Based On The Morphology Of Halogen Bismuth Oxide And The Compound Synthesis And The Research Of Photocatalytic Performance

With the development of the industry,bringing economic benefits to the people,but bringring serious harm to people's health and to the ecological environments so it is very important to protect the environment.Water is the foundation of all things,so water treatment technology becomes a top priority.In recent years,Photocatalytic technology favored by the majority of researchers because of no pollution,low energy consumption.In this article,we research that based on the morphology of BiOX(X = Cl?Br)and its photocatalytic properties after modification.Bi system has unique electronic structure,high stability,high activity advantages.At present,for halogen bismuth oxide series of light catalyst study,study is relatively small number of BiOCl,BiOBr,because of its wide band gap width,in response to visible light is weak.Aiming at the defect,we seek feasible methods to be modified,hope to be able to improve the efficiency of photons in the visible light have higher response.In this paper,BiOX(X=Cl?Br)photocatalyst and BiOX/Bi2MoO6 composite photocatalyst were synthesized using hydrothermal synthesis method in the presence of PEG-600 with Bismuth nitrate pentahydrate as bismuth source and KC1mNaBr,Na2MoO4�2H20 as the emission of Cl,Br,Mo source.This experiment mainly studied the different morphology of BiOX(X=Cl?Br)of photocatalytic performance,we found that three dimensional spherical morphology than two-dimensional flake morphology structure had higher photocatalytic activity.The p-n heterojunction BiOX/Bi2MoO6 catalyst was prepared to improve the flake BiOX(X=Cl?Br)photocatalytic activity.In addition,this study also discussed that the different reaction time,reaction temperature and different amount of composite affected the morphology light catalytic properties.The samples were characterized by X-ray diffraction(XRD).ultraviolet-visible spectra(UV-Vis).scanning electron microscope(SEM?fluorescence(PL)?ultraviolet diffuse reflection spectrum(DRS)?N2 adsorption isotherm(BET)and so on.Through the experiment we can find that:firstly,under the condition of 180??6h,the preparation of spherical BiOX(X=Cl?Br)photocatalyst,after 30 min of visible light catalytic degradation of RhB,the degradation rate can reach 98%.Secondly,under the condition of 180?6 h,the flake BiOCl,BiOBr photocatalyst,after 3 h of visible light catalytic degradation of RhB dye,the degradation rate can reach 90%,95%.Thirdly,due to flake BiOX(X=Cl?Br)photocatalytic degradation effect is poor,so through constructing p-n heterojunction,preparation of BiOX(X=Cl?Br)/Bi2MoO6 composite photocatalyst,preparation of the composite photocatalyst,under the best possible conditions after 3 h photocatalytic experiment,its degradation efficiency can reach 99%,and the degradation rate obviously than pure flake BiOX(X=Cl?Br)quickly.