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以La、Co的氧化物对TiO_2进行改性。用苯为目标物定量评价改性TiO_2的光催化氧化性能,实验结果表明改性TiO_2对空气中高浓度苯光催化氧化的效果优于纯TiO_2的效果,其中La、Co总质量占TiO_2质量lO%的改性物效果最好。表征改性TiO_2结构后,证明TiO_2表面的LaCoO_3是催化活性提高的主要原因,TiO_2自身的光电性能也是催化剂表现高活性的重要因素,并探讨了催化剂结构与光催化氧化苯性能之间的关系。
The modification of TiO_2 with La and Co oxides. The results showed that the modified TiO 2 had better effect on the photocatalytic oxidation of high concentration of benzene in air than pure TiO 2. The total mass of La and Co accounted for 10% The best modified effect. Characterization of the modified TiO 2 structure shows that LaCoO 3 on the surface of TiO 2 is the main reason for the increase of photocatalytic activity. The photocatalytic activity of TiO 2 itself is also an important factor for the high activity of the catalyst. The relationship between the structure of the catalyst and the performance of the photocatalytic oxidation of benzene is also discussed.