静电自组装制备纳米TiO_2/膨润土复合材料及其光催化性能研究  

Research on the preparation and photocatalytic property of electrostatical self-assembled nano titanium dioxide coposite materials

作　　者：王程[1,2] 施惠生[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200092 [2]石家庄经济学院材料科学与工程研究所,石家庄050031

出　　处：《化工新型材料》2011年第1期55-57,共3页New Chemical Materials

基　　金：河北省自然科学基金(E2008000537);河北省自然科学基金-钢铁联合基金(E2009000946);河北省科学技术研究与发展指导计划项目(07215156)

摘　　要：选用具有优异吸附性的膨润土为载体,采用巯基硅烷偶联剂对膨润土进行干法改性,硅烷偶联剂巯基基团经氧化剂氧化为易电离的磺酸基后,静电自组装制备纳米TiO2/膨润土复合光催化材料。采用XRD对材料的成分和结构进行分析,ESEM对材料微观形貌进行分析,采用甲基橙染料废水评价材料的光催化脱色性能,研究表明:在光照初期,复合材料即对甲基橙染料废水表现出很高的脱色效果。400℃、500℃焙烧产品对甲基橙染料废水具有更好的光催化脱色效果,经1 h降解后,甲基橙染料废水的脱色率分别达到93.17%和91.40%。纳米TiO2均为锐钛矿结构,且均匀地负载于膨润土表面。Silane selbassembled monolayer of （OCH3）3 Si（CH2 ）a SH was modified on bentonite by dry process. The radical of -SH was oxidized to -SO3 H. Electronegative bentonite self-assembled with the titanium polycation on the effect of electrostatic attraction. The nono TiO2/bentonite composite materials was then prepared after been calcined at certain temperature. XRD and SEM were used to research the composition, configuration and morphology of the photocatalysts. The methyl orange wastewater was used to estimate the photocatalysis of the material. The results shown that： the composite photocatalysts showed excellent photodecoloration effect on the MO wastewater in the beginning of illumination, The decoloration rate of MO wastewater been dealt with samples calcined at 400℃ and 500℃ reach to 93.17% and 91.40% which were higher than the others. Anatase particles envenly cover on the surface of the bentonite.

关 键 词：静电自组装 纳米TIO2 膨润土 光催化 

分 类 号：TB383.1[一般工业技术—材料科学与工程]