Enhancement of photocurrent and photocatalytic activity of ZnO hybridized with graphite-like C3N4

被引：1054

作者：

Wang, Yajun ^{[1
]}

Shi, Rui ^{[1
]}

Lin, Jie ^{[1
]}

Zhu, Yongfa ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 08期

基金：

美国国家科学基金会;

关键词：

CARBON NITRIDE; ZINC-OXIDE; PHOTOCORROSION INHIBITION; HYDROGEN EVOLUTION; TIO2; DEGRADATION; SEMICONDUCTORS; PARTICLES; OXIDATION; G-C3N4;

D O I：

10.1039/c0ee00825g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A ZnO photocatalyst was hybridized with graphite-like C3N4 via a monolayer-dispersed method. After hybridization with C3N4, the photocurrent of ZnO was enhanced by 5 times under UV irradiation and a photocurrent under visible light irradiation was observed. The photocatalytic activity of C3N4/ZnO under UV irradiation was increased by 3.5 times, the visible light photocatalytic activity was generated and the photocorrosion of ZnO was suppressed completely after ZnO was hybridized with C3N4. The enhancement in performance and photocorrosion inhibition under UV irradiation was induced by the high separation efficiency of photoinduced holes from ZnO to the HOMO of C3N4. Under visible light irradiation, the electron excited from the HOMO to the LUMO of C3N4 could directly inject into the CB of ZnO, making C3N4/ZnO present visible light photocatalytic activity. The optimum synergetic effect of C3N4/ZnO was found at a weight ratio of 3%, which corresponded to a monolayer dispersion of C3N4 on the surface of ZnO.

引用

页码：2922 / 2929

页数：8

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