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.
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
