光催化
煅烧
异质结
可见光谱
碳纤维
光电流
材料科学
化学工程
热液循环
量子点
纳米技术
光化学
复合数
化学
光电子学
催化作用
复合材料
有机化学
工程类
作者
Jiankui Jia,Xiaorui Zhang,Caiyun Jiang,Wenxin Huang,Yuping Wang
标识
DOI:10.1016/j.jallcom.2020.155180
摘要
In this work, the g-C3N4/Bi2WO6 Z-scheme composites were synthesized by in-situ calcination and hydrothermal method and the novel g-C3N4/Bi2WO6/NCQs was constructed by introducing nitrogen-doped carbon quantum dots (NCQs) on the interface of g-C3N4/Bi2WO6 catalyst. UV–vis spectroscopy data showed that the improved visible light utilization efficiency of the catalyst is attributed to the composition of g-C3N4/Bi2WO6 Z-scheme heterojunction and the addition of NCQs. Photocurrent response analysis and fluorescence intensity measurements showed that the high separation efficiency of photogenerated electron-hole pairs in the g-C3N4/Bi2WO6/NCQs composite. In addition, the excellent structural stability of g-C3N4/Bi2WO6/NCQs can be proved by the analysis data of cycle experiments and XRD diffraction peaks of catalysts before and after experiments. Obviously, the above experimental data and analysis demonstrated the outstanding photocatalytic activity of g-C3N4/Bi2WO6/NCQs. Free radical capture experimental data analysis confirmed that superoxide ion radicals (·O2−) and holes (h+) play a major role in the reaction process, and the possible photocatalytic mechanism of g-C3N4/Bi2WO6/NCQs was proposed to further understand its enhanced photocatalytic activity.
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