TiO_2-沸石光催化材料对水中Cr(Ⅵ)和甲醛的共降解研究  

Research on Degradation of Aqueous Cr(Ⅵ) and Formaldehyde Simultaneously by TiO_2-Zeolite Photocatalytic Materials

作　　者：胡小龙[1] 孙青[1] 徐春宏[1] 郑水林[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《中国粉体技术》2015年第5期69-71,共3页China Powder Science and Technology

摘　　要：以TiCl4为前驱体,沸石为载体,采用水解沉淀法,制备一种纳米TiO2-沸石复合光催化材料,通过X射线衍射、扫描电子显微镜对复合材料的结构与形貌进行表征,并考察沸石负载TiO2催化剂对水中Cr(Ⅵ)和甲醛的降解实验。结果表明,Cr(Ⅵ)-甲醛共存体系中Cr(Ⅵ)和甲醛的降解率均比Cr(Ⅵ)和甲醛单一体系中的降解率大,Cr(Ⅵ)和甲醛之间存在协同降解作用。The nano-meter TiO2-zeolite composite photocatalytic materials were prepared by the method of hydrolysis precipitation, using TiCl4 as the precursor and zeolite as the carrier. The structure and morphology of the composite materials were characterized by XRD and SEM. The experiments for degradation of aqueous Cr（Ⅵ） and formaldehyde by zeolite coated with TiO2 were investigated. The results show that the degradation efficiencies of Cr（Ⅵ） and formaldehyde in the coexisting system are higher than those of in single system. There exists coordination degeneration function between Cr（Ⅵ） and formaldehyde.

关 键 词：沸石 纳米TIO2 铬离子 甲醛 降解 

分 类 号：TB332[一般工业技术—材料科学与工程]