由金属铋可控合成非计量Bi-O基纳米材料的半导体特性研究

项目名称： 由金属铋可控合成非计量Bi-O基纳米材料的半导体特性研究

项目编号： No.51262001

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 房国丽

作者单位： 北方民族大学

项目金额： 49万元

中文摘要： 金属铋是国际上一种重要的战略稀缺资源，我国储量占世界75%。本项目以国家稀土产业战略为导向，发展具有自主知识产权的低成本、高产率、形貌/尺寸/化学计量比均可控的由块体金属Bi直接合成非计量Bi-O基纳米半导体材料的制备方法；系统研究络合剂、pH值、卤离子浓度、不同阳离子的浓度、电解速率、模板协理控制合成等制备参数对Bi-O基纳米材料最终成分、化学计量比、结构、形貌、尺寸及分布、产率的影响；探讨由块体金属铋直接合成非计量Bi-O基纳米材料的反应机理，建立合成工艺与非计量Bi-O基纳米材料结构-组成-性能之间的关系；研究不同计量比Bi-O基纳米材料的形貌和微观结构对氧空位浓度和载流子迁移率的影响，进而探讨微观形貌、结构对Bi-O基纳米材料光催化性、光致发光和氧离子导电性等半导体特性的作用规律和机制，以期获得具有较高可见光响应或低温下具有较高氧离子电导率的非计量Bi-O基纳米材料。

中文关键词： 非计量Bi2O2.33；光催化；异质结；Bi-M-O；Bi-O-X

英文摘要： Bismuth is one of the important internationally strategical scarce resources, China accounts for about 75% of the total storage of the world. Based on strategy of rare earth industry in China, the preparation method with independent intellectual property right on non stoichiometric Bi-O based semiconductor nanomaterials,which can be accurately controlled synthesized via electrolytic corrosion of bulk bismuth with low cost and good yield, is developed in the research project. The effect of the process parameters on the component, stoichiometric ratio, microstructure, morphology, size and its distribution of the obtained products will be systematically studied. Further, the reaction mechanism of non stoichiometric Bi-O based nanomaterial is discussed to provide evidence for building the relationship of process parameters,structures,components and performances. The influence of morphology and microstructure on oxygen vacancy concentration and carrier mobility is also studied. Then, the effect and machanism of morphology and microstructure in the semiconductor performances is explored. Finally, it is purposed to obtain non stoichiometric Bi-O based nanomaterials with good visible light response or high oxygen ion conductivity.

英文关键词： Nonstoichiometric Bi2O2.33；photocatalytic activity；heterostructures；Bi-M-O；Bi-O-X