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采用溶胶-凝胶法制备了稀土元素Pr掺杂的纳米TiO2光催化剂(Pr-TiO2).通过XRD、FT-IR、UV-Vis、TEM等对Pr-TiO2样品进行了表征和分析,并以亚甲基蓝(MB)作为目标降解物,考察了不同热处理温度及不同掺杂量的Pr-TiO2对MB的光催化降解效果.结果表明,Pr掺杂纳米TiO2的晶型为锐钛矿相和金红石相的混晶相,Pr的掺入提高了TiO2光催化活性.当热处理温度为500℃,在pH值为2.5,Pr掺杂量为n(Pr):n(TiO2)=1:300的条件下制备的光催化剂的催化活性显著高于Degussa P25.

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