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采用分步溶胶-凝胶法制备的三元杂化催化剂TiO_2-SiO_2-杂多酸(POMs)在可见光降解工业染料罗丹明B中表现出了高效反应活性.利用时间分辨微波传导(TRMC)和漫反射光谱(DRS)研究了催化剂在可见光区的光催化性能,实验结果表明:在三元杂化催化剂内,二氧化钛和二氧化硅的键合加强了催化剂在可见光区的响应和吸收,二氧化钛和杂多酸的结合提高了反应活性位(空穴-电子对)的稳定性.三元杂化催化剂TiO_2-SiO_2-POMs中组分之间的协同效应促进了可见光光催化性能的提高.
The ternary hybrid catalyst TiO_2-SiO_2-heteropolyacids (POMs) prepared by the step sol-gel method showed high activity in the visible light degradation of industrial dye rhodamine B. The time-dependent microwave conduction (TRMC) Diffuse reflectance spectroscopy (DRS) studies the photocatalytic activity of the catalyst in the visible region. The experimental results show that the bonding of titania and silica enhances the response and absorption of the catalyst in the visible region in the ternary hybrid catalyst. Titanium dioxide and The combination of heteropolyacids improves the stability of the reactive sites (hole-electron pairs). The synergistic effect of the components in the ternary hybrid catalyst TiO 2 -SiO 2 -POMs enhances the visible light photocatalytic performance.