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用溶胶-凝胶法并经氯铂酸的后续热分解后,制得表面修饰铂(Pt)的TiO_2纳米颗粒铂/二氧化钛(Pt@TiO_2)。扫描电子显微镜表征并X-射线衍射分析表明,该锐钛矿TiO_2纳米颗粒的直径约30nm。在紫外线照射下,对Pt@TiO_2和纯TiO_2纳米颗粒降解甲基橙溶液的光催化活性进行了对比研究。结果表明:与纯锐钛矿TiO_2纳米颗粒相比,Pt@TiO_2在降解甲基橙时表现出了更强的光催化活性,紫外光照25min后,用Pt做表面修饰的Pt@TiO_2纳米颗粒对甲基橙的降解率可达92%,具有高效降解水中有机污染物的性能。
After sol - gel method and subsequent thermal decomposition of chloroplatinic acid, Pt (TiO 2) nanoparticle Pt / TiO 2 with surface modification of Pt was prepared. Scanning electron microscopy and X-ray diffraction analysis showed that the anatase TiO 2 nanoparticles had a diameter of about 30 nm. Under UV irradiation, the photocatalytic activities of methyl orange solution degraded by Pt @ TiO_2 and pure TiO_2 nanoparticles were compared. The results showed that compared with pure anatase TiO 2 nanoparticles, Pt @ TiO 2 showed stronger photocatalytic activity when methyl orange was degraded. After 25 min UV irradiation, Pt @ TiO 2 nanoparticle pairs modified with Pt Methyl orange degradation rate of up to 92%, with high efficiency degradation of organic pollutants in water performance.