Ag3PO4 Oxygen Evolution Photocatalyst Employing Synergistic Action of Ag/AgBr Nanoparticles and Graphene Sheets

被引：130

作者：

Hou, Yang ^{[1
]}

Zuo, Fan ^{[1
]}

Ma, Quan ^{[1
]}

Wang, Chen ^{[1
]}

Bartels, Ludwig ^{[1
]}

Feng, Pingyun ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 38期

基金：

美国国家科学基金会;

关键词：

HYDROGEN-PRODUCTION; H-2-PRODUCTION ACTIVITY; WATER; SEMICONDUCTOR; COCATALYSTS; HYBRID;

D O I：

10.1021/jp303219j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A graphene-supported Ag3PO4/Ag/AgBr water oxidation photocatalyst was prepared by a photoassisted deposition-precipitation reaction, followed by a hydrothermal treatment. The composite photocatalyst exhibits double the O-2-production activity than that of bare Ag3PO4 under visible light irradiation. Moreover, it exhibits enhanced activity in comparison to unsupported Ag3PO4/Ag/AgBr, to graphene-supported bare Ag3PO4 powder as well as to Ag/AgBr powder. This increase in activity is attributed to a combination of depletion of the conduction band of the as-synthesized n-doped Ag3PO4 material and a downshift of the Ag3PO4 valence band due to the pinning of its conduction band at the silver Fermi level, a process that is assisted by charge transfer and distribution onto the graphene support.

引用

页码：20132 / 20139

页数：8

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