黑电气石/TiO_2/稀土离子(Nd^(3+),Gd^(3+))复合材料的光催化性能研究

Photocatalytic Properties Research of Schorl/TiO_2/Rare Earth Ions(Nd^(3+),Gd^(3+)) Composite Photocatalysts

通过光降解甲基橙实验,研究了利用溶胶-凝胶法制备出的黑电气石/TiO2/稀土离子(Nd3+,Gd3+)复合材料的光催化效率。探讨了黑电气石掺量、稀土离子(Nd3+,Gd3+)掺量和甲基橙初始浓度对降解率的影响,并分析了黑电气石和稀土离子对光催化反应的作用机理。结果表明,黑电气石和稀土元素的加入显著提高了TiO2的光催化效率,复合材料对甲基橙的最高降解率比纯TiO2提高了约26%。Nd3+、Gd3+与黑电气石的最佳掺量分别为0.15%、0.10%和1.5%。

In this paper, the effect of composite materials prepared by sol-gel method was studied by the photodegradation of methyl orange experiments. This research discussed the impact of the doping amount of schorl, rare-earth ions （Nd3＋, Gd3＋） and the concentration of methyl orange on the degradation rate, and analyzed the mechanism of schorl and rare-earth ion on photoeatalytic reaction. The results indicated that photocatalytic efficiency could improve significantly by adding sehorl and rare-earth element. And the highest degradation rate of composite materials could improve by approximately 26% than pure TiO2. The optimal doping amount of Nd3＋, Gd3＋, schorl were 0.15%, 0.10%, 1.5%, respectively.