Fe3+,Ce3+共掺杂纳米TiO2的制备及其光催化性能

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

摘要: 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℃.

Abstract: 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℃.