碳氮石墨烯/金属氧化物异质结材料的构建及其光催化降解多环芳烃类污染物研究

项目名称： 碳氮石墨烯/金属氧化物异质结材料的构建及其光催化降解多环芳烃类污染物研究

项目编号： No.21507046

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 化学工业

项目作者： 吉海燕

作者单位： 江苏大学

项目金额： 21万元

中文摘要： 运用高效可见光响应光催化材料催化降解持久性多环芳烃类有机污染物的研究是光催化领域的热点问题。本课题拟采用电化学剥离法制备碳氮石墨烯材料；以过渡金属基离子液体为金属反应源、分散剂和表面活性剂，原位构筑碳氮石墨烯/过渡金属氧化物异质结光催化材料。建立碳氮石墨烯的制备方法并分析其物理化学性质；通过离子液体的调变作用，实现过渡金属氧化物在碳氮石墨烯材料表面的原位可控生长和有效分散。探索异质结光催化材料微观结构对多环芳烃类有机污染物光催化降解的影响规律，系统分析组成-结构-性能的相互关系及其调变规律，阐明异质结材料光催化性能的增强机制；实现合成材料的大吸附容量、高光催化性能和可见光响应等多功能集成。深入分析研究碳氮石墨烯/过渡金属氧化物异质结材料光催化性能增强的内在机制及光催化机理。通过原位谱学表征研究多环芳烃类有机污染物光催化降解转化规律及其动力学特性。

中文关键词： 碳氮石墨烯；过渡金属氧化物；异质结；光催化；多环芳烃

英文摘要： Photocatalytic degradation of persistent polycyclic aromatic hydrocarbon organic pollutants with visible-light-active photocatalytic systems is attracting extensive interest. In this project, the carbon-nitrogen graphene is synthesized by electrochemical exfoiation. The carbon-nitrogen graphene/transition metal oxide heterojunction photocatalysts are designed and synthesized by a novel and environmentally route. To manufacture the carbon-nitrogen graphene/transition metal oxide heterojunction photocatalysts, this route develops an ionic liquid system containing metal ions which can play the important roles of solvent, reactant, dispersing agent and template at the same time. It will investigate the synthesis method for carbon-nitrogen graphene materials and study their physical and chemical properties. Through changing metal-based ionic liquids, it is to achieve the transition metal oxide nanoparticles controlled growth and dispersion on the surface of the carbon-nitrogen graphene, which is to carbon-nitrogen graphene/transition metal oxide heterojunction materials with large adsorption capacity and high visible light photocatalytic performance. The relationship between the photocatalytic activity and the structural features of the prepared photocatalysts will be investigated through a systematic characterization analysis. The possible mechanism of photocatalytic degradation for persistent polycyclic aromatic hydrocarbon organic pollutants over carbon-nitrogen graphene/transition metal oxide heterojunction photocatalysts will be proposed. The photocatalytic degradation process and dynamics will be studied in situ spectroscopic characterization.

英文关键词： carbon-nitrogen graphene;transition metal oxide;heterojunction;photocatalysis;polycyclic aromatic hydrocarbon