工业水处理 ›› 2019, Vol. 39 ›› Issue (2): 30-33. doi: 10.11894/1005-829x.2019.39(2).030

• 试验研究 • 上一篇    下一篇

g-C3N4/TiO2复合光催化剂的制备及其可见光催化性能

刘宏伟, 任学昌, 万建新, 付宁   

  1. 兰州交通大学环境与市政工程学院, 甘肃兰州 730070
  • 收稿日期:2018-11-20 出版日期:2019-02-20 发布日期:2019-03-15
  • 通讯作者: 任学昌,E-mail:rxchang1698@Hotmail.com。 E-mail:rxchang1698@Hotmail.com
  • 作者简介:刘宏伟(1991-),硕士研究生。电话:15535170421,E-mail:liuhongw0107@163.com。
  • 基金资助:
    国家自然科学基金项目(51268026,51068016)

Preparation of composite photo-catalyst g-C3N4/TiO2 and its photocatalytic capability under visible light

Liu Hongwei, Ren Xuechang, Wan Jianxin, Fu Ning   

  1. School of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
  • Received:2018-11-20 Online:2019-02-20 Published:2019-03-15

摘要: 采用高温煅烧法制备了类石墨相氮化碳(g-C3N4),将其与TiO2(P25)复合得到g-C3N4/TiO2复合光催化剂。采用XRD、FT-IR、UV-Vis/DRS、SEM等方法对制备的复合光催化剂进行了表征,并以亚甲基蓝(MB)为模拟污染物,考察了g-C3N4/TiO2的可见光催化活性。结果表明:通过复合,g-C3N4/TiO2的吸收波长向可见光区域移动;当g-C3N4与TiO2复合质量比为4:1时,所得到的g-C3N4/TiO2(4:1)复合光催化剂的催化活性最佳,其对MB的可见光催化活性是g-C3N4的2.74倍。

关键词: g-C3N4/TiO2, 复合光催化剂, 可见光催化, 亚甲基蓝

Abstract: The graphite-like carbon nitride(g-C3N4) has been prepared by calcination method at high temperature, and synthesized with TiO2(P25), so as to obtain the composite photo-catalyst g-C3N4/TiO2. The prepared composite photo-catalyst should be characterized by means of XRD,FT-IR,UV-Vis/DRS and SEM. Using methylene blue(MB) as simulated pollutant,the photo-catalytic activity of g-C3N4/TiO2 has been investigated under visible light. The results show that,through synthesis,the absorption wavelength of g-C3N4/TiO2 shifts to the visible light region. When the mass ratio of g-C3N4 and TiO2 is 4:1,the catalytic activity of the obtained composite photo-catalyst g-C3N4/TiO2(4:1), is the best. Its catalytic activity under visible light for MB is 2.74 times of that of g-C3N4.

Key words: g-C3N4/TiO2, composite photo-catalyst, catalysis under visible light, methylene blue

中图分类号: