化工进展2025，Vol.44Issue(4)：2045-2056,12.DOI:10.16085/j.issn.1000-6613.2024-0583
g-C3N4/TiO2异质结光催化剂的制备及其对NO的降解性能
Preparation of g-C3 N4/TiO2 heterojunction catalyst and its photocatalytic NO degradation performance
张佩 1高莉宁 1丁思晴 1李立 1祝锡爇 1何锐1
作者信息
- 1. 长安大学材料科学与工程学院,陕西 西安 710062
- 折叠
摘要
Abstract
Modification of graphite phase carbon nitride(g-C3N4,CN)is an important means to improve its photocatalytic performance.S-doped carbon nitride(SCN)was prepared by thermal polymerization with thiourea as the precursor,and binary heterojunction composite photocatalysts CN-Ti and SCN-Ti were prepared with graphite phase carbon nitride,S-doped carbon nitride and TiO2 as the main components.The morphology,structure,optical and electrochemical properties of the photocatalyst were analyzed by X-ray diffraction,scanning electron microscope,X-ray photoelectron spectroscopy,specific surface area,ultraviolet-visible diffuse reflectance and electrochemical test,and their photocatalytic performance were evaluated by degradation of NO.According to the free radical capture experiment,the photocatalytic degradation mechanism was further studied.The results showed that the binary heterojunction composite photocatalyst SCN-Ti had better photocatalytic performance.When the mass ratio of SCN:TiO2 was 5:5,the photocatalytic NO degradation rate was the highest,reaching 84.9％and 57.1％under ultraviolet light and visible light,respectively,which was significantly higher than that of CN(61.7％and 44.2％,respectively),and after five cycles,it still had good photocatalytic activity.The improvement of photocatalytic activity was mainly attributed to the type Ⅱ heterojunction constructed by SCN and TiO2,which promoted carrier separation and improved the generation efficiency of photogenerated electrons,holes and·O-2 free radicals that degraded NO active substances.This study provided a reference for broadening the application of g-C3N4 in the field of photocatalysis.关键词
石墨相氮化碳/光催化/NO降解/二氧化钛异质结/S掺杂氮化碳Key words
graphite phase carbon nitride/photocatalysis/NO degradation/titanium dioxide heterojunction/S-doped carbon nitride分类
化学化工引用本文复制引用
张佩,高莉宁,丁思晴,李立,祝锡爇,何锐..g-C3N4/TiO2异质结光催化剂的制备及其对NO的降解性能[J].化工进展,2025,44(4):2045-2056,12.
