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Semiconductor-based nanocomposites for photocatalytic H(2) production and CO(2) conversion.
MedLine Citation:
PMID:  23322026     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Semiconductor-based photocatalysis has attracted much attention in recent years because of its potential for solving energy and environmental problems that we are now facing. Among many photocatalytic reactions, the splitting of H(2)O into H(2) and O(2) and the reduction of CO(2) with H(2)O into organic compounds such as CH(4) and CH(3)OH are two of the most important and challenging reactions. Many studies have been devoted to designing and preparing novel photocatalytic materials for these two reactions. This article highlights recent advances in developing semiconductor-based nanocomposite photocatalysts for the production of H(2) and the reduction of CO(2). The systems of semiconductor-cocatalyst, semiconductor-carbon (carbon nanotube or graphene) and semiconductor-semiconductor nanocomposites have mainly been described. It has been demonstrated that the design and preparation of nanocomposites with proper structures can facilitate charge separation/migration and decrease the charge recombination probability, thus promoting the photocatalytic activity. Keeping the reduction and oxidation processes in different regions in the nanocomposite may also enhance the photocatalytic efficiency and stability. The location and size of cocatalysts, the interfacial contact between semiconductor and carbon materials, and the heterojunctions between different semiconductors together with the suitable alignment of band edges of semiconductors are key factors determining the photocatalytic behaviours of the nanocomposite catalysts.
Authors:
Wenqing Fan; Qinghong Zhang; Ye Wang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-16
Journal Detail:
Title:  Physical chemistry chemical physics : PCCP     Volume:  -     ISSN:  1463-9084     ISO Abbreviation:  Phys Chem Chem Phys     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888160     Medline TA:  Phys Chem Chem Phys     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. wangye@xmu.edu.cn.
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