超临界乙醇流体制备TiO_2光催化剂(Ⅰ)合成与光催化性能  

PREPARATION OF PHOTO-CATALYTIC TiO_2 BY SUPERCRITICAL ETHANOL (Ⅰ) SYNTHESIS AND PHOTOCATALYSIS

作　　者：黄彪[1] 

机构地区：[1]福建农林大学材料工程学院,福建南平353001

出　　处：《化工学报》2003年第9期1315-1318,共4页CIESC Journal

基　　金：国家留学基金资助项目~~

摘　　要：Photo-catalytic TiO 2 was prepared from tetraisopropyl titanate (TPT) in supercritical ethanol. It was found that TPT in supercritical ethanol could be effectively converted into the anatase-form of TiO 2 crystallites. The anatase-form of TiO 2 as a photo-catalyst was evaluated for its adsorptivity and subsequent photo-catalytic activities on formaldehyde, one of the harmful air pollutants in the environment. As a result, the supercritically treated TiO 2 had a high decomposing ability. Under the same condition, the experiment was repeated for 5 times,and photocatalysis of the samples did not decrease. This indicated that the supercritical treatment was effective to prepare photo-catalytic TiO 2, which was feature by stability, longevity and high photo-catalytic decomposition of formaldehyde for environmental cleaning. Meanwhile, unlike conventional chemical reaction, which is complex and time-consuming, supercritical treatment is easy to operate, saving both time and labor.Photo-catalytic TiO 2 was prepared from tetraisopropyl titanate (TPT) in supercritical ethanol. It was found that TPT in supercritical ethanol could be effectively converted into the anatase-form of TiO 2 crystallites. The anatase-form of TiO 2 as a photo-catalyst was evaluated for its adsorptivity and subsequent photo-catalytic activities on formaldehyde, one of the harmful air pollutants in the environment. As a result, the supercritically treated TiO 2 had a high decomposing ability. Under the same condition, the experiment was repeated for 5 times,and photocatalysis of the samples did not decrease. This indicated that the supercritical treatment was effective to prepare photo-catalytic TiO 2, which was feature by stability, longevity and high photo-catalytic decomposition of formaldehyde for environmental cleaning. Meanwhile, unlike conventional chemical reaction, which is complex and time-consuming, supercritical treatment is easy to operate, saving both time and labor.

关 键 词：甲醛 超临界乙醇 TIO2 光催化活性 

分 类 号：TQ031.2[化学工程]