掺Fe3+A-TiO2的合成及其对酸性红B的光催化降解性能

摘要

Fe3+-doping A-TiO2 photo-catalyst was prepared via hydrothermal process using titanyl sulfate and FeCl3·6H2O as raw materials.The structure was characterized by FT-IR and XRD.The photo-catalytic performance was studied using ultraviolet lamp(λ=365 nm) as illumination device and acid red B as stimulant pollutant.The results indicated that Fe3+ doping into A-TiO2improved the photo-catalytic performance of TiO2, and when the amount Fe3+-doping was 0.2 mol%, the photo-catalytic activity of A-TiO2 was the best.The best degradation rate of acid red B was achieved 95.11% under the following optimal conditions: acid red B's initial concentration was 10 mg·L-1(pH=5), amount of Fe3+-doping was 0.2 mol%, and catalyst dosage was 400 mg·L-1, irradiation by UV-light at 20 ℃ for 40 min.%以硫酸氧钛和FeCl3·6H2O为主要原料,采用水热法合成了掺Fe3+的纯锐钛矿型A-TiO2催化剂,其结构经FT-IR和X-射线衍射表征.以波长365 nm紫外灯为光源,酸性红B为降解对象,研究了其光催化降解性能.实验结果表明:掺Fe3+有利于提高TiO2的催化性能,当掺Fe3+量为0.2 mol%时,A-TiO2的光催化性能最强;当掺Fe3+A-TiO2投放量为400 mg·L-1,于20 ℃降解时间40 min,对10 mg·L-1酸性红B溶液(pH=5)的降解率最大(95.11%).