掺铁TiO_2-活性炭复合材料的制备及其光催化活性  

Synthesis and Photocatalytic Activity of Fe-doped TiO_2-Activated Carbon Composite Materials Response to Visible Light

作　　者：甘礼华[1] 刘明贤[1] 张霄英[1] 陈龙武[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《同济大学学报（自然科学版）》2008年第4期538-542,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(20473057;20673076);上海市科委纳米专项(0452nm088;0652nm030)

摘　　要：通过浸渍法将掺铁TiO2溶胶负载到活性炭上制备掺铁TiO2-活性炭复合光催化剂材料,并对其结构特征、吸附特性、可见光光催化活性和再生性能进行研究.结果表明,掺铁TiO2-活性炭复合材料具有很大的比表面积,对有机污染物具有优越的吸附性能,而其比表面积则随着掺铁TiO2-活性炭的质量比的增大而逐渐减小.在可见光下,复合光催化剂材料由于Fe3+的引入TiO2中,对亚甲基蓝溶液具有高的光催化活性,其中经过500℃热处理的载钛量为5%(质量分数)的复合光催化剂材料的光催化活性最佳.复合光催化剂具有优越的再生性能,经再生处理可多次重复使用.Fe-doped TiO2-activated carbon composite photocatalyst materials were synthesized by immersing activated carbon into Fe-doped titania hydrosols, and their structural characterization, adsorption property, visible-light photocatalytic activity and regenerative ability were also investigated. It is found that Fe-doped TiO2-activated carbon composite materials have a good adsorption capability of the adsorption of organic pollutant due to their high specific surface areas, whereas their specific surface areas decrease with the increase of mass ratio of Fe-doped TiO2 and activated carbon. Composite photocatalyst materials display highly photocatalytic activity under visible-light for degradation of methylene blue（MB） owing to the introduction of iron（ Ⅲ ） ion in titanium dioxide. The composite photocatalyst materials prepared from 0.05 of mass ratio of Fe-doped TiO2 to activated carbon and heat treatment at 500 ℃ have optimum photocatalytic activity for MB＇s degradation under visible-light. The composite materials exhibit a remarkable regenerative ability, which makes them reusable.

关 键 词：复合材料 可见光光催化活性 制备 掺铁TiO2溶胶 活性炭 

分 类 号：TQ134.1[化学工程—无机化工]