Influence of heat treatment process on photocatalytic activity of photocatalyst TiO2/TiCxOy coatings during heat treatment in carbon powder

被引：6
作者：
Guan, Sujun [1 ,2 ]
Hao, Liang [3 ]
Yoshida, Hiroyuki [4 ]
Asanuma, Hiroshi [1 ,2 ]
Pan, Fusheng [5 ]
Lu, Yun [1 ,2 ]
机构：
[1] Chiba Univ, Grad Sch, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan
[2] Chiba Univ, Fac Engn, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan
[3] Tianjin Univ Sci & Technol, Coll Mech Engn, 1038 Dagu Nanlu, Tianjin 300222, Peoples R China
[4] Chiba Ind Technol Res Inst, Inage Ku, 6-13-1 Tendai, Chiba 2630016, Japan
[5] Chongqing Univ, Coll Mat Sci & Engn, 174 Shazhengjie, Chongqing 400044, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2016年 / 27卷 / 10期
关键词：
TIO2; PHOTOCATALYSIS; SURFACE; TITANIUM; NANOPARTICLES; ABSORPTION; ATMOSPHERE; FILMS;
D O I：
10.1007/s10854-016-5126-9
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Photocatalyst TiO2/TiCxOy coatings on alumina (Al2O3) balls had been successfully fabricated by mechanical coating technique with titanium (Ti) powder and subsequent heat treatment in carbon powder. The influence of heat treatment conditions in carbon powder on the formed compounds, surface morphology and photocatalytic activity of photocatalyst TiO2/TiCxOy coatings was investigated. XRD results show that the compounds of TiCxOy and TiO2 were formed on the surface of Ti coatings during heat treatment in carbon powder. The relative amounts of TiCxOy and TiO2 remarkably varies with changing the heat treatment temperature and/or holding time. The formed nano-bump structure during heat treatment in carbon powder at 1073 or 1173 K, could increase the accessible surface area. The formation of Ti3+ and generated oxygen vacancies confirmed by XPS measurement, are in favor of narrowing band gap to enhance the visible-light photocatalytic activity of photocatalyst TiO2/TiCxOy coatings. The photocatalytic activity of the sample by heat treatment in carbon powder at 1173 K for 15 h shows highest. The fabrication strategy provides us a facile preparation procedure of visible-light responsive photocatalyst coatings.
引用
收藏
页码：10399 / 10404
页数：6
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