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You searched for: Journal name Journal of materials chemistry A Remove constraint Journal name: Journal of materials chemistry A Subject term benzaldehyde Remove constraint Subject term: benzaldehyde Subject term catalytic activity Remove constraint Subject term: catalytic activity
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1. Organic electron-rich N-heterocyclic compound as a chemical bridge: building a Brönsted acidic ionic liquid confined in MIL-101 nanocages

Author:
Qun-xing Luo; Min Ji; Mei-heng Lu; Ce Hao; Jie-shan Qiu; Yan-qin Li
Source:
Journal of materials chemistry A 2013 v.1 no.22 pp. 6530-6534
ISSN:
2050-7496
Subject:
benzaldehyde; catalysts; catalytic activity; heterocyclic nitrogen compounds; ionic liquids
Abstract:
... A novel functionalized MOF material, Brönsted acidic ionic liquid (BAIL) confined inside well-defined MIL-101 nanocages, was developed for the first time based on the tandem post-synthetic strategy. The catalytic performance of BAIL confined in MIL-101 material was evaluated by using the acetalization of benzaldehyde with glycol as a probe reaction. The resulting BAIL/MIL-101 material exhibited su ...
DOI:
10.1039/c3ta10975e

2. A comprehensive study on the effect of preparation methods for Au-core@shell silica materials in room temperature oxidative amide formation

Author:
Jiale Huang; Mingyu Zhang; Jing Wang; Xijun Hu; Rafael Luque; Frank L. Y. Lam
Source:
Journal of materials chemistry A 2014 v.3 no.2 pp. 789-796
ISSN:
2050-7496
Subject:
ambient temperature; benzaldehyde; catalysts; catalytic activity; gold; morpholine; nanogold; porous media; silica; surface area
Abstract:
... Core–shell silica comprising mesoporous SiO₂ shell and solid SiO₂ core (SiO₂@mSiO₂) was utilized as catalytic support to prepare highly active and efficient Au–SiO₂@mSiO₂ catalysts for room temperature catalysis. Results showed that the mesoporous shell significantly contributed to the high surface area of SiO₂@mSiO₂. Au nanocatalysts prepared by different methods (impregnation, IM and deposition– ...
DOI:
10.1039/c4ta04574b

3. Biogenic flower-shaped Au–Pd nanoparticles: synthesis, SERS detection and catalysis towards benzyl alcohol oxidation

Author:
Daohua Sun; Genlei Zhang; Xinde Jiang; Jiale Huang; Xiaolian Jing; Yanmei Zheng; Jing He; Qingbiao Li
Source:
Journal of materials chemistry A 2014 v.2 no.6 pp. 1767-1773
ISSN:
2050-7496
Subject:
Platycladus orientalis; X-ray diffraction; alloy nanoparticles; alloys; ambient temperature; ascorbic acid; benzaldehyde; benzyl alcohol; catalytic activity; energy-dispersive X-ray analysis; gold; leaf extracts; oxidation; palladium; rhodamines; spectroscopy; transmission electron microscopy
Abstract:
... ∼40 nm flower-shaped Au–Pd bimetallic nanoparticles were prepared in a facile and eco-friendly way based on the simultaneous bioreduction of HAuCl₄ and Na₂PdCl₄ with ascorbic acid and Cacumen Platycladi leaf extract at room temperature. Characterization techniques, such as transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction, were employed to confirm that t ...
DOI:
10.1039/c3ta13922k

4. Fabrication of novel hybrid nanoflowers from boron nitride nanosheets and metal–organic frameworks: a solid acid catalyst with enhanced catalytic performance

Author:
Peng Wang; Hao Li; Qiang Gao; Pei-Zhou Li; Xin Yao; Linyi Bai; Kim Truc Nguyen; Ru-Qiang Zou; Yanli Zhao
Source:
Journal of materials chemistry A 2014 v.2 no.44 pp. 18731-18735
ISSN:
2050-7496
Subject:
aluminum; aqueous solutions; benzaldehyde; binding capacity; boron nitride; catalysts; catalytic activity; coordination polymers; facilitated diffusion; hot water treatment; ions; methanol; nanoflowers; nanosheets; solvents
Abstract:
... A double solvent replacement method was employed for the synthesis of novel hybrid nanoflowers from boron nitride nanosheets (BNNSs) and the metal–organic framework (MOF) MIL-53 in aqueous solutions under hydrothermal treatments. The strong binding ability of aluminum ions onto the surface of BNNSs determines the 3D flowerlike architectures of the BNNSs/MOFs hybrid, and the BNNSs act as a structur ...
DOI:
10.1039/c4ta04230a

5. Nanostructured films of in situ deprotected thioacetyl-functionalized C₆₀-fullerenes on a gold surface

Author:
Piotr Piotrowski; Joanna Pawłowska; Jan Pawłowski; Agnieszka Więckowska; Renata Bilewicz; Andrzej Kaim
Source:
Journal of materials chemistry A 2014 v.2 no.7 pp. 2353-2362
ISSN:
2050-7496
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; atomic force microscopy; benzaldehyde; catalytic activity; chemical reduction; density functional theory; dielectric spectroscopy; electrochemistry; electrodes; electrospray ionization mass spectrometry; fullerene; gold; halogenated hydrocarbons; nanogold; nuclear magnetic resonance spectroscopy; solvents
Abstract:
... A series of thioacetyl-functionalized fullerene-C₆₀ derivatives were synthesized using the Prato reaction of fullerene-C₆₀ with six different 4-(S-acetylthioalkyl)benzaldehydes. The structures of the synthesized compounds were characterized by FT-IR, ¹H NMR and ESI-MS techniques. The LUMO–HOMO band gaps, derived from DFT B3LYP/6-31G* calculations, for the azomethine ylides corresponding to each 4- ...
DOI:
10.1039/c3ta13844e

6. Porous macromolecular dihydropyridyl frameworks exhibiting catalytic and halochromic activity

Author:
Bo Xiao; Timothy L. Easun; Amarajothi Dhakshinamoorthy; Izabela Cebula; Peter H. Beton; Jeremy J. Titman; Hermenegildo Garcia; K. Mark Thomas; Martin Schröder
Source:
Journal of materials chemistry A 2014 v.2 no.46 pp. 19889-19896
ISSN:
2050-7496
Subject:
adsorbents; adsorption; benzaldehyde; carbon dioxide; catalysts; catalytic activity; condensation reactions; desorption; nitrogen; porosity; porous media
Abstract:
... New porous macromolecular frameworks (PMFs) have been designed and prepared by the condensation of dialdehydes with aminoacrylonitriles. Two porous materials were prepared by reacting 3,3′-benzene-1,4-diylbis(3-aminoprop-2-enenitrile) with benzene-1,4-dicarbaldehyde and biphenyl-4,4′-dicarbaldehyde to give PMF-NOTT-1 and PMF-NOTT-2, respectively. Adsorption and desorption studies of N₂ (77 K) and ...
DOI:
10.1039/c4ta02521k

7. Preparation of silver–tungsten nanostructure materials for selective oxidation of toluene to benzaldehyde with hydrogen peroxide

Author:
Shilpi Ghosh; Shankha S. Acharyya; Deependra Tripathi; Rajaram Bal
Source:
Journal of materials chemistry A 2014 v.2 no.38 pp. 15726-15733
ISSN:
2050-7496
Subject:
benzaldehyde; catalysts; catalytic activity; cationic surfactants; cetyltrimethylammonium bromide; hydrogen peroxide; leaching; nanorods; nanosilver; oxidation; silver; temperature; toluene; tungsten oxide
Abstract:
... We have developed a facile one-pot synthetic strategy to prepare Ag/WO₃ nanostructure materials with different morphologies using a cationic surfactant, cetyltrimethylammonium bromide. These materials were employed as catalysts in the direct synthesis of toluene to benzaldehyde using H₂O₂. The morphology of the Ag/WO₃ materials can be varied by changing the synthesis parameters. The size and shape ...
DOI:
10.1039/c4ta03641g

8. Synthesis of hierarchical mesoporous vanadium silicate-1 zeolite catalysts for styrene epoxidation with organic hydroperoxide

Author:
Bhawan Singh; Anil Kumar Sinha
Source:
Journal of materials chemistry A 2014 v.2 no.6 pp. 1930-1939
ISSN:
2050-7496
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; benzaldehyde; catalysts; catalytic activity; epoxidation reactions; nitrogen; oxidants; oxidation; physicochemical properties; porosity; porous media; scanning electron microscopy; sorption; styrene; surface area; transmission electron microscopy; ultraviolet-visible spectroscopy; vanadium; zeolites
Abstract:
... Hierarchical mesoporous vanadium silicate-1 zeolites were successfully synthesized via a hydrothermal route using amphiphilic organosilanes as pore-directing templates. Also, to investigate the effect of the amount of vanadium metal on the physicochemical properties and catalytic activity, different hierarchical mesoporous vanadium silicate-1 zeolites have been successfully synthesized with varyin ...
DOI:
10.1039/c3ta13451b

9. The templating effect of an easily available cationic polymer with widely separated charge centers on the synthesis of a hierarchical ZSM-5 zeolite

Author:
Yicheng Zhang; Kake Zhu; Xuezhi Duan; Xinggui Zhou; Weikang Yuan
Source:
Journal of materials chemistry A 2014 v.2 no.43 pp. 18666-18676
ISSN:
2050-7496
Subject:
benzaldehyde; butanol; catalytic activity; composite polymers; condensation reactions; cyclohexanones; methanol; nanocrystallites; polyamines; quaternary ammonium compounds; zeolites
Abstract:
... The epichlorohydrin-N,N-dimethyl-1,3-diaminopropane copolymer (PCA) has been introduced for the first time as a meso-template to successfully synthesize a hierarchical ZSM-5 zeolite (PCA-ZSM-5) with mesopores of 7–50 nm in diameter by using small-sized nanoblocks. However, when its structural analogue epichlorohydrin–dimethylamine polyamine (PCS) is used, the obtained ZSM-5 zeolite (PCS-ZSM-5) has ...
DOI:
10.1039/c4ta02325k

10. (100) surface-exposed CeO₂ nanocubes as an efficient heterogeneous catalyst in the tandem oxidation of benzyl alcohol, para-chlorobenzyl alcohol and toluene to the corresponding aldehydes selectively

Author:
Kalyanjyoti Deori; Chinmoy Kalita; Sasanka Deka
Source:
Journal of materials chemistry A 2015 v.3 no.13 pp. 6909-6920
ISSN:
2050-7496
Subject:
benzaldehyde; benzyl alcohol; catalysts; catalytic activity; ceric oxide; crystal structure; nanocrystals; nanorods; oxidation; oxygen; porosity; surface area; toluene
Abstract:
... A new synthesis strategy has been developed to synthesize exclusively (100)-surface-exposed CeO₂ nanocubes (∼90 nm), formed through three dimensional (3D) self-assembly of smaller ceria nanocrystal building blocks, as an efficient heterogeneous catalyst for multiple selective oxidation reactions. To compare the effect of morphology on catalysis, 1D CeO₂ nanorods have also been tested in parallel. ...
DOI:
10.1039/c4ta06547f

11. Al-coordination polymer-derived nanoporous nitrogen-doped carbon microfibers as metal-free catalysts for oxygen electroreduction and acetalization reactions

Author:
Zhen Han; Youyi Yu; Yongbo Zhang; Bing Dong; Aiguo Kong; Yongkui Shan
Source:
Journal of materials chemistry A 2015 v.3 no.47 pp. 23716-23724
ISSN:
2050-7496
Subject:
acids; aluminum; aqueous solutions; benzaldehyde; carbon; catalysts; catalytic activity; chemical precipitation; coordination polymers; durability; electrochemistry; electrolytes; ethylene glycol; moieties; nanopores; nitrates; oxygen; potassium hydroxide; pyrolysis; temperature
Abstract:
... Nanoporous nitrogen-doped carbon microfibers were facilely synthesized by the pyrolysis of coordination polymer microfibers of aluminium-diethylenetriamine pentaacetic acid (Al-DTPA). Al-DTPA microfibers could be easily produced at a scale of over 0.25 kilograms by a homogeneous precipitation reaction of DTPA and aluminium nitrate in aqueous solution. After undergoing thermal conversion of Al-DTPA ...
DOI:
10.1039/c5ta05605e

12. Formation of reusable Au-acetonitrile polymers and N-doped graphene catalyst under UV light via submerged liquid plasma process

Author:
Jaganathan Senthilnathan; Kodepelly Sanjeeva Rao; Wan-Hsien Lin; Jyh-Ming Ting; Masahiro Yoshimura
Source:
Journal of materials chemistry A 2015 v.3 no.6 pp. 3035-3043
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; absorbance; acetonitrile; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; glass; gold; graphene; liquids; nanogold; nanohybrids; nitrogen; oxidation; polymers; transmission electron microscopy; ultraviolet radiation
Abstract:
... In this study, acetonitrile polymers (ANPs) synthesized using a submerged liquid plasma (SLP) process were used for the direct reduction of Au³⁺ under ultraviolet (UV) light without the need for reducing or templating agents. Nitrogen-functionalized graphene (NFG) and ANPs, both synthesized via the SLP process were used to form a Au–ANPs–NFG nanohybrid. The pyridinic and pyrrolic nitrogen present ...
DOI:
10.1039/c4ta05586a

13. Synthesis and catalytic properties of ZSM-5 zeolite with hierarchical pores prepared in the presence of n-hexyltrimethylammonium bromide

Author:
Peng Bai; Pingping Wu; Wei Xing; Daolan Liu; Lianming Zhao; Youhe Wang; Benjing Xu; Zifeng Yan; Xiu Song Zhao
Source:
Journal of materials chemistry A 2015 v.3 no.36 pp. 18586-18597
ISSN:
2050-7496
Subject:
acetophenones; aluminum; benzaldehyde; catalytic activity; condensation reactions; crystallization; cyclohexanones; macropores; mass transfer; methanol; micropores; quaternary ammonium compounds; silicon; temperature; zeolites
Abstract:
... ZSM-5 samples with hierarchical pores (macropores, mesopores and micropores) were synthesized in the presence of n-hexyltrimethylammonium bromide (HTAB) and tetrapropylammonium hydroxide (TPAOH). The effect of synthesis conditions including the Si/Al ratio, crystallization temperature and time, and the amount of HTAB added to the synthesis system on the final products was examined. The catalytic p ...
DOI:
10.1039/c5ta05350a

14. Skeletal Au prepared from Au–Zr amorphous alloys with controlled atomic compositions and arrangement for active oxidation of benzyl alcohol

Author:
Ai Nozaki; Yasutomo Tanihara; Yasutaka Kuwahara; Tetsutaro Ohmichi; Kohsuke Mori; Takeshi Nagase; Hiroyuki Y. Yasuda; Christophe Calers; Catherine Louis; Hiromi Yamashita
Source:
Journal of materials chemistry A 2016 v.4 no.21 pp. 8458-8465
ISSN:
2050-7496
Subject:
activation energy; active sites; alloys; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; gold; moieties; nanogold; nanopores; oxidants; oxidation; oxygen; surface area; zirconium; zirconium oxide
Abstract:
... Skeletal (nanoporous) gold catalysts were prepared from Au–Zr amorphous alloys by immersion in HF solution to extract Zr moieties. The catalytic performance of the skeletal Au catalyst for the oxidation of benzyl alcohol to benzaldehyde was examined using O₂ as an oxidant. The amount of benzaldehyde formed over skeletal Au treated with HF solution for 1 h was the highest among the prepared samples ...
DOI:
10.1039/c6ta01963c

15. TEMPO-functionalized mesoporous silica particles as heterogeneous oxidation catalysts in flow

Author:
Julia S. Schulze; Julia Migenda; Maximilian Becker; Sören M. M. Schuler; Raffael C. Wende; Peter R. Schreiner; Bernd M. Smarsly
Source:
Journal of materials chemistry A 2020 v.8 no.7 pp. 4107-4117
ISSN:
2050-7496
Subject:
benzaldehyde; benzyl alcohol; catalytic activity; condensation reactions; continuous systems; high performance liquid chromatography; industrial applications; organocatalysts; oxidation; porous media; silica
Abstract:
... Organocatalysts immobilized on inorganic porous substrates possess fundamental benefits, e.g., a high catalyst/reactant ratio, easy scalability as well as work-up, and continuous processing. Here we report the development of a heterogeneous (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) catalyst immobilized on mesoporous SiO₂ and demonstrate its feasibility in the oxidation of benzyl alcohol to b ...
DOI:
10.1039/c9ta12416k

16. Confinement of Au³⁺-rich clusters by using Silicalite-1 for selective solvent-free oxidation of toluene

Author:
He Huang; Wanyue Ye; Caicheng Song; Yingcen Liu; Xiaotong Zhang; Yu Shan; Yuzhen Ge; Shufen Zhang; Rongwen Lu
Source:
Journal of materials chemistry A 2021 v.9 no.26 pp. 14710-14721
ISSN:
2050-7496
Subject:
adsorption; benzaldehyde; benzoic acid; catalytic activity; desorption; evolution; nanogold; oxidation; oxygen; superoxide anion; toluene
Abstract:
... The selective oxidation of primary carbon–hydrogen bonds in the methyl group of toluene to corresponding oxygenates is of immense significance. This transformation, however, remains challenging and often requires either extensive optimization of the present chemical operating processes or, more importantly, the design and development of novel catalysts. In this paper, we achieve the confinement of ...
DOI:
10.1039/d1ta02347k