TiO2/底泥复合材料的制备及其可见光催化性能评价  

Preparation of TiO2/river sediment composite and its visible light photocatalytic performance

作　　者：谷麟[1] 俞海祥 王宇[1] 王涛 杨文昊 闻海峰[1] 陶红[1] GU Lin;YU Haixiang;WANG Yu;WANG Tao;YANG Wenhao;WEN Haifeng;TAO Hong(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院

出　　处：《复合材料学报》2019年第11期2665-2673,共9页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51408358;51679140)

摘　　要：以河道底泥(RS)为载体,钛酸四异丙酯(TTIP)为前驱体,通过溶胶-凝胶法制备了TiO2/RS复合可见光催化剂,考察了TiO2/RS复合催化剂在可见光下的催化活性、可回收利用性和稳定性。利用XRD、SEM、XPS和BET表征手段对TiO2/RS复合材料的晶型、形貌、表面形态、孔结构等进行表征。通过表征分析发现:相比TiO2,TiO2/RS复合材料具有更丰富的多孔结构,比表面积可增加至98.43m^2/g。模拟含甲基橙印染废水的可见光催化降解实验说明,当RS和TiO2的质量比为0.5时,TiO2/RS复合催化剂在可见光照射下表现出较高的催化活性,反应4h后甲基橙的降解率达到48.8%,且回收循环使用6次后TiO2/RS复合催化剂对甲基橙的降解率仍能保持在45%以上,表现出较强的稳定性。The TiO2/river sediment(RS)was used as the raw materials to synthesize the visible-light catalyst by sol-gel method,in which the RS served as carrier and tetraisopropyl titanate(TTIP)functioned as precursors.The catalytic activity,recyclability and stability of the TiO2/RS composite catalyst under visible light were investigated in depth.The crystal form,morphology,surface morphology and pore structure of TiO2/RS composites were characterized by XRD,SEM,XPS and BET.By catalyst characterization,it is found that the porous structure of the TiO2/RS composite is more obvious than the pure TiO2,and its specific surface area can be increased to 98.43m^2/g.The catalytic ability of TiO2/RS composite with the mass ratio of river sediment to TiO2of 0.5is tested in the visible light assisted degradation systems by using methyl orange as the model pollutant.The results show that the degradation efficiency of methyl orange can reach 48.8%after 4hand the dye removal can remain over 45%after 6cycles of catalyst recycling.

关 键 词：河道底泥 TIO2 复合材料 光催化剂 甲基橙 

分 类 号：TB332[一般工业技术—材料科学与工程]