BiOCl/g-C3N4 heterojunction catalyst for efficient photocatalytic reduction of CO2 under visible light

被引：0

作者：

He Z. ^{[1
]}

Chen J. ^{[1
]}

Tong L. ^{[1
]}

Tang J. ^{[1
]}

Chen J. ^{[1
]}

Song S. ^{[1
]}

机构：

[1] College of Environment, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang

来源：

Song, Shuang (ss@zjut.edu.cn) | 1600年 / Materials China卷 / 67期

基金：

中国国家自然科学基金;

关键词：

Bismuth oxychloride; Carbon dioxide; Catalyst; Graphitic carbon nitride; Heterojunction; Reduction; Visible light;

D O I：

10.11949/j.issn.0438-1157.20160337

中图分类号：

学科分类号：

摘要：

BiOCl/g-C3N4 heterojunction catalyst was synthesized by a hydrothermal method using KCl, Bi(NO3)3 and g-C3N4 as precursors, over which the photocatalytic reduction of CO2 under visible light irradiation was conducted. The catalytic activity and the stability during CO2 photoreduction was studied. Moreover, effects of molar ratio of BiOCl to g-C3N4, usage amount of catalyst and illumination intensity on the photocatalytic reduction of CO2 was investigated. It suggests that the BiOCl/g-C3N4 heterojunction catalysts showed much enhanced photocatalytic activities for the reduction of gaseous CO2 with water vapor in comparison with BiOCl and g-C3N4. The BiOCl/g-C3N4 catalyst with molar ratio of 1:1 exhibited the highest photocatalytic activity for CO2 reduction under the optimal conditions of 0.1 g catalyst and 2.413×10-6 einstein·min-1·cm-2 of illumination intensity. Moreover, the catalyst maintained stable performance even after five cycles of test. Techniques of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analyses and UV-vis absorption spectroscopy were conducted on the catalyst, and it is speculated that the effective separation of photogenerated electrons and holes due to the formation of p-n heterojunctions between BiOCl and g-C3N4 accounted for the improved photocatalytic activities of BiOCl/g-C3N4. © All Right Reserved.

引用

页码：4634 / 4642

页数：8

共 39 条

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