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1. Removal behavior and mechanisms of Cd(II) by a novel MnS loaded functional biochar: Influence of oxygenation

Author:
Fan, Zixi; Zhang, Qian; Li, Meng; Sang, Wenjiao; Qiu, Yue; Wei, Xiaonan; Hao, Huiru
Source:
Journal of cleaner production 2020 v.256 pp. 120672
ISSN:
0959-6526
Subject:
manganese oxides,   etc   ; adsorption; biochar; bran; cadmium; cadmium sulfide; manganese; pH; redox potential; sorbents; temperature;     Show all 11 Subjects
Abstract:
... Porous functional biochar (fBC) from mill bran was fabricated and used as a supporting agent for loading manganese sulfide (MnS). The manganese sulfide loaded functional biochar (MnS-fBC) composite’s physicochemical properties and Cd(II) removal performance were examined. Various adsorption parameters such as pH, initial Cd(II) concentration, biochar dosage and temperature were adopted to examine ...
DOI:
10.1016/j.jclepro.2020.120672

2. Analysis of lead forms and transition in agricultural soil by nano-fluorescence method

Author:
Liu, Shuyu; Ni, Lv; Chen, Wenli; Wang, Jiangli; Ma, Fang
Source:
Journal of hazardous materials 2020 v.389 pp. 121469
ISSN:
0304-3894
Subject:
manganese oxides,   etc   ; agricultural soils; heavy metals; humic acids; lead; nanogold; nanorods; physicochemical properties; soil properties;     Show all 9 Subjects
Abstract:
... The physicochemical properties of gold nanorods were used to develop many methods and techniques of detecting heavy metals recently. In this paper, the feasibility of gold nanorods was studied to detect metal lead in agricultural soil. The effects of soil properties on the form change of lead in soil were explored by gold nanorod detection technology. The results showed that the humic acid signifi ...
DOI:
10.1016/j.jhazmat.2019.121469

3. Spatio-temporal distribution and transformation of 17α- and 17β-estradiol in sterilized soil: A column experiment

Author:
Yu, Weiwei; Du, Banghao; Fan, Gongduan; Yang, Shuo; Yang, Lun; Zhang, Minne
Source:
Journal of hazardous materials 2020 v.389 pp. 122092
ISSN:
0304-3894
Subject:
manganese oxides,   etc   ; estradiol; iron; irrigation; isomers; oxidation; soil; soil sampling; soil sterilization; sorption; spatial distribution;     Show all 11 Subjects
Abstract:
... The environmental behaviors of steroid estrogens (SEs) associated with land irrigation and application are of critical concern worldwide. Understanding the spatio-temporal distribution and transformation process of these estrogenic compounds in soil is greatly significant. In this study, laboratory soil column experiments were conducted to investigate and explore the migration and abiotic transfor ...
DOI:
10.1016/j.jhazmat.2020.122092

4. Freeze-drying preparation of MnOx/graphene nanocomposite as anode material for highly reversible lithium storage

Author:
Ma, Chao; Sun, Rui; Chen, Yan; Sun, Jiyu; Ji, Hongmei; Li, Yuhong; Yang, Gang
Source:
Journal of materials science 2020 v.55 no.13 pp. 5545-5553
ISSN:
0022-2461
Subject:
manganese oxides,   etc   ; anodes; buffers; electrolytes; freeze drying; graphene; graphene oxide; grinding; lithium; nanocomposites; nanoparticles;     Show all 11 Subjects
Abstract:
... Manganese oxides (MnOₓ) as potential anode materials need support by porous carbonaceous materials to avoid its large volume change, pulverization and poor conductivity during lithiation and delithiation. However, the homogeneous distribution of MnOₓ particles onto graphene sheets (rGO) is still questionable, because both components have different densities and activity in solution. Freeze-drying ...
DOI:
10.1007/s10853-020-04395-y

5. Interaction mechanism of dissolved Cr(VI) and manganite in the presence of goethite coating

Author:
Luo, Yao; Ding, Jiayu; Hai, Ju; Tan, Wenfeng; Hao, Rong; Qiu, Guohong
Source:
Environmental pollution 2020 v.260 pp. 114046
ISSN:
0269-7491
Subject:
manganese oxides,   etc   ; adsorption; chromium; coatings; goethite; iron; iron oxides; pH; remediation; soil; toxicity;     Show all 11 Subjects
Abstract:
... Hexavalent chromium has aroused a series of environmental concerns due to its high mobility and toxicity. Iron and manganese oxides usually coexist in the environments and influence the speciation and geochemical cycling of chromium. However, the interaction mechanism of iron-manganese oxides with dissolved Cr(VI) remains largely unknown. In this work, the interaction processes of dissolved Cr(VI) ...
DOI:
10.1016/j.envpol.2020.114046

6. Promotional effects of nitrogen doping on catalytic performance over manganese-containing semi-coke catalysts for the NH3-SCR at low temperatures

Author:
Yao, Lu; Liu, Qingcai; Mossin, Susanne; Nielsen, David; Kong, Ming; Jiang, Lijun; Yang, Jie; Ren, Shan; Wen, Juan
Source:
Journal of hazardous materials 2020 v.387 pp. 121704
ISSN:
0304-3894
Subject:
manganese oxides,   etc   ; Lewis acids; adsorption; ammonia; catalysts; catalytic activity; electrons; manganese; nitrates; nitrogen; oxidation; oxygen; temperature;     Show all 13 Subjects
Abstract:
... A series of nitrogen-doped MnOₓ/semi-coke catalysts were studied for low-temperature (LT) de-NOₓ performance in the NH₃-SCR reaction. Changes in morphology, structure, and surface chemistry of the semi-coke catalysts were systematically investigated to analyze the promotional effects of nitrogen doping on catalytic performance. The catalytic activity of ASC-10U10 Mn was found to be enhanced signif ...
DOI:
10.1016/j.jhazmat.2019.121704

7. The effect of low-temperature biochar and its non-pyrolyzed composted biosolids source on the geochemical fractionation of Pb and Cd in calcareous river sediments

Author:
Mitchell, Kerry; Mendoza-González, Celeste Viridiana; Ramos-Gómez, Magdalena Samanta; Yamamoto-Flores, Laura; Guerrero-Barrera, Alma Lilian; Macias-Medrano, Roberto; Avelar-González, Francisco Javier
Source:
Environmental earth sciences 2020 v.79 no.7 pp. 164
ISSN:
1866-6280
Subject:
manganese oxides,   etc   ; biochar; biosolids; cadmium; fractionation; iron oxides; lead; organic matter; pH; rivers; sediments; temperature;     Show all 12 Subjects
Abstract:
... Single extraction and sequential extraction assays were used to compare the effect of low-temperature biochar and its non-pyrolyzed composted biosolids on Pb and Cd mobility in the buffered conditions of calcareous river sediments. Results showed that amendment reduced the mobility of both metals, though under higher pH conditions, the effect of the non-pyrolyzed composted biosolids on the mobilit ...
DOI:
10.1007/s12665-020-08908-5

8. Enhancing the interfacial stability of P2-type cathodes by polydopamine-derived carbon coating for achieving performance improvement

Author:
Xia, Jiuyang; Wu, Wenwei; Fang, Kaixin; Wu, Xuehang
Source:
Carbon 2020 v.157 pp. 693-702
ISSN:
0008-6223
Subject:
manganese oxides,   etc   ; batteries; byproducts; carbon; cathodes; coatings; electrochemistry; electrolytes; nickel; sodium; sodium carbonate; sodium hydroxide;     Show all 12 Subjects
Abstract:
... P2-type sodium nickel manganese oxides are considered as promising high-energy-density cathode materials for sodium-ion batteries. However, the interface of P2-type sodium nickel manganese oxides is susceptible to moisture during electrode fabrication process, leading to the occurrence of adverse effects. Herein, we demonstrate that the polydopamine-derived carbon coating is an effective strategy ...
DOI:
10.1016/j.carbon.2019.11.011

9. Enhanced Ion Conduction via Epitaxially Polymerized Two-Dimensional Conducting Polymer for High-Performance Cathode in Zinc-Ion Batteries

Author:
Zang, Xiaoling; Wang, Xusheng; Liu, Haili; Ma, Xinlei; Wang, Weijian; Ji, Junhui; Chen, Jitao; Li, Rui; Xue, Mianqi
Source:
ACS applied materials & interfaces 2020 v.12 no.8 pp. 9347-9354
ISSN:
1944-8252
Subject:
manganese oxides,   etc   ; batteries; cathodes; electrochemistry; energy; grinding; liquids; nanosheets; polymerization; polymers; pyrroles;     Show all 11 Subjects
Abstract:
... Aqueous zinc-ion batteries (AZIBs) are one of the promising choices for the future large-scale grid energy storage, in which Mn-based cathode materials have the advantages of low cost and environmental friendliness. However, their capacity delivery and cycling stability are limited by the large bulk-induced incomplete zincation and structure pulverization. Here, we develop a strategy of epitaxial ...
DOI:
10.1021/acsami.9b22470

10. Mn3O4/Co(OH)2 cactus-type nanoarrays for high-energy-density asymmetric supercapacitors

Author:
Wang, Ya; Hao, Jiangyu; Li, Wenpo; Zuo, Xiuli; Xiang, Bin; Qiang, Yujie; Zou, Xuefeng; Tan, Bochuan; Hu, Qin; Chen, Feng
Source:
Journal of materials science 2020 v.55 no.2 pp. 724-737
ISSN:
0022-2461
Subject:
manganese oxides,   etc   ; capacitance; cobalt; electrodes; energy density; foams; graphene oxide; nanosheets; nickel;     Show all 9 Subjects
Abstract:
... A novel Mn₃O₄/Co(OH)₂ cactus-type nanoarrays were directly grown on nickel foam, by a simple two-step process, using an electrodeposition and a hydrothermal process. Mn₃O₄ particles were used as a backbone anchoring Co(OH)₂ to form a cactus-type nanoarray structure. Owing to the synergistic effect of Mn₃O₄ nanosheet arrays and Co(OH)₂, the as-obtained Mn₃O₄/Co(OH)₂ electrode displays an excellent ...
DOI:
10.1007/s10853-019-03998-4

11. Resistive switching behaviors and memory logic functions in single MnOₓ nanorod modulated by moisture

Author:
Zhou, Guangdong; Sun, Bai; Ren, Zhijun; Wang, Lidan; Xu, Cunyun; Wu, Bo; Li, Ping; Yao, Yanqing; Duan, Shukai
Source:
Chemical communications 2019 v.55 no.67 pp. 9915-9918
ISSN:
1364-548X
Subject:
manganese oxides,   etc   ; chemical reactions; nanorods; resistors;     Show all 4 Subjects
Abstract:
... A device with the lateral structure of Ag|MnOₓ|Ag was developed using a single MnOₓ nanorod. The device showed a typical resistor property under dry ambience, while it demonstrated the reversion between resistor and memristor under moisture ambience. Memory logic functions including logic gates and displays were feasible under the dual input of electric and moisture signals. ...
DOI:
10.1039/c9cc04069b

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

Author:
Chen, Congcong; Xie, Meng; Kong, Lingshuai; Lu, Wenhui; Feng, Zhenyu; Zhan, Jinhua
Source:
Journal of hazardous materials 2020 v.390 pp. 122146
ISSN:
0304-3894
Subject:
manganese oxides,   etc   ; 4-chlorophenol; batch systems; carbon nitride; catalysts; catalytic activity; filtration; hot water treatment; manganese; microstructure; nanosheets;     Show all 11 Subjects
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

13. In Situ Photodeposited Construction of Pt–CdS/g-C₃N₄–MnOₓ Composite Photocatalyst for Efficient Visible-Light-Driven Overall Water Splitting

Author:
Zhou, Xunfu; Fang, Yuxuan; Cai, Xin; Zhang, Shengsen; Yang, Siyuan; Wang, Hongqiang; Zhong, Xinhua; Fang, Yueping
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20579-20588
ISSN:
1944-8252
Subject:
manganese oxides,   etc   ; cadmium sulfide; carbon nitride; energy; hydrogen; hydrogen production; models; nanorods; nanosheets; oxygen production; photocatalysis; photocatalysts; solar energy;     Show all 13 Subjects
Abstract:
... For converting the renewable solar energy to hydrogen (H₂) energy by photocatalytic (PC) overall water splitting (OWS), visible-light-driven photocatalysts are especially desired. Herein, a model CdS/g-C₃N₄ photocatalyst with a type II heterojunction is first demonstrated via a facile coupling of g-C₃N₄ nanosheets and CdS nanorods. After being combined with in situ photodeposited 3 wt % Pt and 4 w ...
DOI:
10.1021/acsami.0c04241

14. ZnO/MnOₓ Nanoflowers for High-Performance Supercapacitor Electrodes

Author:
Samuel, Edmund; Joshi, Bhavana; Kim, Yong-il; Aldalbahi, Ali; Rahaman, Mostafizur; Yoon, Sam S.
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.9 pp. 3697-3708
ISSN:
2168-0485
Subject:
manganese oxides,   etc   ; capacitance; coatings; corolla; electric potential difference; electrochemical capacitors; electrochemistry; electrodes; energy density; nanocomposites; nanoflowers; nickel; zinc oxide;     Show all 13 Subjects
Abstract:
... A crystalline ZnO/MnOₓ nanoflower (NF) nanocomposite was deposited on Ni nanocones via an economical synthesis method in which the ZnO NFs were first synthesized, and MnOₓ was then deposited on the ZnO petals to form a heterostructured composite. The effect of the MnOₓ coating on the performance of the nanocomposite was analyzed by comparing the performance of supercapacitors employing ZnO and the ...
DOI:
10.1021/acssuschemeng.9b06796

15. Generating highly active Ni11(HPO3)8(OH)6/Mn3O4 catalyst for electrocatalytic hydrogen evolution reaction by electrochemical activation

Author:
Tan, Ya; Che, Qijun; Li, Qing
Source:
Journal of colloid and interface science 2020 v.560 pp. 714-721
ISSN:
0021-9797
Subject:
manganese oxides,   etc   ; catalysts; catalytic activity; cost effectiveness; electrochemistry; electrolytes; electron transfer; foams; hydrogen production; nanoparticles; nanowires; nickel; oxidation; platinum;     Show all 14 Subjects
Abstract:
... The design of electrocatalysts with cost-efficient, highly-efficient and stable for hydrogen evolution reaction (HER) is significant to alleviate energy crisis in the future. Herein, we prepared the Ni₁₁(HPO₃)₈(OH)₃/Mn₃O₄ (named as NiPi/Mn₃O₄) composite with crystalline/amorphous interface by electrochemical activation based on Ni₃P/MnOOH precursor. The precursor was synthesized by two-step method ...
DOI:
10.1016/j.jcis.2019.10.107

16. Simultaneous removal of As(III) and Cu(II) from real bottom ash leachates by manganese-oxidizing aerobic granular sludge: Performance and mechanisms

Author:
He, Zhanfei; Zhang, Qingying; Wei, Zhen; Zhu, Yinghong; Pan, Xiangliang
Source:
The Science of the total environment 2020 v.700 pp. 134510
ISSN:
0048-9697
Subject:
manganese oxides,   etc   ; arsenic; bacteria; batch systems; bottom ash; carbonates; chemical oxygen demand; copper; iron; leachates; manganese; oxidation; pH; sludge; wastewater;     Show all 15 Subjects
Abstract:
... Manganese-oxidizing aerobic granular sludge (Mn-AGS) is a novel extension of AGS technology to treat arsenic (As) in organic wastewater. In this study, Mn-AGS was first applied to treat real wastewater (bottom ash leachates) containing high levels of As(III) and Cu(II) in a sequencing batch reactor (SBR) for 91 days. Influent and effluent As(III), As(V), Cu(II), as well as pH and chemical oxygen d ...
DOI:
10.1016/j.scitotenv.2019.134510

17. Tunable Redox Temperature of a Co₃–ₓMnₓO₄ (0 ≤ x ≤ 3) Continuous Solid Solution for Thermochemical Energy Storage

Author:
Zaki, Abdelali; Carrasco, Javier; Bielsa, Daniel; Faik, Abdessamad
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7010-7020
ISSN:
1944-8252
Subject:
manganese oxides,   etc   ; cobalt; cobalt oxide; energy efficiency; enthalpy; heat; manganese; oxidation; power plants; temperature; thermal energy; thermal properties; toxicity;     Show all 13 Subjects
Abstract:
... Heat-storage technologies are well suited to improve the energy efficiency of power plants and the recovery of process heat. A good option for high storage capacities, especially at high temperatures, is storing thermal energy by reversible thermochemical reactions. In particular, the Co₃O₄/CoO and Mn₂O₃/Mn₃O₄ redox-active couples are known to be very promising systems. However, cost and toxicity ...
DOI:
10.1021/acsami.9b14369

18. Bi4NbO8Cl {001} nanosheets coupled with g-C3N4 as 2D/2D heterojunction for photocatalytic degradation and CO2 reduction

Author:
Xu, Yue; You, Yong; Huang, Hongwei; Guo, Yuxi; Zhang, Yihe
Source:
Journal of hazardous materials 2020 v.381 pp. 121159
ISSN:
0304-3894
Subject:
manganese oxides,   etc   ; bisphenol A; carbon dioxide; carbon monoxide; carbon nitride; energy; nanosheets; pH; photocatalysis; photocatalysts; synergism; tetracycline;     Show all 12 Subjects
Abstract:
... Photocatalytic activity is largely restricted by insufficient photoabsorption and intense recombination between charge carriers. Here, we first synthesized Bi4NbO8Cl nanosheets with {001} exposing facets by a molten-salt growth method, which shows largely promoted photocatalytic performance for the degradation of tetracycline (TC) and bisphenol A (BPA) in comparison with Bi4NbO8Cl particles obtain ...
DOI:
10.1016/j.jhazmat.2019.121159

19. Vinegar residue supported nanoscale zero-valent iron: Remediation of hexavalent chromium in soil

Author:
Pei, Guangpeng; Zhu, Yuen; Wen, Junguo; Pei, Yanxi; Li, Hua
Source:
Environmental pollution 2020 v.256 pp. 113407
ISSN:
0269-7491
Subject:
manganese oxides,   etc   ; bioavailability; carbonates; chromium; composite materials; iron; polluted soils; redox potential; remediation; soil organic carbon; vinegars;     Show all 11 Subjects
Abstract:
... A composite material comprising of nanoscale zero-valent iron (nZVI) supported on vinegar residue (nZVI@VR) was prepared and applied for remediation of soils contaminated by hexavalent chromium (Cr(VI)). Sedimentation test results revealed that the nZVI@VR displayed enhanced stability in comparison to the bare-nZVI. Remediation experiments exhibited the immobilization efficiency of Cr(VI) and Crto ...
DOI:
10.1016/j.envpol.2019.113407

20. Quantifying the Coupled Kinetic Reactions of Metals/Metalloids on Iron and Manganese Oxides

Author:
Shi, Zhenqing
Source:
Bulletin of environmental contamination and toxicology 2019 v.103 no.6 pp. 763-765
ISSN:
0007-4861
Subject:
manganese oxides,   etc   ; adsorption; desorption; iron; metalloids; models; prediction; redox reactions;     Show all 8 Subjects
Abstract:
... Quantifying the coupled kinetic reactions of metals/metalloids on iron and manganese oxides is essential for predicting the fate of contaminants in the environment. In this perspective, a few key issues related to developing the quantitative models for the coupled kinetic reactions of metal and metalloids are discussed, including adsorption/desorption processes, redox reactions, and mineral dissol ...
DOI:
10.1007/s00128-019-02733-8