Study On The Property Modulation And Water Purification Characteristics Of Silver-carbon Core/Shell Multifunctional Composite Nanomaterials

Core-shell nanoparticles are composed of cores and shells with different chemical components,providing an ideal platform for the design of composite materials.By adjusting the structure of the core-shell nanomaterial and the composition of each part,the composite design of multifunctional properties can be realized,and even multifunctional coupling can be realized.The carbon shell has the advantages of low cost,good chemical properties,good biocompatibility,stable photothermal performance and strong light absorption.On the other hand,noble metal nanoparticles(NMNPs)have a variety of excellent physical properties,showing significant advantages in plasma photothermal,photocatalytic and enhanced up-conversion luminescence.In this paper,the unique optical properties of metal nanoparticles are combined with the related properties of carbon shells to demonstrate the effects of different carbon thickness on the photothermal properties of silver nanoparticles and their applications in seawater desalination.Secondly,we have systematically studied the application of the composite structure of silver-carbon nanoparticles and up-converted core-shell nanocrystals in the field of photocatalytic water purification by cleverly combining with the unique luminescence characteristics of rare earth on converted core-shell nanomaterials(UCNPs).The main research contents can be divided into the following four aspects:1.Preparation of carbon ball and core-shell silver-carbon nanocomposite structure(Ag@C)and characterization of its composition,structure and morphology,and discussion on the forming mechanism of the composite structure.2.Directly observe the surface plasmon photothermal effect of carbon spheres and Ag@C core-shell nanoparticles synthesized under different conditions,and analyze the influence of key parameters such as carbon shell thickness and absorption characteristics on thermal insulation performance.3.Preparation of Ag@C /AAO composite film and evaluation of its photothermal effect,evaporation rate and heat insulation efficiency and its application in seawater desalination.4.Study on preparation and characterization of Ag@C@Ag core-shell composite nanostructures,rare earth doped Up-conversion core-shell nanostructures and Ag@C@Ag-UCNPs core-shell composite structures and water purification performance.