TiO_2-分子筛/波纹型陶瓷纤维整体式催化剂的制备及其对气相甲苯光催化性能研究  

Preparation of TiO_2-zeolites/Corrugated Ceramic Fiber Catalysts and Their Photoexcitation Property for Gaseous Toluene

作　　者：李淑芳[1] 朱佳楠 吕雪龙 张文睿[1] 武加峰[1] LI Shufang;ZHU Jianan;L Xuelong;ZHANG Wenrui;WU Jiafeng(College of Chemical and Environmental Engineering, Shandong University ofScience and Technology, Qingdao, Shandong 266590, Chin)

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2018年第3期35-42,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(21770605);青岛开发区科技开发计划项目(2014-1-35)

摘　　要：为获得一种具有吸附及光催化双重性质的复合光催化剂材料,以波纹型陶瓷纤维为基材,以疏水性分子筛为吸附剂,以钛酸丁酯为钛源,通过浸渍焙烧法制备了一系列TiO_2-分子筛/波纹型陶瓷纤维复合光催化剂材料。通过X射线衍射、扫描电镜、紫外-可见漫反射、氮气吸脱附对催化剂的晶体结构、颗粒形貌及吸光度等进行了测试。以3 290mg/m3的气相甲苯为模型污染物,评价了该系列复合催化剂的光催化性能。结果表明:波纹型陶瓷纤维特殊的孔道结构,提供了大的宏观表面积,有利于分子筛和催化剂的负载,解决了内部光照问题。光催化与吸附相结合后比单纯吸附及单纯光催化效果更好,在分子筛负载量为45.52%时表现出良好的吸附性能;在TiO_2负载量为12.97%时,光降解甲苯效果最佳;且研究发现增大再生空速与延长光照时间均有利于催化剂的再生。In order to obtain photocatalyst materials with adsorption capacity and photocatalytic property,TiO2-zeolites/corrugated ceramic fiber composite photocatalyst materials were prepared by impregnation calcination method with corrugated ceramic fiber as the base material,hydrophobicity zeolites as absorbent,and butyl titanate as the titanium source.The crystal structure,particle morphology,optical absorption properties were tested by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,ultraviolet-visible（UV-vis）absorption spectroscopy and N2 adsorption-desorption method respectively.The photocatalytic performance of the composite catalyst was evaluated with 3 290 mg/m^3 gasphase toluene as model pollutant.Results show that the special pore structure of corrugated ceramic provides a large macroscopic surface area,which is beneficial to the load of molecular sieve and catalyst,andhas solved the internal lighting problem.For the treatment effect,the combination of adsorption and photocatalysis is better than simple adsorption and simple photocatalysis.TiO2-zeolites/corrugated ceramic fiber composite photocatalyst materials show good adsorption performance at 45.52% of the molecular sieve.When TiO2 is at 12.97%,the photodegradation of toluene was the best.Moreover,the study found that the increasing speed of regeneration and time of illumination are both beneficial to the regeneration of the catalyst.

关 键 词：TIO2 分子筛 波纹型陶瓷纤维 吸附 甲苯 光催化 

分 类 号：TQ342[化学工程—化纤工业]