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溶胶-凝胶法制备复合MxOy-TiO2光催化剂
引用本文:张玉红,熊国兴,杨维慎,傅贤智.溶胶-凝胶法制备复合MxOy-TiO2光催化剂[J].物理化学学报,2001,17(3):273-277.
作者姓名:张玉红  熊国兴  杨维慎  傅贤智
作者单位:State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,The Chin ese Academy of Sciences,Dalian 116023;Research Institute of Photocatalysis,Fuz hou University,Fuzhou 350002
基金项目:国家自然科学基金资助项目( 29392003)及中国科学院重大基础研究项目( KJ951-A1-502)
摘    要:以无机盐TiCl4为原料制备TiO2溶胶,并利用溶胶胶粒修饰法制备SiO2 TiO2、ZrO2 TiO2、WO3 TiO3、MoO3 TiO2及Pt/TiO2光催化剂,用于光催化氧化甲醛反应,考察添加物对 催化剂光催化性能的影响.其中,SiO2 TiO2催化剂的光催化氧化降解甲醛性能最好,而MoO3 TiO2的催化性能最差.SiO2 TiO2催化剂优良的光催化性能可归于SiO2 TiO2催化剂的高 比表面积,高空隙率,小晶粒粒径和强吸光性能等性质的综合影响.

关 键 词:溶胶-凝胶  光催化  甲醛  MxOy-TiO2  
收稿时间:2000-10-08
修稿时间:2000年10月8日

Preparation of MxOy-TiO2 Photocatalysts by Sol-gel Method
Zhang Yu-Hong.Preparation of MxOy-TiO2 Photocatalysts by Sol-gel Method[J].Acta Physico-Chimica Sinica,2001,17(3):273-277.
Authors:Zhang Yu-Hong
Institution:State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,The Chin ese Academy of Sciences,Dalian 116023;Research Institute of Photocatalysis,Fuz hou University,Fuzhou 350002
Abstract:Titania sols were prepared by acid hydrolysis of a TiCl4 precursor and mixed oxides SiO2 TiO2,ZrO2 TiO2,WO3 TiO3 and MoO3 TiO2 as well as Pt/TiO2 catalysts for the photocatalytic oxidation of formaldehyde were obtained by usin g the method of the modification of sol particles.The influence of the additives on the photocatalytic activity was investigated.Comparing with pure TiO2,the ad dition of silica or zirconia increased the photocatalytic activity,while the add ition of Pt and MoO3 decreased the activity,and the addition of WO3 had little e ffect on the activity.Among these catalysts,the activity of the SiO2 TiO2 catal yst was the best while that of the MoO3 TiO2 catalyst was the worst.It is of gr eat significance that the conversion of formaldehyde was increased up to 94% ov er the SiO2 TiO2 catalyst.The increased activity of the SiO2 TiO2 catalyst was due to the higher surface area and porosity,the smaller crystallite size and th e stronger adsorption of UV light.A comparison of our catalyst compositions with those in the literature suggested that the difference in activity due to the ad dition of a second metal oxide maybe caused by the surface chemistry of the cata lysts,particularly the acidity.
Keywords:Sol-gel  Photocatalysis  Formaldehyde  2'  ')  MxOy-TiO2" target="_blank">">MxOy-TiO2
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