Structure and composition study of carbon-doped titanium oxide film combined with first principles

被引:36
作者
Mai, Wei [1 ]
Wen, Feng [1 ]
Xie, Dong [2 ]
Leng, Yongxiang [2 ]
Mu, Zhonglin [3 ]
机构
[1] Hainan Univ, Sch Mat & Chem Engn, Minist Educ, Key Lab Adv Mat Trop Isl Resources, Haikou 570228, Peoples R China
[2] Minist Educ, Key Lab Adv Technol Mat, Chengdu 610031, Peoples R China
[3] Hainan Med Univ, Haikou 571199, Peoples R China
基金
中国国家自然科学基金;
关键词
C/Ti-O films; carbon-doped; magnetron sputtering; first principles;
D O I
10.1007/s40145-014-0092-2
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Carbon-doped titanium oxide (C/Ti-O) films were prepared on Si(100) wafer, stainless steel (type 304) and glass by reactive magnetron sputtering (RMS) using CO2 gas as carbon and oxygen source under room temperature (RT). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to analyze structure and composition of the as-prepared C/Ti-O film. It could be observed from XRD that the as-prepared C/Ti-O film contained TiO crystal phase structure. Ti2p XPS spectrum of the as-prepared C/Ti-O film showed that the valences of titanium were made up of Ti2+, Ti3+ and Ti4+. Cls XPS spectrum revealed that carbon was doped into titanium oxide based on the existence of the typical Ti-C bond. The optical absorption curve by ultraviolet-visible (UV-Vis) spectrophotometer showed that the C/Ti-O film appeared the remarkable red shift of absorption edge, which contributed to C substitution in O sites in amorphous TiO2. Photocatalysis test using methyl orange (MO) as indicator confirmed that the as-prepared C/Ti-O film had photocatalytic activity. Combined with the results of the tests and first-principles calculations, a potential photocatalysis mechanism was proposed.
引用
收藏
页码:49 / 55
页数:7
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