| Photocatalysis has draw people’s attention as its powerful oxidation, thorough degradation, simple device and proficiency utilization of sunlight. Nano-photocatalytic material is more efficient than other materials, but is difficult to recycle from water.Firstly, a stable plasmonic photocatalyst Ag@AgCl was successfully fabricated by classical liquid phase precipitation-light-induced redution method with Glycol as solvent and polyvinylpyrrolidone as structure directing agent and stabilizer. The composite was characterized by TEM, SEM, XRD. And its photocatalytic property and principle was studied towards target pollutant methyl orange. The result showed that Ag@AgCl was able to decolor and further degrade organic component within15min under UV-visible light. The stability of the plasmonic photocatalysts was also investigated in detail.Secondly, Fe3O4/RGO composite was prepared by in stu hydrothermal method with the reduced graphene or graphene oxide. Its crystal structure and morphology was analysed by TEM, SEM, XRD. The results showed that nano-Fe3O4had the best dispersibilty in Fe3O4/RGO composite prepared by in stu hydrothermal with graphene oxide which has simple experiment process and with more functional group.Finally, AgCl was loaded on Fe3O4/RGO composite by deposition-precipitation method which will generate plasmonic photocatalyst (Ag@AgCl)-Fe3O4/RGO composite when exposed under UV-visible light. The composite has both powerful photocatalysis as Ag@AgCl and rapid separative capability. The composite was analysed by TEM, SEM, XRD. The formation mechanism and the photocatalytic capability were discussed. The results indicated that Fe3O4and Ag@AgCl can effectively loaded on the graphene. Grapheme can inhibit the growth of AgCl particles and promote the separation of electron-hollow pairs as its effective charge transfer and high light transmittance contributing to the improvement of photocatalytic activity. |
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