Study On The Preparation And Performance Of ZnIn₂S₄Composite Photocatalyst

TiO2as a new kind of semiconductor photocatalysts in the twentieth century, with a strong stability and high photosensitivity, and many other advantages, is people’s lives, widely used in the production of a semiconductor photocatalyst. TiO2particles easily reunion, weak and organic adsorption capacity and low utilization of solar photocatalytic efficiency is limited by a serious impact on their actual production. Therefore, some scholars will study the focus from the traditional improve TiO2performance transferred to the preparation of the catalyst has a better effect in the visible range. These visible catalyst ZnIn2S4as an important ternary chalcogenide compound semiconductor catalyst, because of its unique optical and electrical properties and catalytic properties, causing extensive attention of scholars. Research scholars prepared the ZnIn2S4particles of nanometer or micrometer level, and used in the reaction of photocatalytic water preparation of hydrogen and photocatalytic degradation of dyes has made some achievements.Zn(NO3)2-6H2O,In(NO3)2-4.5H2O and TAA as the raw material, the use of low-temperature hydrothermal synthesis method, were successfully prepared ZnIn2S4sample, and the use of scanning electron microscope (SEM), X-ray diffraction (XRD) and UV-visible diffuse reflectance spectroscopy (DRUV-Vis) and other technical means of the samples were characterized and analyzed. And prepared ZnIn2S4as a catalyst under visible light irradiation conditions, studying degradation efficiency of methyl orange dye. And system ZnIn2S4photocatalyst preparation and photocatalytic properties influencing factors, and on this basis, focuses on how to improve ZnIn2S4photocatalytic efficiency. The main findings are as follows:1.Only deionized water as a solvent in the hydrothermal synthesis method in the temperature range of35℃-70℃, were successfully prepared ZnIn2S4visible catalyst did not add any template and surfactant case, the existing publicliterature, the use of hydrothermal synthesis method, the minimum temperature is80℃.2.The photocatalytic explain methyl orange experiment, ZnIn2S4samples within two hours to reach97%of the degradation rate of3hours to complete degradation of the currently known maximum efficiency, showing a high level of photocatalytic efficiency.(The highest photocatalytic efficiency in the published literature for the degradation of70%in3hours)3.Explores the main factors affect ZnIn2S4photocatalytic efficiency, and summed up the photocatalytic degradation of methyl orange the most efficient conditions...