类石墨烯态C3N4光催化材料的合成、改性及其性能研究

项目名称： 类石墨烯态C3N4光催化材料的合成、改性及其性能研究

项目编号： No.51303079

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 寇佳慧

作者单位： 南京工业大学

项目金额： 25万元

中文摘要： 近年来，很多研究者致力于研究提高C3N4光催化材料的活性。虽然目前的研究取得了一定的进展，但是如果想在实际中应用，活性还远远不够。从理论上讲，合成石墨烯态的C3N4光催化材料有助于其光催化性能的提高。但是目前关于此方面的研究非常少，并且研究中还存在着明显的不足：（1）石墨烯态C3N4的收率低，缺陷多；（2）由于尺寸效应的影响，石墨烯态C3N4的带系变宽，可见光光吸收变弱。针对上述问题，本项目提出（1）使用具有特殊表面能的溶剂，削弱C3N4层间范德华力，并借助超声波或者高温的作用，高效快速的合成出具有类石墨态的C3N4。（2）利用金属表面等离子体共振原理，增强所合成出的石墨态的C3N4光催化材料在可见光区域的吸收，从而提高其光催化活性。（3）用所合成出的光催化材料来催化降解目前急需降解的有毒有害物，并从分子水平上揭示此材料的光催化反应性能。

中文关键词： 氮化碳；石墨烯；等离子共振；可见光；光催化水泥

英文摘要： In the recent years, many researches were focused on the enhancing of photocatalytic activity of C3N4. Though C3N4 has considerate activity now, it is difficult to use it in practical application. Theoretically, the graphene-like morphology of C3N4 is helpful to enhance its activity, but the relative investigation is rare, and the current results are not good enough. (1) The yield of graphene-like C3N4 is low, and has a large amount of defect; (2) The band gap of graphene-like C3N4 become larger because of the effect of size, which conduce to the weaker visible light response. According to those points, we propose: (1) The solvent whose surface energy matches that of graphene-like C3N4 will be used to reduce the strength of the van der Waals attraction between the layers in C3N4. (2) The visible-light-response of as-prepared graphene-like C3N4 will be improved using plasmonic theory, thereby the photocatalytic activity will be enhanced. (3) The poison organics will be photodegraded on as-prepared photocatalysts, and the difference of activity will be investigated in detail.

英文关键词： C3N4；graphene；plasmonic；visible light；Photocatalytic cement