Preparation And Photoelectric Properties Of G-C₃N₄ And TiO₂/SrTiO₃ Composite Nano-films

With the increasingly serious global environmental problems,environmental pollution has attracted more and more attention,photocatalysis technology is expected to become one of the ideal ways to solve this problem.TiO₂ has many advantages in the field of photocatalysis,such as stable physical and chemical properties,low cost,friendly environment and rich preparation method.However,the electron-hole recombination rate of TiO₂ is high,and the large bandgap width restricts its absorption to visible light.Therefore,the electron-hole recombination rate of TiO₂ is reduced by preparing TiO₂/SrTiO₃ heterogeneous junction,and the absorption of visible light was expanded by preparing TiO₂/g-C₃N₄ heterogeneous junction.The photocatalytic performance of TiO₂ composite nano-material was improved obviously,and this provides a possibility for the degradation of organic pollutants in visible light.The research contents of this paper mainly include the following aspects:1.In this paper,the background of photocatalysis and the principle of photocatalysis are discussed,and the research progress of semiconductor photocatalyst is expounded,then the influence factors and modification methods of TiO₂ catalytic performance are emphatically studied.2.The effects of temperature and reaction time on the array of nanorods in the process of preparing Ti O₂ nanometer array by hydrothermal method were studied,and the morphology of TiO₂ arrays prepared by different reaction time was studied emphatically.This process helps us prepare for the preparation of TiO₂ composite nano-films.3.The Ti O₂/SrTi O₃ composite Nano-Film was prepared by solution method,and the morphology and structure of the composite structure were studied.The photocatalytic properties of the composites were evaluated by the degradation experiments of rhodamine B under visible light,the catalytic properties of the composite nano-films under visible light were investigated,and the factors influencing their photocatalytic activity were discussed.4.The TiO₂/g-C₃N₄ composite nano-film was prepared by solution method,and the morphology and structure of the composite structure were studied.The photocatalytic properties of the composites were evaluated by the degradation experiments of rhodamine B under visible light,and the influence factors of photocatalytic activity were discussed.