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采用溶胶-凝胶法合成In掺杂TiO_2纳米材料,用XRD、FT-IR以及N_2吸附-脱附等手段对其表征,研究了热处理条件对其结构和光催化性能的影响。结果表明,在不同煅烧温度制备的材料均由锐钛矿型TiO_2组成,且其表面形貌变化不大;随着煅烧温度的提高TiO_2晶粒尺寸逐渐增大,催化剂的比表面积逐渐降低,孔径逐渐增大,在400℃煅烧制得的3%In-TiO_2的比表面积为94.4 m~2/g,平均孔径为10.3 nm,具有最强的光催化能力,经光照30 min后对甲基橙的光催化降解率为43.1%.
The In-doped TiO_2 nanomaterials were synthesized by sol-gel method and characterized by XRD, FT-IR and N_2 adsorption-desorption. The effects of heat treatment conditions on the structure and photocatalytic properties were investigated. The results show that the materials prepared at different calcination temperature are composed of anatase TiO 2, and the surface morphology does not change much. With the increase of calcination temperature, the grain size of TiO 2 gradually increases and the specific surface area of catalyst decreases gradually. The pore size The specific surface area of 3% In-TiO 2 calcined at 400 ℃ was 94.4 m 2 / g and the average pore size was 10.3 nm. The strongest photocatalytic ability of 3% The photocatalytic degradation rate was 43.1%.