石墨烯-SiC颗粒异质结材料的制备和光催化特性研究

项目名称： 石墨烯-SiC颗粒异质结材料的制备和光催化特性研究

项目编号： No.51272279

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： 郭丽伟

作者单位： 中国科学院物理研究所

项目金额： 80万元

中文摘要： 自2004年发现石墨烯以来，基于石墨烯/半导体（或氧化物）复合材料的研究成为新一代光催化材料研究的热点。然而由于这种复合材料制备方法的限制，使其结合界面不是完美的异质结界面，限制了光生载流子的转移性能。所以探索制备方法简单、异质界面完美、成本低廉、光催化性能优异的新型光催化材料成为基于石墨烯复合光催化材料研究的首选和重点。本课题原创了一种加热SiC粉末制备石墨烯包覆SiC颗粒的新型光催化材料，初步发现其光催化性能比纯SiC颗粒提高100%以上。本课题将通过生长工艺的探索，实现可控制备石墨烯/SiC颗粒复合光催化材料；并深入挖掘石墨烯层数、SiC晶粒尺寸和晶型、石墨烯结构构型等物理参数对这种复合材料光催化性能影响的机制；通过不同晶型SiC颗粒复合材料的优化混合，增加光的吸收效率，最大限度提高石墨烯/SiC颗粒复合材料的光催化性能，为解决环境污染和能源短缺问题提供一种新的解决方法和途径。

中文关键词： 石墨烯；SiC 颗粒；异质结；光催化；紫外光

英文摘要： Since the discovery of graphene in 2004, graphene based composition materials have attracted great attention for application in photocatalystics.However,the contact interface between graphene and nano-semiconductor is not a perfect heterojunction interface in current composition materials, which limits transferring of photogenerated carrier in between. Therefore, it is necessary to explore new photocatalysty with simple fabrication procedure, low cost and high performance. Here, graphene covered SiC powder heterojunction material is developed as advanced photocatalysty by high temperature decomposition of SiC powder, whose photocatalystic activity is over 100% improvement compared with that of pristine SiC powder. The finding suggests the composition material has potential for application in photocatalystics. By optimizing growth procedure and performing experimental study in detail, it is expected that growth mechanism, dominent physical parameters for growth of special structural configuration of the composition material and physical mechanism governing its photocatalystic performance could be well understood and revealed. The study will greatly improve photocatalystic performance of the graphene/SiC composition material and provide a new method for making environment-friendly photocatalystic material.

英文关键词： graphene；SiC powder；heterojunction；photocatalytic；ultraviolet