Preparation And Photocatalytic Study Of Graphene/titanium Dioxide Loaded Fabrics

In this paper, sol-gel method was employed for preparing reduced grapheme oxide(RGO)/titanium dioxide(TiO2) nanocomposites without any reductants or surfactants.The synthesis of TiO2 and reduction of graphene oxide(GO) was completed by a simple one-pot heating.TEM?XRD?FT-IR was used to analysis microstructure of these samples.GO was partly reduced to RGO and antase TiO2 was produc-ed from RGO/ TiO2 nanocomposites.Compared with pure TiO2 nanoparticles,the ab-sorption edges of the RGO/ TiO2 composites show a slight red shift to longer wavelength,leading an obvious enhanced visible-light absorption.A preferred method was chosen by comparing the photocatalytic effect of RG O/ TiO2 composite fabrics prepared by seven different methods. TiO2 nanoparticles in sample-8 were dispersed uniformly on the RGO sheets indicated by SEM images.The XPS analysis once again proved that GO attached to cotton fabrics were reduced partly.Photocatalytic of different samples were compared under visible light and ultraviolet light,it indicated that photocatalytic effect is better under visible light.Study of the influence between paramenters of single factor and photocatalytic properties of composite fabrics was did on the base of two-pot method.Processing times of GO,the amount of TBOT and HAc,the heating temperature and time w-ere discussed in other cases remains.Optimal parameters were analyzed: 0.015 mol TBOT,0.1molHAc,95? constant 60 min. Composite fabrics treated by GO three times were tested by XRD.The photocatalytic process was analyzed by adsorption k-inetics equations,and even the maximum capacity was calculated.It conforms to ps-eudo-first-order both under visible light and ultraviolet light by equation fitting.