钒掺杂二氧化钛光催化活性研究

Photocatalytic activity of vanadium doped titanium dioxide

二氧化钛凭借优异的光催化性能,越来越受到人们的广泛关注和重视。以钛酸四丁酯为原料,利用水解-水热-干燥/煅烧工艺制备得到未掺杂TiO2光催化剂和掺钒TiO2光催化剂,利用其对甲基橙溶液的降解率做了比较分析。结果表明,以钛酸四丁酯为原料,采用溶胶-凝胶法制备钒掺杂TiO2光催化剂是可行的。制备V/TiO2产品的最佳工艺条件:钒钛质量比为6∶100、水热温度为160℃、水热时间为12 h,120℃下干燥14 h。紫外光照射条件下,甲基橙光催化降解效率达到99.10%,降解时间小于45 min。

TiO2 has attracted more and more attention due to its excellent photocatalytic performance.Undoped TiO2 photocatalyst and vanadium-doped TiO2 photocatalyst were prepared by hydrolysis-hydrothermal-drying/calcination process using tetrabutyl titanate as raw material.The degradation rate of methyl orange solution was compared and analyzed.The results showed that it was feasible to prepare vanadium-doped TiO2 photocatalyst by sol-gel method using tetrabutyl titanate as raw material.The optimal process conditions for V/TiO2 products was as follows:vanadium-titanium mass ratio was 6∶100,hydrothermal temperature was 160℃,hydrothermal time was 12 h and drying at 120℃for 14 h.Under ultraviolet light irradiation,the photocatalytic degradation efficiency of methyl orange reached 99.10%,and the degradation time was less than45 min.