环境工程学报2013，Vol.7Issue(3)：975-980,6.
碘掺杂TiO2可见光光催化性能研究
Photocatalytic activity of iodine-doped TiO2 under visible radiation
摘要
Abstract
Iodine doped TiO2 and TiO2 were prepared by sol-gel method using n-butyl titanate as titanium source and potassium iodate as iodine source, below 100℃ , and then characterized by XRD, TEM, and XPS. The results showed that TiO2 and iodate-TiO2 were both anatase. According to the characterization results, it was assumed that iodine was absorbed and wrapped on the TiO2 surface or inset into interstices, but not entering in the TiO2 lattice. The degradation of Rhodamine B (RhB) and 4-chlorophenol (4-CP) as probe reactions were used to evaluate photocatalytic activity of catalysts prepared under different conditions. The results indicated that iodine-doped TiO2 calcined under 400℃ with molar ratio nI/nTi =0.05: 1 has remarkably higher photocatalytic activity than the undoped TiO2 at pH = 7 under the visible light irradiation ( λ > 420 nm ). The degradation process was studied by infrared spectrophotometry (IR) and total organic carbon (TOC) , and oxidation species were also detected utilizing benzoic acid by fluorescence analysis method, which showed that · OH was generated to degrade organic compounds.关键词
二氧化钛/碘掺杂/光催化/降解Key words
TiO2 / iodine-doped/ photocatalysis/ degradation分类
资源环境引用本文复制引用
蒋悦,贾漫珂,邹彩琼,罗光富,黄应平,张爱清..碘掺杂TiO2可见光光催化性能研究[J].环境工程学报,2013,7(3):975-980,6.基金项目
国家自然科学基金资助项目(20877048,21177072) （20877048,21177072）
湖北省创新群体项目(2009CDA020) （2009CDA020）
湖北省高等学校优秀中青年科技创新团队计划(T200703) （T200703）
