静电自组装制备坡缕石负载纳米TiO_2光催化材料  

Preparation of Palygorskite Supported-nano Titanium Dioxide Photocatalysts by Electrostatic Self-assembly Method

作　　者：王程[1,2] 施惠生[1] 郭晓潞[1] 李艳[2] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804 [2]石家庄经济学院材料科学与工程研究所,河北石家庄050031

出　　处：《同济大学学报（自然科学版）》2012年第4期578-582,共5页Journal of Tongji University:Natural Science

基　　金：河北省自然科学基金(E2008000537);河北省科学技术研究与发展指导计划(07215156);河北省自然科学基金-钢铁联合基金(E2009000946);同济大学先进土木工程材料教育部重点实验室青年基金(2010412)

摘　　要：为了实现纳米TiO2的固定化负载,提高材料的光催化性能,选用1维孔结构的坡缕石矿物为载体,以TiCl4为钛源,采用静电自组装方法制备了坡缕石负载纳米TiO2光催化材料.采用XRD(X射线衍射分析)、FT-IR(傅立叶变换红外谱仪)和SEM(扫描电镜)对材料进行分析和表征,采用甲基橙染料评价材料的光催化性能.重点考察了焙烧温度和硅烷偶联剂用量等对材料结构和性能的影响.研究表明:坡缕石负载纳米TiO2复合材料对甲基橙染料具有吸附与光催化的协同作用,采用静电自组装方法可有效提高材料的光催化性能和循环利用性能.Electrostatic self-assembly method （ESAM） was used to prepare palygorskite supported-nano titanium dioxide photocatalysts for the sake of improving the recovery and photocatalytic efficiency of TiO2 with titanium tetrachloride as Ti-precurser. The as-prepared materials were characterized by X-ray diffraction （XRD）, fourier transform infrared spectroscopy （FT-IR）and scanning electron microscopy （SEM）. Methyl orange was used to estimate the photocatalytic acitivity of the materials. The effects of the calcination temperatures and silane dosage on themicrostructure and photocatalytic properties of the samples were investigated. The results show that the palygorskite supported-nano titanium dioxide photocatalysts exhibit a synergistic effect of adsorption and photocatalysis on methyl orange. Photocatalysts prepared by ESAM method exhibit higher photocatalytic activity and recycle ability than that prepared by the traditional method.

关 键 词：静电自组装 坡缕石 纳米TIO2 光催化材料 甲基橙 

分 类 号：O643.36[理学—物理化学]