Synthesis And Photocatalytic Performance Of Semiconductor Photocatalysts Containing Indium(Ⅲ)

Under the current social development,human beings have built a close connection with energy and environment.Exploring the use of sustainable energy and repairing the polluted environment have become the focus of human attention.Photocatalysis is a technology aimed at transforming and storing solar energy.The development of emerging technologies requires continuous innovation,and photocatalytic materials play an important role in the development of photocatalytic technology.Choosing the semiconductor photocatalyst containing indium（Ⅲ）as the research object,the photocatalyst was modified by metal deposition and semiconductor composite method to improve its photocatalytic performance.The main results of this paper are as follows:Bi³⁺was reduced by ethylene glycol to form metal Bi nanoparticles,and metal Bi nanoparticles were uniformly deposited on InVO₄ nanosheets by solvothermal method.The two-dimensional structure of InVO₄ nanosheets and the synergistic effect of plasma effect of metal Bi nanoparticles on the surface of semiconductors to enhance the performance of InVO₄photocatalytic nitrogen fixation and ammonia synthesis.The results show that the photocatalytic nitrogen fixation efficiency of 5%Bi/InVO₄ is as high as 626μmol g^-1 h^-1,which is 5.2 times higher than that of InVO₄ nanosheets.TiO₂-B/In₂S₃ composites were successfully prepared via hydrothermal methods with TiO₂-B nanowires and flake In₂S₃ as raw material.The one-dimensional structure of TiO₂-B nanowires is beneficial to the migration of photogenerated electrons along the axial direction,and the visible light absorption property of TiO₂-B/In₂S₃ is improved with the help of the response ability of In₂S₃ to visible light.The results showed that the catalytic degradation of cationic dye rhodamine B（RhB）is about 99.5%over 1:3 TiO₂-B/In₂S₃ composite under visible light irradiation for 90 minutes.ZnIn₂S₄（IPA）and ZnIn₂S₄（EtOH）were prepared by hydrothermal method by changing the reaction solvent.ZnIn₂S₄（IPA）showed the better catalytic activity.Carbon quantum dots（CQDs）/ZnIn₂S₄（IPA）composites were synthesized by the hydrothermal reaction with ZnIn₂S₄（IPA）and CQDs.CQDs/ZnIn₂S₄（IPA）composite shows the improved photocatalytic ability because of the good visible light response of ZnIn₂S₄ and CQDs.The results show that the degradation rate of methyl orange（MO）can reach 96.2%over 2.0 CQDs/ZnIn₂S₄（IPA）under visible light illumination for 120 min.In summary,the synthesis and modification of semiconductor photocatalysts containing trivalent indium were studied systematically in this paper.The results show that the trivalent indium semiconductor photocatalyst and its modified photocatalyst show better performance and greater research potential in photocatalytic nitrogen fixation and dye degradation.