改性A-TiO_2的制备及其紫外光催化降解苯酚的研究  

Study on the Photo-catalytic Degradation of Phenol with Modified Fe^(3+)-doped A-TiO_2 Illuminated by UV Light

作　　者：张一兵[1] 诸陈怡 

机构地区：[1]上饶师范学院化学化工学院,江西上饶334001

出　　处：《化学世界》2015年第7期412-415,423,共5页Chemical World

基　　金：江西省高校教学团队资助项目(赣教高字[2008]100号)

摘　　要：用水热法制备了掺Fe3+的改性TiO2,并对其进行X-射线衍射(XRD)表征分析。研究以自制的改性TiO2对苯酚的光催化降解效果。结果表明:制备的改性TiO2属于锐钛型(即A-TiO2);在优化条件下——室温下(18℃)在50mL,8mg/L苯酚溶液中加入0.1000g掺1.0%(摩尔分数,下同)Fe3+的自制A-TiO2粉末,紫外光照(λ=365nm)反应3h,苯酚的降解率最高,为52.8%;光催化降解苯酚的效果可用一级动力学速率方程描述,掺1.0%Fe3+的A-TiO2比未掺Fe3+的ATiO2光催化降解苯酚的表观反应速率常数提高了413.1%。The modified Fea＋-doped TiO2prepared via hydrothermal method belonged to anatase type （A- TiO2） confirmed by XRD characterization. The photo-catalytic degradation rate of phenol on as-prepared A-TiO2 was investigated. The results showed that the best degeneration rate of phenol was 52.8% under the following optimized conditions： adding 0. 1000 g as-prepared 1.0% （mole fraction） Fe3＋-doped A-TiO2 into 50 mL of 8 mg/L phenol solution, illuminating by UV light （A=365 nm）, and stirring quickly at 18℃ for 3 h. The photo-catalytic degradation of phenol could be described by the first-order kinetics reaction, and the apparent rate constant of photo-catalytic degradation reaction of modified Fe3＋-doped A-TiO2 increased by 413.1 % as compared to unmodified A-TiO2.

关 键 词：苯酚 改性A-TiO2 光催化 降解 动力学 优化条件 

分 类 号：X131.2[环境科学与工程—环境科学]