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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 of increasing its photoactivity. It is found that the heating and quenching treatments enhance visible-light ab- sorption of rutile, especially at 1000 and 1100 ° C. The special properties of the natural rutile have particular capabilities in photocatalytic oxidation, while at 1000 ° C, and quenching at 1000 ° C and 1100 ° C distinctly improve the degradation rate of samples. especially in degradation of halohydrocarbons.