贵金属/WO_3复合纳米晶的气敏与光催化研究进展  

Recent progress in noble metal/WO_3 composite nanostructures for gas-sensing and photocatalytic applications

作　　者：尹莉[1] 陈德良[1] 李涛[1] 张毅[1] 张锐[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《化工进展》2012年第1期133-143,共11页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(50802090);中国博士后科学基金(20090450094;201003397);中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室开放基金(SKL200905SIC)项目

摘　　要：WO3作为新型的气敏材料和光催化剂具有广阔的应用前景,通过贵金属纳米簇修饰后的WO3复合纳米晶比WO3基体材料在性能上大幅提高。本文综述了贵金属修饰对WO3基体气敏和光催化性能的影响,其中气敏性能以不同敏感气体(如NOx、H2S、H2等)为分类依据,而光催化性能以不同贵金属(Au、Ag、Pt等)添加剂为分类依据,系统综述了贵金属/WO3复合纳米晶的气敏和光催化性能研究最新进展,并总结了常见贵金属/WO3的气敏和光催化机理模型,提出了贵金属/WO3在气敏和光催化应用过程中存在的问题及前景展望。WO3-based composite nanostructures have been used as the promising materials for gas-sensing and photocatalytic applications.The performance of WO3 composite nanostructures modified by noble metals can be greatly improved compared to individual WO3 material.In this paper,the recent progress in the gas-sensing and photocatalytic properties of noble-metal-modified WO3 composite nanostructures is reviewed.Effects of preparation methods and noble metal dopants on the gas-sensing properties to various gases,such as NOx,H2S,H2 and etc.,have been discussed in detail.The gas sensing mechanisms of noble-metal-modified WO3 composite nanostructures have been introduced.The photocatalytic properties of noble-metal-modified WO3 composite nanostructures are reviewed according to the species of noble metal（ssuch as Au,Ag,Pt and Pd nanoclusters）.The recent achievements in improving the photocatalytic performance of noble-metal-modified WO3 composite nanocatalysts and the related photocatalytic mechanisms have been summarized.Some existing issues and future trends in development of the noble-metal-modified WO3 composite photocatalysts have been also included.

关 键 词：WO3纳米晶 贵金属纳米晶簇 气敏性能 气敏机理 光催化性能 光催化机理 

分 类 号：O644.1[理学—物理化学] TP212.2[理学—化学]