摘要
采用69℃饱和水蒸气和H2混合气,于927℃下处理金红石型TiO2,得到不同氧缺位的光催化剂,并用X射线衍射(XRD)、比表面(BET)、电子顺磁共振(EPR)、紫外-可见漫反射(DRS)、光电子能谱(XPS)对其进行了表征.考察了热处理时间对氧缺位型TiO2光催化分解水析氧活性的影响.结果表明,适量的氧缺位能显著提高金红石型TiO2光催化分解水的析氧活性,其最大析氧速率达222μmol·L-1·h-1.
The rutile TiO2 catalysts with oxygen vacancies were obtained under 927 ℃ calcination using a mixed gas of saturation water vapor and H2 at 69 ℃. The catalysts were identified using X-ray diffraction （XRD）, specific surface （BET）, electron paramagnetic resonance spectroscopy （EPR）, UV-Vis diffuse refraction spectroscopy （DRS）, and X-ray photoelectron spectrum （XPS） measurements. The effect of calcination time on photocatalytic activity of TiO2 with different oxygen vacancies for O2 evolution was studied. The result indicated that appropriate oxygen vacancies could obviously improve the photocatalytic activity of rutile TiO2. The maximum O2 evolution speed of rutile TiO2 with oxygen vacancies was 222μmol·L^-1·h^-1.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2007年第12期1917-1921,共5页
Acta Physico-Chimica Sinica
基金
国家高技术研究发展规划(863项目)(2002AA327140)资助
关键词
二氧化钛
热处理
氧缺位
光催化活性
TiO2
Calcination
Oxygen vacancies
Photocatalytic activity
