基于“点击化学”的磁性纳米复合材料可控制备及对偶氮染料吸附机理研究

The combination of iron oxide and GO that take advantage of both the superior properties of GO and magnetite nanoparticles, and provide the potential applications in water treatment. It is still a challenge to precisely control the location of magnetic nanoparticles on the GO sheets and then tailor the properties of resultant hybrids for desired application. "Click chemistry" is considered to be a useful method for the synthesis of nanoparticles and functionalization of surfaces. Using graphene oxide, Fe3O4 magnetic nanoparticles as the raw materials, graphene-based iron oxide magnetic（MGO）nanocomposites will be controllable prepared by "click chemistry"and be characterized by means of SEM、TEM、XRD、AFM、TGA、FT-IR, and VSM measurements in the project, the effect of the different"Click chemistry" method on the size and morphology of the nanocomposites and the location of magnetic nanoparticles on the GO sheets will be investigated. On the basis of the synthesis of different morphologies of the nanocomposites, a study on adsorption characteristics and adsorption mechanism of the MGO nanocomposite towards the azo dyes in waste water will be carried out and the effects of pH，the amount of the nanocomposites, temperature and ionic strength as well as other factors on adsorption characteristics will be investigated.The research results of the project will open up a new "green" way for the controllable synthesis of graphene oxide-based iron oxide magnetic nanocomposites，and will provide a theoretical basis for treating azo dyes pollutants.

氧化石墨烯基铁氧化物磁性纳米复合材料(Fe3O4/GO)是水处理过程中具有巨大应用潜力的吸附材料,其吸附性能与其结构、尺寸和形貌等微观特征密切有关。本项目拟通过"点击化学"可控制备Fe3O4/GO磁性纳米复合材料；利用SEM、TEM、XRD、AFM、TGA、FT-IR、VSM等多种测试仪器表征其形貌、结构、组成以及磁学性质；研究不同"点击化学"途径对复合材料微观结构、尺寸、形貌及磁性铁氧化物在氧化石墨烯表面负载量的影响规律；在此基础上，考察其对水中偶氮类染料吸附性能以及pH、温度、浓度、离子强度等因素对其吸附行为的影响，以期获得材料结构及影响因素对吸附性能的影响规律以及吸附机理，建立高容量、高选择性吸附剂表面结构调控方法。通过以上研究，有望为Fe3O4/GO 磁性纳米复合材料可控制备提供一种新的"绿色"方法，为开发除难降解的偶氮染料吸附技术提供科学依据。