可见光响应型碘氧化铋-石墨烯光催化/膜分离耦合水处理体系构筑及降解抗生素污染物的机理研究

It is important to develop nanophotocatalysts with excellent adsorption properties activated by visible light for solving environment pollution from the viewpoints of theory and application. This study is aimed to design and synthesize series of bismuth oxide iodides - graphene photocatalysts composite with excellent adsorption properties, visible-light photocatalytic activities. Their photocatalytic activities will be investigated by photocatalytic degradation of tetraeyeline antibiotic in wastewater under visible light irradiation. Then the synergistic effect and degradation mechanism of adsorption, visible light photocatalytic degradation of antibiotic wastewater on the novel bismuth oxide iodides/graphene composite will be revealed. The membrane filter will be combinated with photocatalysis to solve the problem of the recovery and leakage of the catalysts, and enhance the quality of effluent further. The study will provide not only a new thought and scientific basis for the preparation of the novel graphene/bismuth oxide iodides composite, but also expansion the field of membrane filter application in antibiotic wastewater treatment technique by reducing the operation cost. Moreover, it is of academic importance to promote the overlapping between corresponding disciplines including environment, chemistry, material and etc.

研制和开发新型高效可见光响应型、高吸附性能的光催化材料对解决环境污染具有重要的科学意义和实用价值。本项目利用碘氧化铋和石墨烯为基础，设计合成具有良好吸附-可见光催化性能的碘氧化铋/石墨烯复合光催化材料，研究其可见光催化降解抗生素污染物的催化活性，揭示其吸附-光催化降解抗生素机理，并与膜分离技术结合，彻底解决催化剂的难回收易泄漏问题，同时进一步提升出水水质。对该集成式复合催化剂/膜分离耦合体系的研究，为制备新型可见光催化材料提供崭新的思路和科学依据，扩大了膜分离技术在抗生素废水处理中的应用，降低深度水处理成本，同时也可促进环境、化学和材料等学科的交叉融合，有着重要的学术意义。

本研究的相关成果已发表SCI论文两篇，中文核心期刊2篇，申请专利2项，示范小型装置1套，同时研制成功一系列全新碘氧化铋/石墨烯复合材料。相关成果见附件。.首先，研制一系列不同I/O比例的碘氧化铋光催化纳米材料，将其与吸附材料石墨烯进行复合，同时发挥石墨烯对低浓度有机物的吸附能力和碘氧化铋的催化能力。同时将复合材料与膜过滤过程进行了耦合。系统阐明了复合材料的制备方法、降解过程中的影响因素、降解的中间产物和最终产物，研究了降解动力学；考察了膜材料对过滤过程的影响，考察了过滤过程中的膜污染速率及膜污染的去除方法，分析了膜污染的机理，优化了膜过滤过程的运行条件；阐明了材料的吸附-催化-过滤的交互作用和耦合关系。. 本研究结果已经被多次国内外期刊多次引用，研究结论表明，碘氧化铋-石墨烯光催化/膜分离耦合水处理体系已经成功构筑，并能对水环境中的一些低浓度和高环境敏感性的污染物进行有效去除，该研究为新型可见光催化复合材料及其在新型污水治理中的应用提高了科学依据。.