高等学校化学学报Issue(2)：361-367,7.DOI:10.7503/cjcu20140532
TiO2/Ag2 NCN复合光催化剂的制备与可见光催化性能
Synthesis of TiO2/Ag2 NCN Composite Catalysts and Their Photocatalytic Activity Under Visible Light Irradiation
摘要
Abstract
TiO2/Ag2 NCN composite catalysts were fabricated through the precipitation of silver salt and cya-namide in the presence of TiO2 nanoparticles. X-ray diffraction( XRD) , scanning electron microscopy( SEM) , Fourier transform infrared spectroscopy ( FTIR ) and Ultraviolet-visible ( UV-Vis ) spectoscopy were used to characterize the composites. The results showed that the heterojunction structure was obtained by depositing TiO2 nanoparticles on the surface of Ag2 NCN through weak physical interaction. The UV-Vis absorption peak of TiO2/Ag2 NCN shift toward long wavelength and the energy gap narrow down in comparison with that of pure Ag2 NCN. The degradation of methylene blue( MB) catalyzed by the samples under visible-light irradiation was investigated and enhanced photocatalytic activity was observed for TiO2/Ag2 NCN composite particles. The energy band structure of composite particles demonstrates that the presence of TiO2 promote the separation of photogenerated electron and hole, and as a result, improves the photocatalytic activity.关键词
可见光催化/氰胺银/二氧化钛/光生电子空穴分离Key words
Visible light photocatalysis/Silver cyanamide/Titania/Separation of photogenerated electron and hole分类
化学化工引用本文复制引用
李霞,张霞,朱泽峰,林国庆,李有彬,李晓雪,徐君莉..TiO2/Ag2 NCN复合光催化剂的制备与可见光催化性能[J].高等学校化学学报,2015,(2):361-367,7.基金项目
国家自然科学基金(批准号:21103017,51104042)资助 （批准号:21103017,51104042）
