以钛酸四丁酯为钛源,H 2 PtCl6·6 H 2 O 为Pt 源,采用溶胶-凝胶法制备了高性能可见光 Pt/TiO 2光催化材料.采用 XRD 和 UV-Vis 对制备样品进行了表征.XRD 结果表明,制备 TiO 2为锐钛矿相结构, Pt 的加入未改变 TiO 2的晶相结构,且未发现 Pt 的相关衍射峰.UV-Vis 测试结果表明,0．6％Pt/TiO 2样品表现出较好的可见光吸收性能.在可见光条件下,以亚甲基蓝溶液为模拟污染物对 Pt/TiO 2的光催化性能进行考察.实验结果表明,随 Pt 掺杂量增加,亚甲基蓝降解速率常数先增大后趋于平缓,0．6％Pt/TiO 2的光催化效率最高.采用 XPS 对 Pt/TiO 2样品产生可见光催化活性的机理进行了分析.
Using H 2 PtCl6 · 6 H 2 O and tetrabutyl titanate as Pt and Ti precursors,high performance Pt/TiO 2 visible light catalytic materials were successfully fabricated by sol-gel method.XRD and UV-Vis spectra were adopted to characterize the samples.XRD results indicated that the TiO 2 was anatase structure and the Pt-do-ping did not change the phase structure of TiO 2 and no characteristic diffraction peaks of Pt species were detec-ted.UV-Vis spectra showed that 0.6%Pt/TiO 2 exhibited good visible light absorption.Methylene blue was used as the model pollution agent to evaluate the visible light activity of Pt/TiO 2 .The results showed that with in-creasing the Pt doping amount,methylene blue degradation rate constant achieved the highest photocatalytic ef-ficiency at 0.6% Pt doping amount,and then kept at a constant level.XPS spectra were adopted to analyze the mechanism of visible light photocatalytic activity.
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