Fe3+,Ce3+共掺杂纳米TiO2的制备及其光催化性能

 以溶胶-凝胶法制备Fe³⁺,Ce³⁺共掺杂的纳米TiO₂光催化剂.研究了不同的三价铁、三价铈掺杂量及烧结温度对日光灯照射下TiO₂光催化降解甲基橙性能的影响.结果表明,Fe³⁺,Ce³⁺共掺杂能抑制TiO₂晶粒的生长,并使TiO₂的吸收带边明显红移约100nm;在普通日光灯下,共掺杂样品光催化效果优于单掺样品,Fe³⁺和Ce³⁺共掺杂对提高TiO₂在可见光下的催化活性具有协同效应,最佳掺杂量物质的量比为n(Fe³⁺):n(Ce³⁺):n(TiO₂)=0.005:0.015:1,最佳烧结温度为650℃.

Preparation and photocatalytic property of Fe3+,Ce3+ co-doped TiO2 nanoparticles

Fe³⁺,Ce³⁺ codoping TiO₂ photocatalysts (Fe³⁺,Ce³⁺TiO₂) were prepared by sol-gel method.The influence of difference content Fe³⁺,Ce³⁺ and sintered temperature on the degradation methyl orange under fluorescent light irradiation are investigated.The results show that the doping of Fe³⁺,Ce³⁺ can resist the growth of TiO₂ crystal size and the spectrum absorption of the band edge red-shift about 100nm.The results demonstrate that the photocatalytic activity of Fe ³⁺,Ce³⁺TiO₂ is better than that of Ce³⁺ or Fe³⁺ doped TiO₂,Ce³⁺ and Fe³⁺ codoping possesses the synergistic effect. In this paper, the best mole ratio of n(Fe³⁺ ):n(Ce³⁺):n(TiO₂) is 0.005:0.015:1 and the optimum sintered temperature is 650℃.