Multichannel charge separation promoted ZnO /P25 heterojunctions for the photocatalytic oxidation of toluene

作     者：孔洁静 赖晓冬 芮泽宝 纪红兵 季生福 Jiejing Kong;Xiaodong Lai;Zebao Rui;Hongbing Ji;Shengfu Ji

作者机构：中山大学化学与化学工程学院广东广州510275 中山大学惠州研究院废气净化与控制研发中心广东惠州516081 中山大学化学工程与技术学院广东广州510275 北京化工大学化工资源有效利用国家重点实验室北京100029 

基　　金：supported by the National Natural Science Foundation of China(21576298,21425627) the Science and Technology Plan Project of Guangdong Province(2013B090500029) Natural Science Foundation of Guangdong Province(2014A030313135,2014A030308012) the State Key Laboratory of Chemical Resource Engineering(CRE-2015-C-301),China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2016年第37卷第6期

页      码：869-877页

摘      要：The fabrication of multicomponent heterojunctions is an effective strategy to improve the performance of TiO2 based photocatalysts. We provide a new strategy for improving the charge separation and photocatalytic performance of ZnO /TiO2 composites by the formation of multichannel charge separated heterojunctions. ZnO /P25 composites were prepared by an incipient wetness impregnation method, and applied for the photocatalytic destruction of gaseous toluene. The ZnO /P25 composites consist of anatase TiO2（ATiO2）, rutile TiO2（RTiO2） and hexagonal zincite structures. The parasitic phase of ZnO in P25 leads to the formation of ZnO（002）/ATiO2（101）/RTiO2（110） heterojunctions that exhibit enhanced light absorption and improved multichannel electron/hole separation. ZnO /P25 heterojunctions can completely oxidize toluene into CO2 and H2O under ultraviolet light irradiation at room temperature, and show enhanced photocatalytic activity in comparison with P25 owing to the efficient electron-hole separation. Such a multichannel charge separated design strategy may provide new insight into the design of highly effective photocatalysts and their potential technological applications.

主 题 词：Titanium dioxide Zinc oxide Toluene Photocatalysis Heterojunction Multichannel charge separation 

学科分类：081705[081705] 07[理学] 08[工学] 0817[工学-轻工类] 070602[070602] 0706[理学-大气科学类] 

核心收录：

D　O　I：10.1016/S1872-2067(15)61093-2

馆 藏 号：203182403...