摘要
以乙醇为碳源, 采用操作简单的真空活化法一步实现对TiO2的Ti3+与C的共掺杂改性,TiO2用X衍线衍射、紫外-可见光谱、顺磁共振、X射线光电子能谱和红外光谱等手段表征了催化剂的结构、组成、光学性质.结果表明,经Ti3+与C共掺杂改性后的催化剂表现出高的可见光降解甲基橙活性.复合在催化剂表面的石墨可以增强催化剂对可见光的响应范围, 而Ti3+与氧缺陷形成的掺杂能级则可以提高光生电子的迁移效率.实验表明,两者之间的协同作用促进了其可见光催化活性的提高.
Using ethanol as the carbon source, a series of Ti3＋and carbon co-doped TiO2 samples were suc-cessfully synthesized by an innovative and simple vacuum activation method in a one-step process. The Ti3＋self-doped TiO2 featured a high visible light photocatalytic activity that improved consid-erably following subsequent carbon doping modification of the catalyst surface. The samples were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, electron spin resonance, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The Ti3＋ and C co-doped TiO2 catalyst showed a high methyl orange photo-degradation efficiency under visible light irradiation. The doping levels induced by Ti3＋and oxygen vacancies were responsible for the improved visible light response of TiO2. Simultaneously, the surface coverage of graphite on the catalyst could improve the absorption of visible light and migration efficiency of photo-induced electrons. The synergistic effects of Ti3＋self-doping and graphite coverage led to the improved visi-ble light photocatalytic activity of Ti3＋and C co-doped TiO2.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第9期1511-1519,共9页
基金
国家自然科学基金(2013CB632403,21237003,21073060,21203062)
国家重点基础研究发展计划(973计划,2011CB808505)
上海市科学技术委员会资助项目(12230705000)
上海市优秀技术带头人计划项目(12XD1402200)~~
