摘要
采用溶胶-凝胶法制备了易于固液分离的活性炭(AC)负载磁性光催化剂(TiO2-Fe3O4/AC).样品通过SEM-EDX和X射线衍射法进行表征.通过在紫外光照射下降解亚甲基蓝评价其光催化降解能力.结果表明:负载22%Fe3O4的光催化剂(含20%TiO2和58%AC)的光催化活性最强(120 min时亚甲基蓝的降解率达到87%,是纯TiO2的2.7倍);磁性光催化剂可实现磁分离回收.
Active carbon（AC） loaded magnetic photocatalyst, TiO2-Fe3O4/AC, were prepared by solgel method. The samples were characterized by scanning electron microscopy-energy dispersive X-ray （SEM-EDX） and X-ray diffraction, respectively. The photocatalytic activity was evaluated by degradation of methylene blue in aqueous solution under the irradiation of UV light. The results indicated that the magnetic photocatalyst loading 22% Fe3O4 in mass ratio （ loading 20% TiO2 and 58% AC） showed the highest photocatalytic activity （The photo-degradation yield upon methylene blue after 2 h reached 87%, 2.7 times higher than that of pure TiO2）. The magnetic photocatalyst can be separated from the system by applying magnetic field.
出处
《化学研究》
CAS
2009年第2期83-86,共4页
Chemical Research
基金
国家自然科学基金(90607024)
江苏省滩涂生物资源与环境保护重点建设实验室资助项目
关键词
TIO2
亚甲基蓝
磁性材料
光催化剂
催化降解
TiO2
methylene blue
magnetic material
photocatalyst
catalytic degradation
