可见光响应的新型石墨烯-TMDs基纳米复合材料光催化处理水体中难降解有机污染物的机理研究

This project is aimed at the problems existing in currently photocatalytic treatment of persistent organic pollutants in water. By using graphene and transition metal dichalcogenides (TMDs) as the precursor, a new kind of materials of nanocomposites based on graphene-TMDs will be synthesized and researched. This kind of nanocomposites make full use of the advantages of structure and physicochemical properties of graphene and TMDs, namely, layer structure contributing to the migration of photogenerated carriers, adsorption and enrichment of organic pollutants and visible light absorption. The nanocomposites maybe exhibit high efficiency and good stability and they are responsive to visible light. Then the nanocomposites are applied to the photocatalytic treatment of persistent organic pollutants. The forming mechanism, properties and the relationship of performance with their structures are deeply explored. The migration and transformation, the degradation mechanism of organic pollutants and adsorption-catalytic synergy effect in the photocatayltic process are also systemically studied. And related photocatalytic degradation models of some difficultly degradable organic pollutants are elementarily established. As a result, the semiconductor photocatalytic theory will be enriched accordingly. Significantly, the above research will also provide new theoretical basis and technical support for the design and preparation of novel photocatalysts, and the application in actual wastewater treatment.

本项目针对当前光催化处理水体中难降解有机污染物存在催化效率低、稳定性差以及可见光利用率低等关键问题，拟以石墨烯和过渡金属二硫族化合物（TMDs）为前体，充分利用石墨烯与TMDs层状结构以及物化特性的优点，即层状结构利于可见光吸收、光生载流子的迁移以及有机污染物的吸附富集等，研发一种高效稳定的可见光响应的石墨烯-TMDs基纳米复合光催化材料，并将该复合材料应用于难降解有机污染物的光催化处理。深入探索各种石墨烯-TMDs基纳米复合材料的形成机理，材料性能及构效关系；系统研究有机污染物在光催化降解过程中的迁移转化规律，降解机理和吸附-催化协同效应，初步建立部分难降解有机污染物的光催化降解模型，以进一步丰富半导体光催化降解的相关理论。以上研究将为新型光催化剂的设计和制备以及在实际废水处理中的应用提供理论依据和技术支持。

本项目针对当前光催化处理水体中难降解有机污染物存在催化效率低、稳定性差以及可见光利用率低等关键问题，以石墨烯和过渡金属二硫族化合物（TMDs）为前体，充分利用石墨烯与TMDs层状结构以及物化特性的优点，即层状结构利于可见光吸收、光生载流子的迁移以及有机污染物的吸附富集等，研发了几类高效稳定的可见光响应的石墨烯-TMDs基纳米复合光催化材料，并将这些复合材料应用于难降解有机污染物的光催化处理。深入探索了各种石墨烯-TMDs基纳米复合材料的形成机理，材料性能及构效关系；系统研究了有机污染物在光催化降解过程中的迁移转化规律，降解机理和吸附-催化协同效应，初步建立了部分难降解有机污染物的光催化降解模型。本项目发表SCI论文17篇，授权发明专利17项，培养国家优青1人、省百千万人才1人、主要学科学术和技术带头人1人，优秀硕士论文3人。