Preparation Of Carbon Material/In₂S₃/UiO-66 Composites And Their Photocatalytic P Roperties Study

With the continuous development of industry,the water pollution caused by organic dyes from industrial emissions has seriously threatened the survival of human beings.In recent years,semiconductor photocatalysis has received wide attention due to its advantages of energy saving,environmental protection,non-toxicity and no-secondary pollutants,hence,it is considered as one of the most advantageous means to solve this problem.Therefore,in this paper,a series of MOF-based composite materials were designed which aiming at obtaining a new visible light-driven photocatalyst with high efficiency、good photocatalytic performance as well as practical application.The specific research contents and results are as follows:（1）The In₂S₃/UiO-66 composites are prepared by the growth of In₂S₃ nanoparticles on the surface of UiO-66 via a facile hydrothermal method as UiO-66 is acted as a matrix.The experiments show that the In₂S₃/UiO-66 composites exhibits an enhanced photocatalytic ability than pure In₂S₃ and UiO-66,and when the weight ratio of In₂S₃:UiO-66 is 40%,the In₂S₃/UiO-66 composite demonstrate the best photocatalytic performance,the photocatalytis ability of ISU-40%are 9.5 and 65 times than In₂S₃ and UiO-66,respectively.In addition,the In₂S₃/UiO-66 composite also show an excellent photocatalytic stability as the degradation rate is only a 5%loss after five cycles.Furthermore,the reasonable explanations for the enhanced photocatalytic performance were discussed,and the photocatalytic mechanism for the degradation of MO by In₂S₃/UiO-66 was also proposed.（2）The rGO/In₂S₃/UiO-66 ternary composite was obtained via a facile hydrothermal method,in this process,GO was reduced to rGO as well as coupled with In₂S₃/UiO-66.The results show that the rGO/In₂S₃/UiO-66 is superior than In₂S₃/UiO-66 for photocatalytic performance,and rGO/In₂S₃/UiO-66 also demonstrate a outstanding photocatalytic stability as there is 5.8%loss of degradation rate after five cycles.In addition,the reasonable explanations for the enhanced photocatalytic performance and photocatalytic mechanism for the degradation of MO by rGO/In₂S₃/UiO-66 were proposed.（3）The CQDs/In₂S₃/UiO-66 ternary composite was obtained through two steps.Step one,CQDs/UiO-66 was prepared via solvothermal method,step two,the CQDs/In₂S₃/UiO-66was obtained via the growth of In₂S₃ nanoparticles on the surface of CQDs/UiO-66 via a facile hydrothermal method.Compared to In₂S₃/UiO-66,CQDs/In₂S₃/UiO-66 demonstrates an enhanced photocatalytic activity,and the degradation rate is 5.8%loss after five cycles.In addition,the reasonable explanations for the enhanced photocatalytic performance and photocatalytic mechanism for the degradation of MO by CQDs/In₂S₃/UiO-66 were proposed.