Fe^(3+)／TiO_2-SiO_2纳米复合材料的制备及对甲基橙的光催化降解

Preparation of Fe^(3+) /TiO_2-SiO_2 Nano-composite Materials and Their Photocatalytic Degradation for Methyl Orange

采用溶胶-凝胶法制备了Si、Fe3+掺杂的Fe3+／TiO2-SiO2纳米复合材料。以10 mg／L甲基橙溶液为目标降解物,研究了Si、Fe3+掺杂量及焙烧温度对复合材料光催化活性的影响。实验结果表明,Si掺杂量3％、Fe3+掺杂量2％,在焙烧温度700℃下制备的复合材料的光催化活性最高。与未掺杂的TiO2相比,光催化活性提高了约2倍。

Fe^3＋/TiO2-SiO2 nano - composite materials with different content of Si and Fe^3＋ were prepared by sol - gel method. The influences of doping quantities of Si and Fe^3＋ and calcining temperature on the photocatalytic activities of the composite materials were investigated using 10 mg/L methyl orange as target degradation substance.The experimental results showed that the composite material had the highest photocatalytic activity when the doping quantities of Si and Fe^3＋ were 3 % and 2 % respectively and calcining temperature was 700℃. The photocatalytic activity was increased twice compared to TiO2 without doping.