Photocatalytic effect of nature and modified V-bearing rutile  

作　　者：LUAnhuai GUOYanjun LIUJuan LIUFei WANGChangqiu LINing LIQiaorong 

机构地区：[1]SchoolofEarthandSpaceSciences,PekingUniversity,Beijing100871,China

出　　处：《Chinese Science Bulletin》2004年第21期2284-2287,共4页

摘　　要：A natural rutile TiO2, which displays photo- catalysis on degrading halohydrocarbon pollutants, was re- ported. The rutile contains up to 1.22% V2O5 (weight per- cent). Substitutions of Ti by V, as well as Fe, Cu and Zn, re- sult in lattice distortions and defects. Grinding, heating and quenching modify the surface characteristics of rutile, and consequently increase its photoactivity. It is found that the heating and quenching treatments enhance visible-light ab- sorption of rutile, especially at 1000 and 1100 ℃. Ground rutile is effective to degrade tetrachloroethylene and tri- chloroethylene. While, heating at 1000 ℃, and quenching at 1000 and 1100 ℃ distinctly improve degradation rate of samples. The special properties of the natural rutile have particular capabilities in photocatalytic oxidation, especially in degradation of halohydrocarbons.A natural rutile TiO2, which displays photo- catalysis on degrading halohydrocarbon pollutants, was re- ported. The rutile contains up to 1.22% V2O5 (weight per- cent). Substitutions of Ti by V, as well as Fe, Cu and Zn, re- sult in lattice distortions and defects. Grinding, heating and quenching modify the surface characteristics of rutile, and consequently increase its photoactivity. It is found that the heating and quenching treatments enhance visible-light ab- sorption of rutile, especially at 1000 and 1100 ℃. Ground rutile is effective to degrade tetrachloroethylene and tri- chloroethylene. While, heating at 1000 ℃, and quenching at 1000 and 1100 ℃ distinctly improve degradation rate of samples. The special properties of the natural rutile have particular capabilities in photocatalytic oxidation, especially in degradation of halohydrocarbons.

关 键 词：光催化作用 天然金红石 改性金红石 TiO2 卤代烃 降解 有机污染物 

分 类 号：X511[环境科学与工程—环境工程] X131