化工学报2016，Vol.67Issue(11)：4634-4642,9.DOI:10.11949/j.issn.0438-1157.20160337
BiOCl/g-C3N4异质结催化剂可见光催化还原CO2
BiOCl/g-C3N4 heterojunction catalyst for efficient photocatalytic reduction of CO2 under visible light
摘要
Abstract
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.关键词
催化剂/二氧化碳/还原/可见光/异质结/氯氧化铋/类石墨氮化碳Key words
catalyst/carbon dioxide/reduction/visible light/heterojunction/bismuth oxychloride/graphitic carbon nitride分类
化学化工引用本文复制引用
何志桥,陈锦萍,童丽丽,汤俊涛,陈建孟,宋爽..BiOCl/g-C3N4异质结催化剂可见光催化还原CO2[J].化工学报,2016,67(11):4634-4642,9.基金项目
国家自然科学基金项目（21477117，21177115）；浙江省自然科学基金杰出青年项目（LR13B070002，LR14E080001）。@@@@Foundation item：supported by the National Natural Science Foundation of China (21477117,21177115) and the Natural Science Foundation of Zhejiang Province (LR13B070002, LR14E080001) （21477117,21177115）
