The Construction Of Bismuth Vanadate Heterojunction And Its Photocatalytic Performance

The use of light energy to eliminate harmful dyes is a feasible measures to the greening environment.BiVO₄ has attracted the attention of R&D personnel with its unique electronic layer structure.In the process of light energy decontamination,the influence of eliminating the dye rate mainly includes the utilization of light energy,charge migration,and the effective use of charge in the actual application reaction.The outer shape and composite structure of the semiconductor material can satisfy the above criteria for improving the efficiency of eliminating harmful impurities.Carry out the following experimental contents for the above problems:1)The BiVO₄/Bi₄V₂O₁₀0 nanoparticles were prepared at room temperature.Then,the solvothermal reaction was used to rapidly form BiVO₄/Bi₄V₂O₁₀0 nanosheets.Then,under the action of polyol,the nanosheets spontaneously assembled into porous heterophase nanospheres,and the reaction time was the change affects the composition of the crystalline phase,resulting in a single BiVO₄ material.2)The meshed BiVO₄ was synthesized by impregnating the sorghum core with a solution and calcining.Then,it was reacted with different amounts of WCl₆ to construct WO₃/BiVO₄/BiOCl ternary heterostructures of different capacities of BiOCl/WO₃ in one-step solvothermal,and the ability to decompose harmful substances was examined.It was found that when the amount of WCl₆ used reached 12.5 wt%,the prepared WO₃/BiVO₄/BiOCl had the best performance in degrading harmful substances.3)Based on the porous mesh BiVO₄ prepared in advance in 2),the composite of BiVO₄/Bi₂S₃ and BiVO₄/Bi₂S₃/BiOCl was synthesized by a simple one-step solvothermal reaction using Cl and S elements of L-cysteine hydrochloride.material.Under simulated sunlight,the ternary BiVO₄/Bi₂S₃/BiOCl has better degradation ability to phenol and RhB than BiVO₄ and BiVO₄/Bi₂S₃.