Enhanced Photocatalytic Behaviors of TiO2 Nanocomposites Doped with CdSe Quantum Dots
作者单位：Department of Chemistry and Life SciencesXianning University State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine(MOE)College of Chemistry and Molecular SciencesWuhan University Key Laboratory of Catalysis and Materials Science of Hubei ProvinceSouth-Central Nationalities University
会议名称：《科技引领产业、支撑跨越发展——第六届湖北科技论坛》
会议日期：2011年
学科分类：081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
关 键 词：CdSe quantum dots doped TiO2 photocatalysts
摘 要：CdSe quantum dots（QDs）-doped TiO photocatalysts were synthesized by a facile sol-gel method at room temperature and characterized by fluorescence spectroscopy,UV-vis diffuse reflectance spectroscopy, Hadamard transform imaging microscopy,FT-IR,XRD,FE-SEM,HRTEM,XPS and nitrogen sorption spectroscopy. The photocatalytic activities were investigated by degrading malachite green（MG） in aqueous solution under visible light *** results revealed that the catalysts doped with CdSe QDs exhibited much higher photocatalytic activities than both controlled TiO（without doped QDs） and P25（TiO,Degussa）.According to the structural and surface analyses,the enhanced photocatalytic activities could be attributed to its strong absorption and low recombination rate of the electron-hole pairs because of the heterojunction formed by CdSe QDs and *** the adsorption isotherms demonstrated the Langmuir type *** study presented new types of photocatalysts for environmental applications.