IFD和SCFD在制备纳米TiO_2中的比较研究  

Comparison and Study on IFD and SCFD in the Preparation of Nano-TiO_2

作　　者：樊湘芳[1] 刘万兵[2] 

机构地区：[1]南华大学机械工程学院,湖南衡阳421001 [2]南华大学化学化工学院,湖南衡阳421001

出　　处：《新技术新工艺》2009年第9期111-113,共3页New Technology & New Process

基　　金：湖南省自然科学基金资助项目(05JJ30015)

摘　　要：采用Sol-gel法制备纳米TiO2,对生成的凝胶湿颗粒,分别采用红外辐射(IFD)和超临界流体干燥(SCFD)技术进行干燥,然后对样品进行XRD、SEM及BET表征,同时考察样品对苏丹红Ⅰ的光催化氧化降解活性。测试结果表明,红外干燥法制备的纳米TiO2是锐钛矿和金红石的混晶,粒径10～30nm,对苏丹红光催化降解性能优于采用SCFD法制备的样品。红外干燥法具有干燥时间短、制备步骤简便、无需特殊设备、产品催化活性高等优点。In this paper, Nano-TiO2 was prepared by sol-gel method, and then the wet gel particles that produced by this method were dried by infrared drying （IFD） and supercritical fluid drying （SCFD） technology respectively. After that,the properties of the samples were elaborated by XRD,SEM and BET,meanwhile the photocatalytic oxidization degradation activity of the samples to Sudan red Ⅰ was also inspected. The test results show that the samples prepared by IFD are the mixed crystal of anatase and rutile with diameter range of 10 -30 nm. Compared with SCFD, the photocatalytic degradation activity of the samples produced by IFD on Sudan red is superior to the SCFD sample. The IFD method has the advantages such as short drying time,simple preparation steps,no special equipments needed and high photocatalytic activity.

关 键 词：红外干燥 超临界流体干燥 纳米TIO2 光催化 苏丹红 

分 类 号：O643[理学—物理化学]