Preparation And Properties Of AgI Based Semiconductor Heterojunction Photocatalyst

This paper focuses on the study of semiconductor heterojunction photocatalysts.We use the tools of technology,such as XRD,EDS,XPS,DRS,TEM,BET and other scientific and technological instruments to characterize our product features and analyze the performance of our products through simple and easy operation and low carbon environmental protection.Based on the analysis of these experimental results and scientific theory,we propose the most likely reaction mechanism.BiOIO3 nanosheets were successfully synthesized by solvothermal method at different temperatures.The results show that the change of temperature is almost no significant difference in the morphology and particle size of BiOIO3.In particular,the crystallinity and samples has a certain effect on the photocatalytic activity,and the obtained BiOIO3(130?)shows the highest photocatalytic activity,and almost all of the RhB decomposes in 80 minutes.The present study shows that BiOIO3 is a promising photocatalyst for the degradation of organic pollutants and environmental remediation.A novel AgI/BiOIO3 nanocomposite material synthesized by dissolution-precipitation method.The photocatalytic activity of photocatalytic activity was investigated by photocatalytic degradation of rhodamine B under visible light.The experimental results show that the obtained AgI/BiOIO3 heterojunction samples show a greatly improved photocatalytic activity.At the same time,under the visible light the as-prepared samples can still maintain good stability.30%AgI/BiOIO3 heterojunction catalyst is optimal mole rate,and the RhB in the solution can be almost completely degraded in 10 minutes,showing the highest photocatalytic activity.The Ag2O/AgIheterojunction composites with different molar ratios were successfully synthesized at room temperature by a simple two-step precipitation method.The results show that Ag0 NPs can be formed on the surface of Ag2O/AgI heterojunction composites can be confirmed by XPS analysis after visible light irradiation.Thus,under the action of Ag0 NPs(which facilitates interfacial charge transfer)greatly enhances the photocatalytic activity.The optimum molar ratio of Ag2O/AgIcomposites was 1:1,and RhB was catalytically degraded after 25 minutes.The present work provides a highly efficient Ag2O/AgI heterojunction photocatalyst with Ag0 NPs plasma resonance,which is a promising photocatalyst for the treatment of organic pollutants,energy saving and emission reduction.AgI/WO3 composites were synthesized by a simple two-step hydrothermal-precipitation method.Under the visible light irradiation,AgI/WO3 composites exhibit excellent photocatalytic activity for photocatalytic degradation of RhB,which is much better than pure WO3 or AgI catalyst and has good stability.In addition,the optimum molar ratio of AgI/WO3 composites is 1:1,and the photodegradation of AgI/WO3 composites may be as high as 98%after 21 minutes of visible light irradiation.The structure of the heterojunction photocatalyst on the basis of WO3 greatly improved the original photocatalytic performance,is a huge breakthrough.