SYNTHESIS AND PHOTOTHERMAL ANTIMICROBIAL PROPERTY OF COPPER SULFIDE NANOPARTICLES/CELLULOSE COMPOSITE PAPER

摘要

The NIR absorption of copper sulfide nanoparticles(CuS NPs)is derived from the d-d transition of Cu2+ions.Therefore,CuS NPs,with excellent photothermal conversion property and photothermal stability,was a promising and new type of photothermal agent for sterilization.This study innovatively prepared a photothermal bactericidal composite paper by filling CuS NPs into cellulose nanofiber paper.Differing from previous reports,CuS NPs were prepared with starch molecule as growth template and stabilizing agent in this work.Wherein,copper ammine complex acting as copper source and sodium sulfide acting as sulfide source,without using any other organic solvent,surfactant or reducing agent.The obtained CuS NPs are spherical and stable with diameters of～10 nm.The composite paper shows significant bactericidal behavior with NIR irradiation(808 nm,1.5 W/cm2,2min)