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首页> 外文期刊>Asian Journal of Chemistry: An International Quarterly Research Journal of Chemistry >Preparation and Photocatalytic Performance of Nano-TiO2/γ-Al2O3 Composites
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Preparation and Photocatalytic Performance of Nano-TiO2/γ-Al2O3 Composites

机译：纳米TiO2 /γ-Al2O3复合材料的制备及光催化性能

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摘要

Nano-TiO2/γ-Al2O3 composites were prepared by sol-gel method when the γ-Al2O3 was employed as support. The structure, surface information and specific surface area of composites were characterized by X-ray diffraction, scanning electron microscopy and Ni adsorption. The photocatalytic performance of composites were appraised using phenol solution as the model pollutant. The result indicated that TiO2 was successfully loaded on the surface of γ-Al2O3 and the particle size of TiO2 increased with the increase of calcination temperature. Influence of calcination temperature, dosage of the composite on the photocatalytic performance were investigated. When the dosage of composites which were calcined at 500 °C was 3 g/L, we found that the degradation rate of phenol solution reached the maximum 45.6 %. After three cycles, the degradation rate of phenol solution decreased about 25 %.
机译：以γ-Al2O3为载体，通过溶胶-凝胶法制备了纳米TiO2 /γ-Al2O3复合材料。通过X射线衍射，扫描电镜和Ni吸附对复合材料的结构，表面信息和比表面积进行了表征。以苯酚溶液为模型污染物，评价了复合材料的光催化性能。结果表明，随着焙烧温度的升高，TiO2成功地负载在γ-Al2O3表面，且TiO2的粒径增大。研究了煅烧温度，复合材料用量对光催化性能的影响。当在500℃下煅烧的复合物的剂量为3g / L时，我们发现苯酚溶液的降解率达到最大45.6％。经过三个循环后，苯酚溶液的降解率降低了约25％。

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