Preparation Of Ag-based Super-wettable Separation Materials And Study Of Their Catalytic Performanc

Water resources are vital to our human existence and development.Water pollution from oil spills,industrial and domestic sewage discharges has resulted in a severe shortage of clean water resources.It is urgent to solve the problem of oily wastewater worldwide.Currently,superwettable materials have been widely used for the efficient separation of oil-water mixtures and even stable emulsions by manipulating the microstructure and chemical composition.But,the sewage system in real life is complex,and many pollutants coexist,mainly divided into insoluble oil phase and soluble organic pollutants.However,most of the super-wettable materials reported so far can only achieve simple oil-water separation.In this paper,the preparation of super-wettable interface functional materials and their multifunctional water purification research were carried out.The main works are as follows,1)Preparation of Ag-CuO"water removing"separation mesh and its in-situ photocatalytic degradation of dyes.Ag-CuO Heterostructure-Decorated mesh was prepared by simple alkali etching-calcination and photodeposition methods.This mesh can not only achieve efficient separation of oil-water mixture,but also has better photocatalytic performance than single CuO modified mesh in the degradation of organic dyes under visible light.In addition,the omentum has a highly stable cycle,and shows bifunctional water purification properties of oil-water separation and in-situ visible light degradation of water-soluble organic dyes.2)Preparation of Ag/α-Fe₂O₃"water removing"separation mesh and its application in multifunctional water purification.A facile two-step hydrothermal method was used to prepare Ag/α-Fe₂O₃Heterostructure-Decorated copper meshes,benefiting from the small band gap of Ag/α-Fe₂O₃heterostructure,Ag nanoparticles andα-Fe₂O₃intrinsic antibacterial ability,This mesh not only shows excellent oil-water separation ability,but also has enhanced visible light degradation of organic dyes and antibacterial activity compared with Ag-CuO Heterostructure-Decorated mesh.In addition,the mesh showed good bifunctional water purification performance.More importantly,the material has excellent chemical resistance,mechanical stability and long-term cycling3)Preparation of Ag-Cucomposite modified mesh and its multifunctional water purification performance.The bimetallic composite modified mesh was successfully prepared by electrodeposition and in-situ exchange method.The mesh can simultaneously exhibit high-efficiency oil-water separation ability,excellent catalytic reduction performance of water-soluble organic pollutants,and good antibacterial activity.In addition,the mesh exhibits excellent mechanical stability and reproducibility.More importantly,compared with the above two works,the mesh membrane does not need to provide additional energy when catalyzing organic pollutants such as dyes,which not only reduces energy consumption,but also expands the multi-functional water purification application of the material...