物理化学学报2013，Vol.29Issue(7)：1566-1571,6.DOI:10.3866/PKU.WHXB201304284
锐钛矿(001)与(101)晶面在光催化反应中的作用
Roles of (001) and (101) Facets of Anatase TiO2 in Photocatalytic Reactions
摘要
Abstract
Single crystals of anatase TiO2 with exposed (001) and (101) facets were synthesized by a hydrothermal method.We carried out photocatalytic reduction reactions to deposit noble metals (Au,Ag,and Pt) and photocatalytic oxidation reactions to deposit metal oxides (PbO2 and MnOx) on the surface of TiO2.The deposited anatase TiO2 samples were characterized by transmission electron microscopy (TEM),scanning electron microscopy (SEM),energy-dispersive X-ray spectroscopy (EDX),and X-ray photoelectron spectroscopy (XPS) to study the roles of the two facets of anatase TiO2 in photocatalytic reactions.The noble metals were selectively deposited on the exposed (101) facet,while metal oxides were selectively deposited on the exposed (001) facet.This result indicated that photogenerated electrons and holes mainly accumulated on the (101) and (001) facets,and then took part in photocatalytic reduction and oxidation reactions,respectively.These results also suggested that the simultaneous exposure of the two facets could facilitate charge separation.Therefore,it was proposed that the simultaneous exposure of two facets with different functions will be a new strategy to effectively promote photocatalytic reaction.关键词
TiO2/锐钛矿/光催化/晶面/电荷分离Key words
TiO2/ Anatase/ Photocatalysis/ Crystal facet/ Charge separation分类
化学化工引用本文复制引用
王翔,李仁贵,徐倩,韩洪宪,李灿..锐钛矿(001)与(101)晶面在光催化反应中的作用[J].物理化学学报,2013,29(7):1566-1571,6.基金项目
The project was supported by the National Natural Science Foundation of China (21090341,21061140361).国家自然科学基金(21090341,21061140361)资助项目 （21090341,21061140361）
