以钛酸丁酯溶液为前驱体,采用溶胶-凝胶法制备了不同掺杂量的Fe3+-TiO2干凝胶,在空气气氛中于400℃焙烧2 h,得到锐钛矿相的纳米晶,用TG-DTA,XRD,DRS,FS等手段对其进行了表征.研究结果表明,掺杂铁离子使二氧化钛纳米晶的粒径变小,吸收带边发生红移,荧光峰明显增强.分别以汞灯和氙灯为光源,通过对染料罗丹明B的光催化降解研究,发现掺入0.01%Fe3+-TiO2与纯TiO2相比具有更好的催化活性,掺杂量增大后,光催化降解率反而下降.
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