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以丙酮为溶剂 ,采用水热法在 2 4 0℃合成了表面吸附有机物的纳米TiO2 粉体光催化剂 ,并采用XRD ,TEM ,UV Vis和DRS等技术对催化剂进行了表征 .结果表明 ,合成的纳米TiO2 催化剂在可见光激发下具有良好的光催化降解甲基橙的性能和较好的热稳定性 .经 180 ,2 5 0和 36 5℃热处理后 ,催化剂的晶型和尺寸没有变化 ,但催化剂表面吸附的有机物发生了明显变化 .催化剂表面吸附的有机物、可见光波段的光响应性能和可见光下催化降解甲基橙的效率之间存在良好的关联性 ,催化剂表面吸附适量的有机物可提高纳米TiO2 催化剂在可见光波段的光响应性能 ,从而提高其在可见光照射下催化降解甲基橙的性能
The catalysts were characterized by XRD, TEM, UV Vis and DRS using acetone as solvent and hydrothermal method at 200 ℃ for the synthesis of TiO2 photocatalyst with surface adsorption of organic compounds. The results showed that the synthesized Under the visible light excitation, the nano-TiO2 catalyst has good performance of photocatalytic degradation of methyl orange and good thermal stability.With the heat treatment of 180, 250 and 365, the crystal form and size of the catalyst have not changed, but the catalyst There is a clear relationship between the organic matter adsorbed on the surface of the catalyst, the photoresponse of the visible light band and the efficiency of the catalytic degradation of methyl orange under visible light, and the adsorption of a suitable amount of organic substance on the surface of the catalyst can improve the photocatalytic activity of the nano-TiO2 catalyst In the visible light band photoresponse performance, thereby enhancing its ability to catalyze the degradation of methyl orange under visible light irradiation