Synthesis And Photaocatalytic Perperites Of Ag/AgCl Surface Plasmonic Photocatalysts

In recent years, energy shortage and environmental pollution have become the focus of attent ion and the two major challenges that the sustainable development faces. Photocatalyt ic technology is a new technology that could be capable of efficient ly splitting water using solar energy to produce hydrogen energy, while the pollutants can be removed by degradation, and it has the advantages of high removal efficiency, chemical stabilit y and low cost, so it has wide applicat ion prospects in degrading and clean energy and other fields. Because of their special electronic structure and good optical performance, BiPO4 and BiOIO3 caused wide concern. But the wide band gap of BiPO4 and BiOIO3 limited their practical applicat ion, so the modificat ion of BiPO 4 and BiOIO3 is very meaningful.In this paper, the modificat ions of BiPO4 and BiOIO3 were carried out by loading Ag/Ag Cl nanopart icles, and two kinds of surface plasmon photocatalysts Ag/Ag Cl/BiPO4 and Ag/Ag Cl/Bi OIO3 were synthesized. The prepared materials were characterized by XRD, SEM, TEM, HRTEM, UV-vis DRS, N2 adsorption-desorption and PL respectively, using rhodamine B as the target pollutant and analyzing the crystalline structure and morphology of the samples and the possible mechanism of the photocatalysis reaction system. Details are as follows:The first chapter introduced the mechanism and application of photocatalyt ic technology, and analyzed the exist ing problems in research and the modificatio n methods of photocatalyst; And then we introduced the characterist ics, synthet ic method and modified method of BiPO4 and BiOIO3 materials; At the same time, we also gave a brief descriptionon about the current research situation of Ag X materials; Finally, the significance and the content of the paper were put forward.The second chapter described the required reagents, instruments and methods of catalyst characterization; Then the testing standard and evaluat ion method of the photocatalyst were described.The third chapter introduced the synthesis of Ag/Ag Cl/BiPO4 composite photocatalyst, and evaluated its photocatalyt ic properties. First, BiPO4 substrate were synthesized by using a hydrothermal method, then the Ag/Ag Cl nanoparticles loaded onto BiPO4 substrate by using a precipitation-deposition photoreduction method,, and analyzed the characterizat ion results of the materials. Then the photocatalyt ic properties of the samples were evaluated by degradat ion of Rhodamine B. Compared with the pure BiPO4 and Ag/Ag Cl, photocatalyt ic performance of Ag/Ag Cl/BiPO 4 improved significant ly under visble light. Finally, on the basis of band structure analysis and the active species trapping experimental results, a photocatalyt ic mechanism is proposed.The fourth chapter introduced the composite photocatalyst Ag/Ag Cl/Bi OIO3 was synthesized by loading Ag/Ag Cl nanoparticles on the surface of BiOIO 3. The composit ion, morphology structure of the samples was analyzed by characterizat ion. Then the photocatalyt ic propert ies of the photocatalysts were evaluated by degradation of Rhodamine B. Studies have shown that the photocatalyt ic properties Ag/Ag Cl/Bi OIO3 photocatalysts have been significantly improved under visible light. Finally, the photocatalyt ic mechanism was proposed according to the band analysis and the act ive species trapping experimental results.Finally, this paper summarized the work, and future research was discussed.