金属-ZnO复合纳米晶的合成及光催化性能研究

项目名称： 金属-ZnO复合纳米晶的合成及光催化性能研究

项目编号： No.21201001

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 李鹏

作者单位： 安徽大学

项目金额： 25万元

中文摘要： 本项目拟在纳米尺度上对超细金属纳米粒子（<5nm）和ZnO纳米材料进行合理组合，有效集成二者的光、电性质，期望获得具有高光催化活性的金属-ZnO复合纳米结构。探索反应条件温和的液相合成技术，调控合成具有特定形貌的高质量超细金属（Pt、Cu、Ni及AuCu合金等）-ZnO复合纳米结构，并以此为结构基元构筑具有多孔结构的三维（3D）组装体。在此基础上，研究复合纳米晶微观结构（尺寸、组成、接触界面及暴露晶面等）以及三维超结构与催化活性的构效关系，在原子、分子层次上研究和理解其催化过程的本质，为开发具有稳定界面结构、高接触面和不同暴露晶面的高效的复合型光催化纳米材料奠定基础。

中文关键词： 金属；氧化锌；金属氧化物；纳米材料；光催化

英文摘要： In this project, the fabrication of metal-ZnO hybrid nanostructures, in which ultrafine metal nanoparticles(less than 5nm) and zinc oxide nanocrystals are rationally combined at the nanoscale, would merge their optical and electrical properties and provide the potential for exploration of high efficient photocatalytic materials. The mild solution-based strategies will be introduced for the controlled synthesis of high-quality ultrafine metal(Pt, Cu, Ni and AuCu alloy)-ZnO hybrid nanostructures with well-defined facets, uniform size and shape. In addition, the as-prepared hybrid nanocrystals can also be used as 'artificial atoms' to fabricate three-dimensional (3D) porous superstructures based on the bottom-up assembly strategy. Subsequently, the structure-activity relationships of hybrid nanocrystals and their assemblies will be investigated in details. By understanding the essence of the catalytic reaction at the atomic or molecular level, the as-obtained hybrid nanocrystals with robust interfaces, maximized interface area and the different exposed crystal facets, would serve as excellent nanocatalysts with high activity and stability.

英文关键词： metal；ZnO；metal oxide；nanomaterials；photocatalysis