以稻壳为模板合成Co-TiO_2-SiO_2光催化降解染料  

Synthesis of Photocatalytic Mesoporous Co-TiO_2-SiO_2 by Rice Husk as Template and Silicon Source

作　　者：缪应纯[1] 何琼[1] 李正贤 赵殊[1] 杨国兵[1] 

机构地区：[1]曲靖师范学院化学化工学院,曲靖655011 [2]曲靖市两江口污水处理厂,曲靖655000

出　　处：《材料导报（纳米与新材料专辑）》2010年第2期185-187,191,共4页

基　　金：云南省教育厅科学研究基金(09Y0392);曲靖师范学院科学研究基金(2009QN032);曲靖师范学院分析化学优质课基金(TD200901);云南省物理化学重点学科建设项目

摘　　要：以稻壳为模板和硅源制备Co-TiO_2-SiO_2介孔材料,研究了太阳光下对罗丹明B和龙胆紫染料的光催化活性,探讨了相同条件下SiO_2、Co-SiO_2、TiO_2-SiO_2的催化活性。结果表明,Co-TiO_2-SiO_2在太阳光下对罗丹明B和龙胆紫的催化活性明显高于SiO_2、Co-SiO_2、TiO_2-SiO_2,降解率分别为70%和58%。更重要的是Co-TiO_2-SiO_2对蒽醌结构的染料罗丹明B的降解活性远远高于对苯环结构染料的龙胆紫的催化活性。Mesoporous Co-TiO2-SiO2 is successfully synthesized by rice husk as a template and silicon source and used for the photodegradation of Rhodamine B and gentian violet under solar light. SiO2, Co-SiO2, TiO2-SiO2 are also synthesized by rice husk as a template and silicon source and used for the photodegradation of Rhodamine B and gentian violet under the same conditions. It is found that mesoporous Co-TiO2-SiO2 exhibits higher photoactivity than SlOe, Co-SiO2, TiO2-SiO2 and the photodegradation yields are 70% and 58% for Rhodamine B and gentian violet respectively. Moreover, the photoactivity of mesoporous Co-TiO2-SiO2 for Rhodamine B with xanthene structure is significantly higher than that for gentian violet with phenyl structure under the same conditions.

关 键 词：稻壳 生物模板 Co-TiO2-SiO2 介孔材料 光催化 

分 类 号：O643.36[理学—物理化学]