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。

关键词：沸石；纳米TiO_2；铬离子；甲醛降解

Abstract： The nano-meter TiO₂ -zeolite composite photocatalytic materials were prepared by the method of hydrolysis precipitation， using TiCl₄as 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. 

Keywords: zeolite； nano-meter TiO₂； Cr ion； formaldehyde； degradation