g-C3N4基异质结构体系可见光电催化降解微囊藻毒素行为、协同及机理研究

项目名称： g-C3N4基异质结构体系可见光电催化降解微囊藻毒素行为、协同及机理研究

项目编号： No.21477050

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 化学工业

项目作者： 施伟东

作者单位： 江苏大学

项目金额： 88万元

中文摘要： 太阳能光电催化降解技术是当前处理环境污染物微囊藻毒素的理想手段之一。系统研究该降解技术，实现光与电协同作用改善降解效率是其相关研究面临的主要问题。本课题拟选用n型可见光响应半导体（WO3、Fe2O3等）光电极与g-C3N4构筑异质结构体系，深入研究反应条件及光电极表面性质对超异质结构体系建构单元特征的调控规律与电子输运的规律；异质结构光电极建构单元特征（如表面性质、生长取向、复合比例及复合方式）对可见光电催化降解MC行为的影响规律；光电催化氧化过程中，外加偏压、电解质溶液成份、污染物初始浓度以及水体参数等对可见光电催化降解MC行为的影响规律；光电催化氧化过程中MC分子的演变历程及规律；异质结构体系光生载流子定向激发、迁移与转化过程的调控规律及其反应的热力学与动力学规律，以实现可见光电催化降解MC过程的优化，为开发出具有实际应用价值的治理MC技术奠定坚实理论基础。

中文关键词： 石墨相氮化碳；异质结构；光电协同作用；可见光电催化降解；微囊藻毒素

英文摘要： Photoelectrocatalytic technology is one of the most promising approaches for microcystin (MC). The important aim is realzing the synergy effects from the light and the electricity. In this project, we will select the n-typed semiconductiors (WO3, Fe2O3, etc.) photoanodes and g-C3N4 to fabricate the heterostructures, deeply study the effects of reaction conditions on the characteristics of basic units of the g-C3N4 and semiconductor heterostructures; the effects of the characteristics of basic units on the visible-light-driven photoelectrocatalytic degradation for MC of g-C3N4 -based heterostructures, the effects of bias voltage, the initial concentration, the water parameter on the visible-light-driven photoelectrocatalytic degradation for MC, the evolvement prcess and rule of MC during the photoelectrocatalytic degradation; the controllable regulation and kinetic (or thermodynamic) law of excitation, migration and transformation of photon-generated carrier of heterostructures during the photoelectrocatalytic degradation, realize the selection and optimization of high-efficency photoelectrocatalytic technology for MC, establish a steady theoretical foundation and provide a suitable structure system for the development of ideal photoelectrocatalytic technology for MC.

英文关键词： g-C3N4;Heterostructures;Synergy Effects between Light and Electricty;Visible-Light-Driven Photoelectrocatalytic Degradation;Microcystin