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
nature and modified V-bearing rutile, environmental properties, photocatalyst, halohydrocarbon, organic pollutant, deg- radation method.
