卤氧化铋-石墨烯复合材料的可控制备及其光催化活性增强机制研究

项目名称： 卤氧化铋-石墨烯复合材料的可控制备及其光催化活性增强机制研究

项目编号： No.21276104

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 张渊明

作者单位： 暨南大学

项目金额： 82万元

中文摘要： 传统的二氧化钛光催化材料只能在紫外光作用下驱动，使其推广应用受到限制。卤氧化铋具有合适的禁带宽度、较高的稳定性和光催化活性，已成为光催化领域的研究热点，目前研究的重点是如何进一步提高其可见光催化活性和稳定性。因此，本项目先将石墨粉依次经过氧化、微波剥离、碱活化和化学还原工序，制备出含可控表面孔洞结构的石墨烯，然后在其表面孔洞中生长卤氧化铋微纳晶粒，构建了表面结构形态可控、性能稳定和可见光催化活性增强的新型卤氧化铋-石墨烯复合材料。研究过程中将解决复合材料表面结构形态的调控问题和其光催化活性增强机制的问题。项目的特色与创新之处体现在：构建一种可见光响应的新型卤氧化铋-石墨烯复合光催化材料；复合材料的表面结构形态具有可调控性；将系统研究其光催化活性增强机制。该项目的研究成果对于提高我国光催化材料的基础研究水平，推动化学化工、环境、材料、能源等学科的发展具有重要意义。

中文关键词： 卤氧化铋；可见光光催化；异质结；固定化膜；光解水

英文摘要： The traditional titanium dioxide photocatalyst, only worked under the uv light, restricted its practical application in environmental improvement. With appropriate band gap, high stability and visible-light photo catalytic activity, the bismuth oxyhalide has become the research focus in the field of photocatalysis. The recent researches focused on how to further enhance its visible-light photocatalytic activity and stability. Therefore, in this project, the graphite powder was processed in turn with oxidation, microwave detachment, alkali activation, chemical reduction, to get a high specific area graphene, and then the bismuth oxyhalide micro-nano particle was growth on the graphene, to construct a visible light response's bismuth oxyhalide-graphene composite with steady performance and enhenced photocatalytic activity. The construction of the graphene with controllable surface structure and the synthesis of controllable morphologies of the bismuth oxyhalide particle will be systematically researched; The influence of the composition, morphology, size distribution, surface structure on the photocatalytic performance and stability will be further explored. Then the project will reveal the enhenced mechanism of the photocatalytic activity to get a novel photocatalyst composite with structure-controllable and exc

英文关键词： Bismuth Oxyhalide；Visible-Light Photocatalysis；Heterojunction；Immobilized Film；Water Splitting