The Modification And Properties Study Of Semiconductor AgIn₅S₈ Photocatalysis Materials

With the rapid development of industry and the increasingly serious environmental problems,many new chemical and medical pollutants are discharged into the water,such as Nitrophenols and tetracyclines antibiotics.Because of their stable chemical properties,difficult biodegradation and solubility,these new pollutants will cause a series of ecological pollution problems and human health problems in the water environment.Therefore,we urgently need to find a feasible treatment method to remove organic pollutants in wastewater,in which photocatalytic degradation technology has come into people’s attention.In this paper,AgIn₅S₈/SnS₂ and AgIn₅S₈/ZnO composite photocatalytic materials weresynthesizedbymodifyingAgIn₅S₈semiconductormaterials.The physicochemical properties and photocatalytic activity of the prepared photocatalytic materials were characterized by XRD,XPS,SEM,TEM and fluorescence analysis.The main contents and conclusions of this paper are summarized as follows:（1）The results showed that the photocatalytic degradation efficiency of AgIn₅S₈/SnS₂ nanocomposite photocatalyst with molar ratio of 1:110 was 91.43%,and the photocatalytic effect was the best.The removal rate of COD from actual pharmaceutical wastewater was 65.5%.In toxicity experiments,tetracycline inhibited the growth of microorganisms,and tetracycline degraded by photocatalyst successfully made microorganisms grow normally.（2）AgIn₅S₈/ZnO composite photocatalyst was prepared with anhydrous zinc acetate,silver nitrate,TAA and indium nitrate as experimental materials.The photocatalytic properties,visible light transient response,structure and mechanism of AgIn₅S₈/ZnO nanocomposite photocatalyst were analyzed and discussed by means of XPS,XRD,TEM and photocurrent measurements.The results showed that the photocatalytic efficiency of AgIn₅S₈/ZnO composite photocatalyst with molar ratio of1:90 for 2-NP degradation reached 81%,and its electron-hole separation ability was the best and its light response ability was the best.In addition,the photocatalytic materials showed excellent stability after four cycles of experiments.