基于酚类废水光解的磁性煤沥青介孔碳球载Ag@CdSe@BiVO4催化剂可控合成及光解活性增强机理研究

The synergistic action of the specially photoelectric performance of quantum dots is generated by the nano size and unique structure of coal pitch carbon is of great importance for enhancing the photocatalytic activity and stablization of composite photocatalyst. In this work, the composite photocatalyst is used to degrade the phenol pollutant during the course of production of petroleum refining will be prepared by hydrothermal or microwave or ultrasound, et al. The moulding mechanism of special structure coal pitch carbon (mesoporous carbon ball), The electronic transport mechanics, electronic transport path and interface transfer action in magnetic coal tar pitch mesoporous carbon ball-based Ag@CdSe@BiVO4 composite photocatalysts during the photocatalysis process, the electron excitation and transmission in quantum confinement effect of Ag@CdSe, the influence of solution theory in photocatalytic system on photocatalytic efficiency, the thermodynamics, dynamics and related theory of photocatalytic process for degradation of phenol pollutants will be investigated. It will establish the model of degradation on phenol pollutant. And science issue will be intended to explain by the structure-function relationship. The photocatalytic degradation mechanism will be explored for solving practical application problem of composite photocatalysts.

量子点纳米化所产生的特殊光电性能与煤沥青基碳材料独特结构协同作用，对于增强量子点-煤沥青碳复合光催化剂的光催化活性及稳定性具有重要意义。本课题拟采用石油化工生产中的酚类污染废水为主要研究对象，利用水热、微波、超声等技术辅助制备煤沥青碳复合光催化材料。重点研究特殊构效的煤沥青碳的成型机制；研究磁性球型介孔煤沥青碳基负载型Ag@CdSe@BiVO4复合光催化剂催化过程中电子的传输机制、路径及界面传递行为；研究Ag@CdSe电子激发与传输状态；研究光催化体系中溶液理论对光催化效率的影响；研究光催化降解酚类污染物的热力学、动力学过程及相关的理论问题。阐明磁性球型介孔煤沥青碳基负载型Ag@CdSe@BiVO4复合光催化剂的活性和稳定性增强机制，建立其光催化降解酚类污染物的模型；能够从理论上指导和解决磁性球型介孔煤沥青碳基负载型Ag@CdSe@BiVO4复合光催化剂在实践应用中存在的问题。

通过本项目的实施，获得了煤沥青炭、酵母菌炭、石墨烯量子点以及三维石墨烯等优质炭材料；以BiVO4为光催化剂主体和酵母炭为载体，制备了Fe3O4/C/BiVO4和Co3O4/BiVO4/C复合光催化剂；以石墨烯量子点为修饰炭，制备了NGQDs/BiVO4和NGQDs/Ag/BiVO4复合光催化剂；以三维石墨烯为载体，制备出了BiVO4/三维石墨烯和Ag/BiVO4/三维石墨烯复合光催化剂。通过先进测试手段系统研究了复合光催化剂的物理化学性质，利用光催化降解实验研究了复合光催化材料对有机污染物的去除性能和动力学行为，建立了相应的模型，揭示了反应机理。本课题将不同炭材料引入光催化剂体系，提升了BiVO4的光生载流子分离效率及其对污染物的富集能力，实现了有机污染物的高效去除。本项目的顺利实施为炭基光催化剂的制备和应用提供了新思路，为炭材料的开发利用起到了推动作用。