一锅法制备包封Pt的介孔TiO_2及其光催化性能  

Encapsulating Pt Nanoparticles in Mesoporous TiO_2 via a One-pot Process with Enhanced Photocatalytic Activity

作　　者：毛韩成 刘娟娟 MAO Hancheng;LIU Juanjuan(School of Materials ＆ Environmental Engineering,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学材料与环境工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2018年第3期78-82,共5页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(21703050)

摘　　要：包封有Pt纳米颗粒(PtNPs)的介孔二氧化钛(TiO_2)复合材料可通过溶胶-凝胶工艺一锅法合成。通过一系列的表征测试表明,被包封的Pt纳米颗粒高度分散在介孔TiO2架构中,同时不影响TiO_2有序介孔结构的形成。光催化性能测试表明,合成的介孔Pt-TiO_2-X复合材料的产氢性能优于浸渍法得到的同类复合材料。另外,在介孔Pt-TiO_2-X复合材料的制备过程中,可通过调节盐酸(HCl)使用量来调控材料在光催化甲醛制取氢气(H_2)反应中H_2的产生量,且Pt-TiO_2-1.0样品产氢效率最佳,6h内产生的H_2可达444.0μmol。Mesoporous TiO2 encapsulating Pt nanoparticles were synthesized via a one-pot sol-gel process.A series of characterizations show that encapsulated Pt nanoparticles are highly dispersed in the mesoporous TiO2 framework,while the ordered mesoscopic structure of TiO2 remains well.The as-synthesized mesoporous Pt-TiO2-X composites exhibit good photocatalytic H2 evolution performances.In addition,the H_2production amount in the photocatalytic reaction of formaldehyde to H2can be controlled by simply adjusting the HCl usage amount in the mesoporous Pt-TiO_2-X composites preparation process.Moreover,the Pt-TiO2-1.0sample shows the optimal H2 production efficiency and the H2 production amount can reach 444.0μmol within 6h.

关 键 词：溶胶-凝胶工艺 介孔Pt-TiO2 复合纳米材料 光催化 

分 类 号：O643.3[理学—物理化学]