用溶胶-凝胶法制备的La2O3/TiO2和Nd2O3/TiO2等催化剂,在可见光下降解甲基橙活性顺序为:Nd2O3/TiO2>La2O3/TiO2>Fe2O3/TiO2>TiO2.焙烧温度为500℃的掺Nd为0.7%(摩尔分数)的催化剂活性最高.用XRD、DTG分析了催化剂的晶型结构,探讨了稀土对晶格畸变和催化活性的影响.
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