溶胶-凝胶法制备的钛溶胶形态及其光催化性能  

Morphology and photocatalytic performance of titanium sol prepared by sol-gel method

作　　者：曹俊[1] 申兴丛[1] 裘鹏飞 戚栋明[1,2] 

机构地区：[1]浙江理工大学生态染整技术教育部工程研究中心,浙江杭州310018 [2]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《纺织学报》2014年第5期7-12,共6页Journal of Textile Research

基　　金：国家自然科学基金项目(51273182);国家级大学生创新创业训练计划项目(201310338121);浙江省新苗人才计划项目(2013R406034)

摘　　要：采用高分辨透射电镜(HRTEM)、X射线衍射分析(XRD)、粒度分析(DLS)等表征手段对溶胶-凝胶法所制钛溶胶和典型商品粉体TiO2的粒径、晶型和分散状态进行比较和分析,采用紫外-可见分光光度计测试上述TiO2对紫外-可见光的吸收特性,以及对酸性品红6B染料的光催化降解作用。结果表明:溶胶-凝胶法所制钛溶胶颗粒具有典型的锐钛晶型,相对于粉体TiO2,其在水分散液中的表观粒径更小,分散程度更高,分散稳定性更好,因而对紫外-可见光具有较高的选择性吸引特性(紫外屏蔽/可见光透过),对染料分子具有更强的光催化降解作用。Particle size, crystalline state and dispersed state in water of titanium sol prepared via sol-gel method and several typical commodities TiO2 powders were characterized by high resolution transmission electron microscopy （HRTEM）, X-ray diffraction analysis （XRD） and particle size analysis （DLS）. Their UV-visible absorption characteristics and photocatalytic degradation effects to acid fuchsin 6B dye were evaluated by UV-Vis spectrophotometry. It was found that titanium sol particles prepared by sol-gel method possess typical anatase crystalline form. Compared with these TiO2 powders, the titanium sol particles has a high selectivity to UV-Vis （UV shielding - visible through） and a more excellent photocatalytic degradation due to its small apparent particle size and high dispersibility in water medium.

关 键 词：纳米TIO2 钛溶胶 晶型 光催化作用 

分 类 号：TS195[轻工技术与工程—纺织化学与染整工程]