نتایج جستجو برای: photocatalytic reduction

تعداد نتایج: 505956  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
longli lin guoguang liu wenying lv kun yao qintie lin yu zhang

uv/tio2 photocatalysis of chelated copper in aqueous solutions has been performed starting from cu(ii)-tartaric acid, cu(ii)-citric acid, cu(ii)-edta and cu(ii)-dtpa,in the presence of oxygen and at acidic ph. the photocatalytic reaction obeys first-order kinetic equation. the influence of cu(ii) on photocatalytic oxidation of organic ligands and how the various organics will affect the treatmen...

Journal: :Nanoscale 2010
Adelaide Miranda Eliana Malheiro Elżbieta Skiba Pedro Quaresma Patrícia A Carvalho Peter Eaton Baltazar de Castro John A Shelnutt Eulália Pereira

A photocatalytic approach was used to synthesize triangular nanoplates in aqueous solution. The synthesis is based on the reduction of a gold salt using a tin(iv) porphyrin as photocatalyst, cetyltrimethylammonium bromide (CTAB) as a stabilizing agent, and triethanolamine (TEA) as the final electron donor. The average edge length of the triangular nanoplates can be easily changed in the range 4...

Journal: :Angewandte Chemie 2014
Meng-Chun Hsieh Guan-Chang Wu Wei-Guang Liu William A Goddard Chia-Min Yang

Nanocomposites of tantalum-based pyrochlore nanoparticles and indium hydroxide were prepared by a hydrothermal process for UV-driven photocatalytic reactions including overall water splitting, hydrogen production from photoreforming of methanol, and CO2 reduction with water to produce CO. The best catalyst was more than 20 times more active than sodium tantalate in overall water splitting and 3...

Journal: :Accounts of chemical research 2013
Jinhui Yang Donge Wang Hongxian Han Can Li

Since the 1970s, splitting water using solar energy has been a focus of great attention as a possible means for converting solar energy to chemical energy in the form of clean and renewable hydrogen fuel. Approaches to solar water splitting include photocatalytic water splitting with homogeneous or heterogeneous photocatalysts, photoelectrochemical or photoelectrocatalytic (PEC) water splitting...

Journal: :iranian journal of catalysis 2014
mohammad khodadadi-moghaddam

photocatalytic reduction of carbon dioxide to formaldehyde was investigated on four semiconductor photocatalysts (fes, fes/fes2, nio and tio2). the reaction was carried out in continues flow of co2 gas bubbled into the reactor. semiconductor photocatalysts were characterized by x-ray diffraction (xrd) and diffuse reflectance spectroscopic (drs) methods. sulfide ion was used as hole scavenger. t...

Journal: :Dalton transactions 2015
Chui-Shan Tsang Lingjing Chen Lu-Wei Li Shek-Man Yiu Tai-Chu Lau Hoi-Lun Kwong

The pyridine-containing ligands and react with Ni(2+) ions to afford dinuclear triple-stranded helicate and tetrahedral cage supramolecular complexes, respectively; the two architectures exhibit contrasting reactivity towards electro- and photocatalytic proton reduction.

Journal: :Physical chemistry chemical physics : PCCP 2015
Yanyan Zhu Qiang Ling Yanfang Liu Hua Wang Yongfa Zhu

At present, composite photocatalysts containing MoS2 as a co-catalyst and a subjective semiconductor material are usually obtained via various complex reduction methods using NH4MoS4 or Na2MoO4 as a precursor. In this work, a simple method was proposed to synthesize MoS2-TiO2 composite photocatalysts via mechanochemistry using MoS2 as a direct precursor. 4.0% MoS2-TiO2 after ball-milling at 300...

2018
Abulajiang Reheman Yalkunjan Tursun Talifu Dilinuer Maimaiti Halidan Kuerbangnisha Kadeer Abulikemu Abulizi

In this study, a novel graphene/Ag3PO4 quantum dot (rGO/Ag3PO4 QD) composite was successfully synthesized via a facile one-step photo-ultrasonic-assisted reduction method for the first time. The composites were analyzed by various techniques. According to the obtained results, Ag3PO4 QDs with a size of 1-4 nm were uniformly dispersed on rGO nanosheets to form rGO/Ag3PO4 QD composites. The photo...

Journal: :Physical chemistry chemical physics : PCCP 2009
Jingfei Luan Bingcai Pan Yaron Paz Yongmei Li Xiaoshan Wu Zhigang Zou

Bi(2)SbVO(7) was prepared by solid-state reaction technique for the first time and the structural and photocatalytic properties of Bi(2)SbVO(7) and Bi(2)GaTaO(7) were investigated. The results showed that Bi(2)SbVO(7) crystallized with the tetragonal crystal system by space group I4/mmm. In addition, the band gaps of Bi(2)SbVO(7) and Bi(2)GaTaO(7) were estimated to be 2.33 and 2.52 eV. The phot...

Journal: :Molecules 2012
Yunjun Yang Jingfei Luan

A novel polyaniline/Bi(2)SnTiO(7 )composite polymer was synthesized by chemical oxidation in-situ polymerization method and sol-gel method for the first time. The structural properties of novel polyaniline/Bi(2)SnTiO(7) have been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray spectrometry. The lattice parameter of Bi(2)SnTiO(7) was f...

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