期刊
JOURNAL OF ADVANCED CERAMICS
卷 3, 期 1, 页码 49-55出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s40145-014-0092-2
关键词
C/Ti-O films; carbon-doped; magnetron sputtering; first principles
资金
- National Natural Science Foundation of China [51062002, 81171462]
- National Science Fund of Hainan Province [511113]
- Key Project of Science and Technology Planning of Hainan Province [ZDXM20110051]
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.
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