g-C3N4/TiO2复合材料的制备及可见光催化降解硝基苯
Preparation of g-C3N4/TiO2 Composite and Visible Light Catalytic Degradation of Nitrobenzene
秦于伟 1王南 2王松 2薛祥 1林雪 1王宝辉1
作者信息
- 1. 东北石油大学 化学化工学院,黑龙江 大庆 163318
- 2. 大庆油田设计院有限公司,黑龙江 大庆 163000
- 折叠
摘要
采用原位合成法在TiO2 纳米管上沉积g-C3N4 对材料进行改性,通过改变尿素的质量浓度制备了一系列不同负载量的g-C3N4/TiO2 复合材料(0.2、0.3、0.4、0.5、0.6 g·L-1 g-C3N4/TiO2 NTs),然后在可见光条件下考察了g-C3N4/TiO2 复合材料光催化降解硝基苯的性能,并对材料做了相关的表征分析和自由基清除实验.结果表明:将g-C3N4 负载到TiO2 纳米管上可以显著提高光催化活性,可能是由于g-C3N4 和TiO2 之间形成了异质结,延长了载流子的寿命,阻碍了电子与空穴的复合,从而提升了复合材料的光催化活性.
Abstract
g-C3N4 was deposited on TiO2 nanotubes by in-situ synthesis to modify the material.A series of g-C3N4/TiO2 composites with different loading amounts(0.2,0.3,0.4,0.5,0.6 g·L-1 g-C3N4/TiO2 NTs)were prepared by changing the mass concentration of urea.Then,the photocatalytic degradation performance of g-C3N4/TiO2 composite materials for nitrobenzene was investigated under visible light conditions,and related characterization analysis and free radical scavenging experiments were conducted on the materials.The final test results showed that the photocatalytic activity could be significantly improved by loading g-C3N4 onto titanium dioxide nanotubes.It may be due to the formation of heterojunction between g-C3N4 and titanium dioxide,which prolongs the life of the carrier and hinders the recombination of electrons and holes,improving the photocatalytic activity of the composite.
关键词
g-C3N4/TiO2/硝基苯/异质结/光催化Key words
g-C3N4/TiO2/Nitrobenzene/Heterojunction/Photocatalysis引用本文复制引用
基金项目
黑龙江省自然科学基金(LH2022B06)
出版年
2024
NETL
NSTL
万方数据