Direct Imaging of Highly Anisotropic Photogenerated Charge Separations on Different Facets of a Single BiVO4 Photocatalyst

被引：358

作者：

Zhu, Jian ^{[1
,2
]}

Fan, Fengtao ^{[1
]}

Chen, Ruotian ^{[1
,2
]}

An, Hongyu ^{[1
,2
]}

Feng, Zhaochi ^{[1
]}

Li, Can ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, iChEM,Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 31期

关键词：

charge carrier injection; charge separation; crystal engineering; imaging; photocatalysis; SURFACE PHOTOVOLTAGE; FORCE MICROSCOPY; CRYSTAL;

D O I：

10.1002/anie.201504135

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Spatially resolved surface photovoltage spectroscopy (SRSPS) was employed to obtain direct evidence for highly anisotropic photogenerated charge separation on different facets of a single BiVO4 photocatalyst. Through the controlled synthesis of a single crystal with preferentially exposed {010} facets, highly anisotropic photogenerated hole transfer to the {011} facet of single BiVO4 crystals was observed. The surface photovoltage signal intensity on the {011} facet was 70 times stronger than that on the {010} facets. The influence of the built-in electric field in the space charge region of different facets on the anisotropic photoinduced charge transfer in a single semiconductor crystal is revealed.

引用

页码：9111 / 9114

页数：4

共 30 条

[1] Self-Templated Synthesis of Single-Crystal and Single-Domain Ferroelectric Nanoplates [J].