Preparation And Properties Of Multivariate Photocatalytic Materials

Solar energy,as a kind of renewable resources,regarded as ideal“fuel”because it could transport energy to the earth continuously.Just like the photosynthesis of plants,photocatalysts gradually catch people,s attention due to the use of sunlight.The principles of photocatalytic technologies are making the photocatalyst own the redox reduction ability and decomposite the contaminants and the purpose of producing corresponding redox products under the illumination of visible light.From the view of microscopic level,as a kind of the standard photocatalyst,the optical electron and hole composite rate generated by photomigrants in the reaction should be at a low level under the reaction.And photocatalyst itself should have a wide range of spectral response.We have conducted a from this point.This paper mainly explores the preparation of multi-composite photocatalytic materials and its ability to degrade pollutant methyl orange solution（MO）and catalytic decomposition water to produce hydrogen.Through the characterization and analysis of the prepared multivariate complex,try to find the mechanism between the photocatalyst,and actively provide a valuable reference for subsequent research.This paper mainly attempts to study two different composite optical catalysts:1)The WO₃ nanomaterials and Ag:ZnIn₂S₄ nanosheets are successfully achieved by common hydrothermal.Through a series of characterizations for WO₃/Ag:ZnIn₂S₄, compared with WO₃ with pure light response,the rate(K_app=0.1783 min^-1)of degradating methyl orange solution（MO）and the ability(109.22μmol h^-1 g^-1)of decompositing water to produce hydrogen of WO₃/Ag:ZnIn₂S₄ have improved greatly. Among them,Ag⁺is doped and WO₃ and Ag:ZnIn₂S₄ better synergistic effects（forming heterojunction）play a key role.2)Through the hydrothermal method,we also successfully synthesized the composite photocatalyst CdS/RGO/MoS₂ of the three-dimensional structure.Through a variety of characterization methods,we also found that the ability of CdS/RGO/MoS₂ light dropmele orange solution（MO）was significantly enhanced.Under visible light,the CdS/RGO/MoS₂ composite material has significant photocatalytic degradation activity and stability to methyl orange solution（MO）.Its light reduction rate(0.05777 min^-1)is 2.5 times and 18.6 times that of CdS(0.023 min^-1)and MoS₂(0.003 min^-1),respectively.We believe that the increase in activity of CdS/RGO/MoS₂ multi-composite photocatalyst is mainly due to the formation of heterogeneous structures between composites,and enhances the separation of the photovoltaic carrier,thereby effectively improving the charge transfer of the interface.This study provides a certain reference for rationally designing multi-optical catalysts,it has a certain inspiration meaning for its reasonable construction of heterogeneous junctions.