水中环境内分泌干扰物的吸附富集光催化降解联合研究

项目名称： 水中环境内分泌干扰物的吸附富集光催化降解联合研究

项目编号： No.21307020

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 环境科学、安全科学

项目作者： 王雅君

作者单位： 中国石油大学（北京）

项目金额： 25万元

中文摘要： TiO2具有强的氧化能力和良好的化学稳定性，是最具有应用前景的一类光催化材料。针对其量子效率低；不能吸收可见光；粉末催化剂难回收等缺点，我们设想在柔性衬底（碳布）上构建石墨烯和类石墨相氮化碳（g-C3N4）修饰的TiO2纳米线阵列，通过石墨烯和g-C3N4的共轭大π键可以实现光生载流子的快速导出，极大提高光催化效率，并实现催化活性向可见光区的扩展；石墨烯大的比表面积有利于提高该复合光催化材料的吸附性能。本项目拟系统考察在石墨烯和g-C3N4修饰下催化剂结构，光化学光物理性质及光催化活性的变化，阐明各部分的协同作用机理；系统研究该复合光催化材料对环境内分泌干扰物（四氯酚）的吸附机制；探讨四氯酚的光催化降解机理和转化过程。该项目的实施可以推动功能材料制备与环境净化研究的发展，具有重要的研究意义。

中文关键词： 可见光催化；TiO2纳米线阵列；g-C3N4；核壳结构；双酚A

英文摘要： TiO2 is one of the most promising photocatalysts because of its outstanding oxidative power and photochemical stability. However, slow reaction rate,poor solar efficiency has hindered the commercialization of this technology. In this project, we intent to synthesize a novel visible light driven composite TiO2 nanowire photocatalyst with high activity and hight adsorption capacity by a graphene and graphite-like C3N4 (g-C3N4) double modification. The visible light photocatalytic activity of the composite photocatalys could be generated by g-C3N4; the photocatalytic activity of the composite photocatalyst could be significant enhanced due to the rapid electron and hole transpoting property of these delocalized conjugated π materials. Moreover, the large specific surface area of graphene can enhance the adsorption capacity of the composite photocatalyst. We intent to reveal the essential relation between graphene modification, g-C3N4 modification and the photocatalytic performance of the as-prepared composite photocatalyst. Reveal the environmental endocrine disruptors (P-chlorophenol) adsorption mechanism of the as-prepared composite photocatalyst. Reveal the photocatalytic degradation mechanism and transformation process of P-chlorophenol. The implementation of this project has important scientific significance o

英文关键词： Visible light driven photocatalysis；TiO2 nanaowire arrays；g-C3N4；core-shell structure；bisphenol A