光磁双功能石墨烯基尖晶石纳米晶体的形成机理及性能调控

项目名称： 光磁双功能石墨烯基尖晶石纳米晶体的形成机理及性能调控

项目编号： No.51472035

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 何光裕

作者单位： 常州大学

项目金额： 80万元

中文摘要： 目前通过化学氧化-剥离-还原等方法制备的石墨烯金属氧化物纳米晶复合材料，制备过程污染大、效率低，而且化学氧化引入的过量缺陷和含氧官能团严重破坏了石墨烯的电子结构及晶体完整性，从而影响了复合材料的整体性能和稳定性，很难实现规模应用。本项目面向高效率、低污染、高稳定性的光磁双功能石墨烯基尖晶石纳米晶体的设计与制备，以石墨为原料，采用室温固相合成技术，避免使用强化学氧化剂和超声剥离方法，设计制备新型可磁分离的石墨烯尖晶石纳米晶体杂化材料并研究其光催化性能。通过研究尖晶石纳米晶体在微氧化石墨烯表面的形成过程和生长机理，探索光催化反应机制以及宏观动力学参数，实现对尖晶石晶体微观结构和催化性能的有效调控，并通过便捷的磁分离方法解决工程应用中催化剂难回收再利用的瓶颈问题。为光磁双功能复合材料的规模制备，拓展新型纳米晶体材料在光催化处理污染物及其在工业工程中的应用提供新的思路。

中文关键词： 光磁双功能；尖晶石；石墨烯；晶体生长；缺陷控制

英文摘要： The current preparation of graphene based metal oxide nanocrystal composites through methods such as chemical oxidation-exfoliation-reduction is hard to be applied on a large scale due to the great pollution and low productivity of the process. Meanwhile, the excessive defects and oxygen-containing groups introduced by the chemical oxidation affected the electronic structure and the crystal integrity of the composite, which reduced the overall performance and stability of the material. This project aims to prepare at macroscopic scale the optical-magnetic bifunctional graphene based spinel nanocrystals with high efficiency, low pollution and high stability. Solid-phase synthesis at room temperature is to be used using graphene as starting material, which would avoid using strong oxidation reagent and ultrasonic exfoliation. Visible-light photocatalytic properties of the as-prepared novel magnetically separable graphene based spinel nanocrystal hybrid materials are to be explored. The growth process and mechanism of the spinel nanocrystals on slightly oxidized graphene surface are to be studied to explore the mechanism and macrokinetics parameters of the photocatalytic reaction and realize the effective control of microstructure and photocatalytic properties of the spinel nanocrystals. The facile magnetic separation would be utilized to solve the bottleneck problem of difficult separation and recovery of catalysts in engineering applications. This project will provide new idea for the large scale production of optical-magnetic bifunctional composite material and the expansion of industrial engineering application of nanocrystal materials in photocatalytic degradation of organic contaminants.

英文关键词： Optical-magnetic bifunction;Spinel structure;Graphene;Crystal growth;Defect control