polymerization; process design; temperature; transmission electron microscopy; vinyl chloride
Abstract:
... A carbon supported carbon nitride is reported here as a catalyst for the direct conversion of acetylene and 1,2-dichloroethane (EDC) to vinyl chloride monomer (VCM). We demonstrate that increasing the synthesis temperature of the carbon nitride material leads to a catalyst with higher catalytic activity toward VCM production. The catalysts were characterized by acetylene temperature-programmed des ...
DOI:
10.1021/acs.iecr.8b05942

78. Efficient piezo-catalytic hydrogen peroxide production from water and oxygen over graphitic carbon nitride

Author:
Kefu Wang; Dengkui Shao; Ling Zhang; Yuanyi Zhou; Haipeng Wang; Wenzhong Wang
Source:
Journal of materials chemistry A 2019 v.7 no.35 pp. 20383-20389
ISSN:
2050-7496
Subject:
carbon nitride; catalysts; catalytic activity; crystal structure; electrons; energy; gold; graphene; hydrogen peroxide; microscopy; oxygen; potassium permanganate; ultrasonics; vibration
Abstract:
... Design of a green and sustainable approach for H₂O₂ synthesis is a meaningful subject. Herein, we propose a piezo-catalytic method for H₂O₂ production by utilizing a metal-free g-C₃N₄ catalyst, which has high activity for generating H₂O₂ only from H₂O and O₂ under ultrasonic vibration by means of converting mechanical energy to chemical energy. Without any organics, the ultrasonic-driven generatio ...
DOI:
10.1039/c9ta06251c

79. Exfoliation of Graphitic Carbon Nitride for Enhanced Oxidative Desulfurization: A Facile and General Strategy

Author:
Ganchang Lei; Yanning Cao; Wentao Zhao; Zhaojin Dai; Lijuan Shen; Yihong Xiao; Lilong Jiang
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.5 pp. 4941-4950
ISSN:
2168-0485
Subject:
active sites; air; carbon nitride; catalysts; catalytic activity; desulfurization; durability; graphene; heat treatment; hydrogen sulfide; mass transfer; nanosheets; oxidation; surface area
Abstract:
... A series of graphitic carbon nitride (CN) in the form of nanosheets with porous structure have been prepared through thermal treatment of bulk CN in air. Compared with the bulk counterpart, the as-generated holey CN nanosheets are larger in specific surface area. Endowed with more active sites and enhanced mass transport ability, the latter display catalytic performance substantially superior to t ...
DOI:
10.1021/acssuschemeng.8b05553

80. Facile solution synthesis of FeNₓ atom clusters supported on nitrogen-enriched graphene carbon aerogels with superb electrocatalytic performance toward the oxygen reduction reaction

Author:
Min Hong; Jianhang Nie; Xiaohua Zhang; Pengfei Zhang; Qin Meng; Junlin Huang; Zhenyang Xu; Cuicui Du; Jinhua Chen
Source:
Journal of materials chemistry A 2019 v.7 no.44 pp. 25557-25566
ISSN:
2050-7496
Subject:
aerogels; carbon nitride; catalysts; catalytic activity; fuel cells; graphene; graphene oxide; iron; methanol; nanomaterials; platinum; thiocyanates
Abstract:
... The development of non-platinum catalysts for the oxygen reduction reaction (ORR) to substitute state-of-the-art but expensive Pt catalysts is essential for the development and practical application of fuel cells. Here, combining the self-assembly and coordination interaction between graphene oxide (GO) with g-C₃N₄ and iron phthalocyanine (FePc), FeNₓ atom clusters supported on three-dimensional p ...
DOI:
10.1039/c9ta09104a

81. Forming a B[sbnd]B bond in boron carbon nitride composite: A way for metal free electrocatalyst for oxygen reduction reaction in alkaline medium

Author:
Phiralang Marbaniang; Sagar Ingavale; Divya Catherin; Niranjan Ramgir; Anita Swami; Bhalchandra Kakade
Source:
Journal of catalysis 2019 v.378 pp. 104-112
ISSN:
0021-9517
Subject:
Lewis acids; adsorption; boron; carbon nitride; catalysts; catalytic activity; cathodes; electrochemistry; energy; fuel cells; nanosheets; oxygen; platinum; soot
Abstract:
... Unmanageable of oxygen electrochemistry on cathode side of fuel cells creates a major hindrance to designing a cell device. Effectively, Platinum alone cannot afford the oxygen reduction reaction (ORR) due to several worries such as unaffordable cost, stability, scarcity and intermediate tolerance etc. that would hurdle the development of fuel cell technology. In order to demonstrate similar effor ...
DOI:
10.1016/j.jcat.2019.08.021

82. Highly effective and green microwave catalytic oxidation degradation of nitrophenols over Bi2O2CO3 based composites without extra chemical additives

Author:
Yin Qiu; Jicheng Zhou
Source:
Chemosphere 2019 v.214 pp. 319-329
ISSN:
0045-6535
Subject:
additives; carbon; carbon nitride; catalysts; catalytic activity; heavy metals; industrial effluents; irradiation; medicine; nitrophenols; oxidation; pollution; silicon carbide; stomach; superoxide anion; wastewater
Abstract:
... A novel treatment technology of microwave catalytic oxidation degradation (MCOD) for nitrophenols (NPs) wastewater over green catalysts of gC₃N₄Bi₂O₂CO₃ and SiCBi₂O₂CO₃ was developed. This process is eco-friendly because the only used Bi₂O₂CO₃ is non-toxic (which can be used as stomach medicine), and no heavy metal pollution exists in g-C₃N₄ and SiC. The results show that these Bi₂O₂CO₃ based comp ...
DOI:
10.1016/j.chemosphere.2018.09.125

83. In-situ deposition of gold nanoparticles onto polydopamine-decorated g-C3N4 for highly efficient reduction of nitroaromatics in environmental water purification

Author:
Lei Qin; Danlian Huang; Piao Xu; Guangming Zeng; Cui Lai; Yukui Fu; Huan Yi; Bisheng Li; Chen Zhang; Min Cheng; Chengyun Zhou; Xiaofeng Wen
Source:
Journal of colloid and interface science 2019 v.534 pp. 357-369
ISSN:
0021-9797
Subject:
borohydrides; carbon nitride; catalysts; catalytic activity; gold; methyl orange; nanogold; nitroaromatic compounds; nitrophenols; reducing agents; remediation; stabilizers; water purification
Abstract:
... A green synthesized gold-catalyst (PDA-g-C3N4/Au) for highly efficient reduction of nitroaromatics by NaBH4 was proposed. Polydopamine (PDA) served as the reductant and stabilizer for AuNPs reduction, avoiding the use of chemical reductant and stabilizer that may result in secondary contamination. g-C3N4 not only acted as the support but also provided compatibility for AuNPs deposition, enhancing ...
DOI:
10.1016/j.jcis.2018.09.051

84. Magnetic cobalt-embedded carbon nitride composite derived from one-dimensional coordination polymer as an efficient catalyst for activating oxone to degrade methyltheobromine in water

Author:
Meng-Wei Zhang; Fei Yee Yeoh; Yunchen Du; Kun-Yi Andrew Lin
Source:
Science of the total environment 2019 v.678 pp. 466-475
ISSN:
0048-9697
Subject:
activation energy; carbon; carbon nitride; catalysts; catalytic activity; cobalt; cobalt oxide; coordination polymers; magnetism; nanoparticles; nitrogen; wastewater
Abstract:
... As methyltheobromine (MTB) has been increasingly detected in wastewater, it would be necessary to develop more intensive and effective approaches to remove MTB. As Co species immobilized on carbonaceous materials appears as a promising catalyst, doping carbon with nitrogen has been also validated to significantly enhance catalytic activities for Oxone activation. Therefore, it is desired to develo ...
DOI:
10.1016/j.scitotenv.2019.04.295

85. Magnetically Separable Nanospherical g-C₃N₄@Fe₃O₄ as a Recyclable Material for Chromium Adsorption and Visible-Light-Driven Catalytic Reduction of Aromatic Nitro Compounds

Author:
A. Santhana Krishna Kumar; Jyun-Guo You; Wei-Bin Tseng; G. D. Dwivedi; N. Rajesh; Shiuh-Jen Jiang; Wei-Lung Tseng
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.7 pp. 6662-6671
ISSN:
2168-0485
Subject:
absorption; adsorbents; adsorption; aqueous solutions; carbon nitride; catalysts; catalytic activity; chemical composition; chromium; crystal structure; dispersibility; graphene; magnetic fields; magnetic properties; magnetite; models; nanocomposites; nanoparticles; nitroanilines; sludge; soil; sorption isotherms
Abstract:
... Graphite-like graphitic carbon nitride (g-C₃N₄) has gained considerable interest in the past few years. However, merely a few studies have been undertaken regarding the application of g-C₃N₄ for metal adsorption and visible-light-driven reduction of aromatic nitro compounds. Here, we describe a versatile method for the preparation of g-C₃N₄ nanocomposite decorated with magnetite nanoparticles (g-C ...
DOI:
10.1021/acssuschemeng.8b05727

86. Metal-free Catalysts of Graphitic Carbon Nitride–Covalent Organic Frameworks for Efficient Pollutant Destruction in Water

Author:
Yunjin Yao; Yi Hu; Huanhuan Hu; Luwang Chen; Maojing Yu; Mengxue Gao; Shaobin Wang
Source:
Journal of colloid and interface science 2019 pp. -
ISSN:
0021-9797
Subject:
acid orange 7; anions; carbon nitride; carbonates; catalysts; catalytic activity; chlorides; crystals; dicyandiamide; dominant species; electron paramagnetic resonance spectroscopy; electron transfer; formates; graphene; melamine; nitrogen; nitrogen content; oxidants; oxidation; pH; pollutants; pyrolysis; remediation; scanning electron microscopy; singlet oxygen; sulfates; temperature; urea
Abstract:
... Novel metal-free catalysts via integration of covalent organic framework (COF) and graphitic carbon nitride (g-C3N4@COF) with a high graphitization degree and nitrogen content were fabricated and exhibited an outstanding activity in a wide pH range for peroxymonosulfate (PMS)-driven oxidation of refractory organic pollutants in water. Scanning electron microscopy images showed many aggregated COFs ...
DOI:
10.1016/j.jcis.2019.07.002

87. Metalated carbon nitrides as base catalysts for efficient catalytic hydrolysis of carbonyl sulfide

Author:
Fangsong Guo; Shanrong Li; Yidong Hou; Junkang Xu; Sen Lin; Xinchen Wang
Source:
Chemical communications 2019 v.55 no.75 pp. 11259-11262
ISSN:
1364-548X
Subject:
carbon nitride; carbonyl sulfide; catalysts; catalytic activity; hydrolysis; metal ions
Abstract:
... A new type of base catalyst was designed and prepared by metalation of carbon nitrides with alkali metal ions. The as-prepared metalated carbon nitride composites showed enhanced basicity and efficient catalytic hydrolysis of carbonyl sulfide. The results of this study demonstrate that the metalation of carbon nitrides holds great promise for base catalysis applications. ...
DOI:
10.1039/c9cc06246g

88. Novel NiPt alloy nanoparticle decorated 2D layered g-C₃N₄ nanosheets: a highly efficient catalyst for hydrogen generation from hydrous hydrazine

Author:
Chao Wan; Lin Sun; Lixin Xu; Dang-guo Cheng; Fengqiu Chen; Xiaoli Zhan; Yongrong Yang
Source:
Journal of materials chemistry A 2019 v.7 no.15 pp. 8798-8804
ISSN:
2050-7496
Subject:
alloy nanoparticles; carbon nitride; catalysts; catalytic activity; chemical reduction; graphene; hydrazine; hydrogen; hydrogen production; nanosheets
Abstract:
... Novel NiPt/graphitic carbon nitride nanosheets (g-C₃N₄ NSs) have been successfully constructed through a simple and facile wet chemical reduction approach. Interestingly, benefiting from the unique structure of g-C₃N₄ NSs and their strong interaction with NiPt, Ni₀.₆Pt₀.₄/g-C₃N₄ NSs demonstrate outstanding catalytic activity toward hydrogen generation from hydrous hydrazine, giving 100% H₂ selecti ...
DOI:
10.1039/c9ta01535c

89. Porous N–C catalyst synthesized by pyrolyzing g-C3N4 embedded in carbon as highly efficient oxygen reduction electrocatalysts for primary Zn-air battery

Author:
Li Zhang; Jing Xiong; Yuan-Hang Qin; Cun-Wen Wang
Source:
Carbon 2019 v.150 pp. 475-484
ISSN:
0008-6223
Subject:
batteries; carbon; carbon nitride; catalysts; catalytic activity; cathodes; electrochemistry; glucose; iron; methanol; oxygen; platinum; porosity; pyrolysis; surface area
Abstract:
... Nitrogen-doped carbon (N–C) materials are promising low-cost catalysts for oxygen reduction reaction (ORR). However, the commonly used route for N–C synthesis, viz., the high-temperature pyrolysis of N- and C-containing precursors, usually results in a great loss of N-containing species determining the ORR catalytic performance. Herein, porous N–C materials are synthesized by using g-C3N4 embedded ...
DOI:
10.1016/j.carbon.2019.05.044

90. Porous nanosheets of carbon-conjugated graphitic carbon nitride for the oxidation of H2S to elemental sulfur

Author:
Ganchang Lei; Zhaojin Dai; Zhangjia Fan; Xiaohai Zheng; Yanning Cao; Lijuan Shen; Yihong Xiao; Chaktong Au; Lilong Jiang
Source:
Carbon 2019 v.155 pp. 204-214
ISSN:
0008-6223
Subject:
carbon nitride; catalysts; catalytic activity; cetyltrimethylammonium bromide; desulfurization; durability; gases; graphene; hydrogen sulfide; industrial applications; nanosheets; oxidation; sulfur; surface area; urea
Abstract:
... Graphitic carbon nitride (CN) has been reported as an emerging non-metallic catalyst for the oxidation of H₂S to elemental sulfur, but its industrial application is hampered by the unsatisfactory catalytic activity. Herein, we report for the first time a facile bottom-up approach to synthesize porous nanosheets of in-plane carbon-conjugated CN (PCNUC) using cetyltrimethylammonium bromide (CTAB) an ...
DOI:
10.1016/j.carbon.2019.08.052

91. Prussian blue analogues-derived carbon composite with cobalt nanoparticles as an efficient bifunctional electrocatalyst for oxygen reduction and hydrogen evolution

Author:
Dengke Zhao; Jiale Dai; Ni Zhou; Nan Wang; Xinwen Peng; Yunpeng Qu; Ligui Li
Source:
Carbon 2019 v.142 pp. 196-205
ISSN:
0008-6223
Subject:
carbon nitride; catalysts; catalytic activity; cobalt; colloids; electrochemistry; electrolytes; graphene; graphene oxide; hydrogen production; immunity; nanoparticles; nitrogen; oxygen; porous media; renewable energy sources; silica; surface area
Abstract:
... Oxygen reduction reaction and hydrogen evolution reaction are two key reactions involved in several renewable energy technologies. Herein, a nonprecious bifunctional electrocatalyst for oxygen reduction reaction and hydrogen evolution reaction is facilely synthesized through directly pyrolyzing the mixture of Prussian blue analogues, graphene oxide and graphitic carbon nitride in the presence of s ...
DOI:
10.1016/j.carbon.2018.10.057

92. Single-Atom Mn–N₄ Site-Catalyzed Peroxone Reaction for the Efficient Production of Hydroxyl Radicals in an Acidic Solution

Author:
Zhuang Guo; Yongbing Xie; Jiadong Xiao; Zhi-Jian Zhao; Yuxian Wang; Zhaomeng Xu; Yi Zhang; Lichang Yin; Hongbin Cao; Jinlong Gong
Source:
Journal of the American Chemical Society 2019 v.141 no.30 pp. 12005-12010
ISSN:
1520-5126
Subject:
active sites; carbon nitride; catalysts; catalytic activity; graphene; hydrogen peroxide; hydroxyl radicals; manganese; oxidation; ozone; pH; water pollution
Abstract:
... The peroxone reaction between O₃ and H₂O₂ has been deemed a promising technology to resolve the increasingly serious water pollution problem by virtue of the generation of superactive hydroxyl radicals (•OH), but it suffers greatly from an extremely limited reaction rate constant under acidic conditions (ca. less than 0.1 M–¹ s–¹ at pH 3). This article describes a heterogeneous catalyst composed o ...
DOI:
10.1021/jacs.9b04569

93. Space-Confined Strategy to Fe₇C₃ Nanoparticles Wrapped in Porous Fe-/N-Doped Carbon Nanosheets for Efficient Oxygen Electrocatalysis

Author:
Yanli Niu; Xue Teng; Jianying Wang; Yangyang Liu; Lixia Guo; Wenjiao Song; Zuofeng Chen
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.15 pp. 13576-13583
ISSN:
2168-0485
Subject:
air; batteries; carbon; carbon nitride; catalysts; catalytic activity; cathodes; dopamine; electric potential difference; electrochemistry; energy conversion; iron; nanoparticles; nanosheets; oxygen; oxygen production; polymerization; pyrolysis
Abstract:
... The development of economical, high-efficiency, and robust bifunctional oxygen electrocatalysts toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is highly desirable but challenging. Herein, we develop a space-confined strategy with a sacrificial template for preparing Fe₇C₃ nanoparticles embedded in an interconnected porous graphene-like Fe-/N-doped carbon matrix (Fe ...
DOI:
10.1021/acssuschemeng.9b03794

94. Sulfonated graphitic carbon nitride as a highly selective and efficient heterogeneous catalyst for the conversion of biomass-derived saccharides to 5-hydroxymethylfurfural in green solvents

Author:
Tripti Chhabra; Ashish Bahuguna; Sandeep Singh Dhankhar; C. M. Nagaraja; Venkata Krishnan
Source:
Green chemistry 2019 v.21 no.21 pp. 6012-6026
ISSN:
1463-9270
Subject:
Bronsted acids; biodiesel; biomass; carbon nitride; carbonates; catalysts; catalytic activity; cellobiose; energy; ethanol; fructose; glucose; green chemistry; hydroxymethylfurfural; isopropyl alcohol; solvents; starch; sucrose; temperature; value added; value-added products
Abstract:
... The catalytic conversion of biomass-derived chemicals to value added products is currently a topic of high importance, as it addresses the problems pertaining to both energy and the environment. In this regard, it is pertinent to design and develop catalysts using low cost and Earth abundant materials, which could perform these biomass conversion reactions in environment friendly green solvents. K ...
DOI:
10.1039/c9gc02120e

95. Synergy effects of basic graphitic-C3N4 over acidic Al2O3 for a liquid-phase decarboxylation of naphthenic acids

Author:
Jaeyeong Park; Faisal Zafar; Cheol Hyun Kim; Jeongmin Choi; Jong Wook Bae
Source:
Fuel processing technology 2019 v.184 pp. 36-44
ISSN:
0378-3820
Subject:
Lewis acids; acidity; active sites; adsorption; aluminum oxide; carbon; carbon nitride; catalysts; catalytic activity; decarboxylation; models; nanoparticles; naphthenates; petroleum; porous media; thermal stability
Abstract:
... Synergy effects of a basic graphitic-carbon nitride (g-C3N4) supported on a Lewis acidic γ-Al2O3 (Al@CN) were investigated to remove naphthenic acids (NAs) in a highly acidic model crude oil (dodecane used as model component) through a liquid-phase decarboxylation, where a novel bifunctional Al@CN catalyst effectively reduced the acidity of the model crude oil. Among the well-known elimination met ...
DOI:
10.1016/j.fuproc.2018.11.001

96. Visible-light-driven activation of persulfate over cyano and hydroxyl group co-modified mesoporous g-C₃N₄ for boosting bisphenol A degradation

Author:
Sai Zhang; Shuang Song; Pengcheng Gu; Ran Ma; Dongli Wei; Guixia Zhao; Tao Wen; Riffat Jehan; Baowei Hu; Xiangke Wang
Source:
Journal of materials chemistry A 2019 v.7 no.10 pp. 5552-5560
ISSN:
2050-7496
Subject:
bisphenol A; carbon nitride; catalysts; catalytic activity; energy; engineering; free radicals; light; moieties; oxidants; porous media; sulfates; water pollution
Abstract:
... In this work, structure-deficient mesoporous g-C₃N₄ (DMCN) was fabricated via a facile hard template approach with water-bath aging pretreatment. The in situ introduced cyano groups (–CN) and hydroxyl groups (–OH) effectively modulated the energy levels, improved visible light absorption, and meanwhile served as strong electron-withdrawing groups, promoting the efficient separation and transfer o ...
DOI:
10.1039/c9ta00339h

97. A facile approach to constructing Pd@PCN–Se nano-composite catalysts for selective alcohol oxidation reactions

Author:
Kuanhong Cao; Xin Deng; Tian Chen; Qitao Zhang; Lei Yu
Source:
Journal of materials chemistry A 2019 v.7 no.18 pp. 10918-10923
ISSN:
2050-7496
Subject:
active sites; carbon nitride; catalysts; catalytic activity; nanocomposites; nanoparticles; oxidation; palladium; polymers; porous media; selenium; surface area
Abstract:
... By using selenium as the structure-directing agent, Se-incorporated polymeric carbon nitride (PCN–Se) was prepared for the first time and could be used as a superexcellent support for Pd nanoparticles (NPs). A trace amount of Se dopant (0.01 wt%) was found to play an unexpectedly vital role in increasing the materials' surface area and total mesoporous volume by 4.5 and 2 times respectively, so th ...
DOI:
10.1039/c9ta00846b

98. g-C₃N₄ - Singlet Oxygen Made Easy for Organic Synthesis: Scope and Limitations

Author:
Irene Camussi; Barbara Mannucci; Andrea Speltini; Antonella Profumo; Chiara Milanese; Lorenzo Malavasi; Paolo Quadrelli
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.9 pp. 8176-8182
ISSN:
2168-0485
Subject:
alkenes; carbon nitride; catalysts; catalytic activity; chemoselectivity; oxidation; photochemistry; singlet oxygen; value added
Abstract:
... Oxidized g-C₃N₄ displays very good catalytic performances in the generation of ¹O₂ under photochemical conditions. The hetero-Diels–Alder and ene reactions were conducted on a variety of dienes and alkenes showing a general ability of oxidized g-C₃N₄ to promote chemoselective and unselective oxidative processes in strong dependence from the substrates. The results offer a good panorama of the abil ...
DOI:
10.1021/acssuschemeng.8b06164

99. A universal route to N-coordinated metals anchored on porous carbon nanosheets for highly efficient oxygen electrochemistry

Author:
Jin-Tao Ren; Zhong-Yong Yuan
Source:
Journal of materials chemistry A 2019 v.7 no.22 pp. 13591-13601
ISSN:
2050-7496
Subject:
air; batteries; carbon nitride; catalysts; catalytic activity; cathodes; cobalt; copper; copper nanoparticles; cost effectiveness; durability; electrochemistry; energy conversion; graphene; iron; manganese; molybdenum; nanosheets; nickel; oxygen; polyacrylonitrile; tin
Abstract:
... Rational design and preparation of economical, high-efficiency, and robust electrocatalysts for the reversible oxygen reduction and evolution reactions to substitute noble-metal electrocatalysts are significantly vital for the development of electrocatalytic energy conversion technologies. Metal modified N-doped carbon materials have attracted tremendous interest due to the evidently improved acti ...
DOI:
10.1039/c9ta03300a

100. Biomass based iron and nitrogen co-doped 3D porous carbon as an efficient oxygen reduction catalyst

Author:
Zhaoquan Xu; Junhong Ma; Minhui Shi; Yahong Xie; Chao Feng
Source:
Journal of colloid and interface science 2018 v.523 pp. 144-150
ISSN:
0021-9797
Subject:
active sites; biomass; carbon nitride; catalysts; catalytic activity; cost effectiveness; electrochemistry; graphene; iron; methanol; nitrogen; oxygen; pyrolysis; surface area; synthetic products
Abstract:
... An iron and nitrogen co-doped 3D porous carbon catalyst with high performance for oxygen reduction reaction (ORR) is produced by pyrolysis. The precursor is a mixture of red date, ferrous (Ⅱ) acetate, and graphitic carbon nitride (g-C₃N₄). g-C₃N₄ is the nitrogen source and also the sacrificial template, which plays a key role in the formation of a porous nitrogen rich carbon structure with high su ...
DOI:
10.1016/j.jcis.2018.03.092