基于卤化氧铋的碳量子点复合材料的制备及其增强光催化性能研究

项目名称： 基于卤化氧铋的碳量子点复合材料的制备及其增强光催化性能研究

项目编号： No.21471069

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 张岐

作者单位： 江苏大学

项目金额： 90万元

中文摘要： 新型无机固体功能材料的构筑及性质研究受到了广泛的关注。本课题拟设计一系列含有长碳链烷基咪唑、季铵等卤素反应型离子液体。以反应型离子液体为反应源、模板剂和分散剂，通过原位引入碳源和铋源的方法，可控合成碳量子点/卤化氧铋复合光催化材料。在反应体系中，反应型离子液体起到表面活性功能和卤素控制释放功能。该复合光催化材料将碳量子点的吸附性能、良好的电子传输能力和上转换光学性质与卤化氧铋半导体材料良好的光催化性能相结合，实现石油化工污水中苯酚等酚类有机污染物的高效可见光催化降解。运用系统的表征方法对碳量子点/卤化氧铋复合光催化材料的组成、结构与酚类污染物降解活性之间的内在关系及污染物降解的动力学模型进行研究。通过原位谱学研究反应过程中复合光催化材料降解酚类污染物的降解机理。

中文关键词： 离子液体；卤化氧铋；碳量子点；光催化；石油化工酚类废水

英文摘要： Constructing and property studying of novel inorganic solid functional materials have received widely attention. This program is designed to prepare halogenic reactable ionic liquids which are composed of longer alkyl grouping carbon chain cations and halogenic complex anions. The carbon quantum dots/bismuth oxyhalides complex materials will be synthesized through a one-pot in situ process in the presence of reactable ionic liquid, and the halogenic complex reactable ionic liquids acted as reactant, template and dispersing agent at the same time. In the reaction system, the reactable ionic liquids played the surfactivity ability and the controlled release of halogenic ion ability. The carbon quantum dots/bismuth oxyhalides complex materials will coupled the adsorption, dispersion, well electron transport and upconverted PL properties of carbon quantum dots with the favourable photocatalysis of semiconductor in order to achieve efficient degradation of phenols in water under the visible light irradiation. The structure-activity relationships of the carbon quantum dots/bismuth oxyhalides photocatalyst will be studied in details. The dynamical model and possible photocatalytic mechanism for degradation of phenols pollutants will be investigated with the in situ spectroscopy.

英文关键词： ionic liquids;bismuth oxyhalides;carbon quantum dots;photocatalysis;petrochemical wastewater