外加物理场下纳米氧化亚铜颗粒介观生长机理和介观晶体特性

项目名称： 外加物理场下纳米氧化亚铜颗粒介观生长机理和介观晶体特性

项目编号： No.51272209

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 杨志懋

作者单位： 西安交通大学

项目金额： 80万元

中文摘要： 由纳米颗粒取向聚集生成的氧化亚铜（Cu2O）介观结构具有特殊微结构和高比表面积，表现出特异的光催化、气敏传感等性能。常规方法中使用有机表面组装剂引导下纳米颗粒组装成介观聚集体或介观晶体，因残留有机物的存在而严重影响其物理化学性能。本项目拟利用外加强物理场（外电场、磁场）取代有机组装剂，引导Cu2O纳米颗粒取向聚集，直至形成介观晶体，研究强物理场下Cu2O纳米颗粒取向聚集生长的动力学和热力学，确定Cu2O介观晶体的生长条件，揭示外加物理场对介观生长的作用机理，分析形成的介观聚集体和介观晶体表面和内界面的电子结构，阐明其结构对其光电特性、光催化等理化性能的影响规律，建立相应的数理模型，实现性能的调控。研究结果将丰富人们对纳米颗粒取向聚集的介观转变方式的认识，同时将为制备纯净的、结构和形貌可调控的、具有高比表面积的Cu2O聚集体和介观晶体提供理论指导和实验资料，具有重要的理论意义和工程应用前景。

中文关键词： 氧化亚铜；纳米结构；介观晶体；催化性能；葡萄糖传感

英文摘要： Cuprous oxide (Cu2O) mesocrystals, as nanostructures formed by oriented crystallographical nanoparticles, show some excellent physical-chemical properties, such as photocatalysis. Typically, organic surfactants are used as steric agents or assemblers for Cu2O mesocrystals assembly. Unfortunately, organic surfactants that is difficult to be removed and seriously harmful for the physical-chemical properties of Cu2O superstructures and mesocrystals. Therefore, the realization of an organic-agent-free synthesis of clean Cu2O mesocrystals is highly interesting. Therefore, in this project, we first propose of a synthetic method for controling Cu2O mesocrystals assembly and its properties by external physical fields including strong magnetic field and electric filed, for which driving force can lead the effective rotation and oriential aggregation of these Cu2O nanoparticles or clusters due to abundant dangling bonds. The main ponits of investigation is summarized as follows: (i) study the meso-growth mechanism of cuprous nano-oxides under external physical fields; (ii)characterization of the microstructure and electronic structure of Cu2O superstructures and mesocrystals; (iii) exploration the relationship of the structure and properties of Cu2O mesocrystals. Furthermore, the mechanism of controlling the structure and

英文关键词： Cupric Oxide；Nanostructures；Mesocrystals；photocatalytic activity；Glucose Biosensor