Research On Composite Silver Phosphate Photocatalyst Preparation And Its Performance On Photocatalyst Degradation Of Organic From Water

In this paper, on the basis of Ag₃PO₄ with the advantages of high catalytic oxidation ability and easy light corrosion defects. We aimed to improve the photocatalyst system by the Ag₃PO₄ graphene oxide ?GO? and Ag₃PO₄/MoS₂ composite photocatalyst. And the photocatalytic degradation performance were investigated with different substances such as Rhodamine B, methyl orange, methylene blue, chlorophenols and dichlorophenol.?1? Preparation of Ag₃PO₄, GO and Ag₃PO₄/GO. Graphene oxide was obtained firstly by oxidizing graphite powder and then by further ultrasonic processing. Finally under certain conditions through in-situ precipitation method, Ag₃PO₄/GO composites were obtained. In addition, Under 200?, MoS₂ was prepared with hydrothermal method, then Ag₃PO₄/MoS₂ composite photocatalyst was obtained.?2? In the photocatalitic system Ag₃PO₄/GO to degradation of Rhodamine B. After 20 min light reaction, with different contents of GO in the Ag₃PO₄/GO, rhodamine B's removal rate all reached 99%?CR.B=15 mg/L, Catalyst= 0.67 g/L?; When the GO content in the composite material Ag₃PO₄/GO was 0.3%, the degradation rate of rhodamine B in the photocatalytic system was rather quicker than only with Ag₃PO₄. In the photocatalitic system Ag₃PO₄/GO to degradation of methyl orange, Ag₃PO₄/GO had better adsorption ability to methyl orange than only with Ag₃PO₄ or GO. After 50 min light catalytic reaction, methyl orange's removal rate reached 91%?CMO=25 mg/L, Ccatalyst= 1 g/L?,which is much higher than Ag₃PO₄ on the photocatalytic removal efficiency of methyl orange?62%?.?3? In the photocatalitic system Ag₃PO₄/GO to degradation of chlorophenols. When the content of GO were 0.3%,1% and 2% respectively, the adsorption efficiency of Ag₃PO₄/GO to chlorophenols were 60%,67% and 80% respectively. Which was much higher than Ag₃PO₄ on the photocatalytic removal efficiency of chlorophenols ?60%?.?4? In the photocatalitic system Ag₃PO₄ and Ag₃PO₄/MoS₂ to degradation of Rhodamine B and methyl orange. Results showed that after 20 min light degradation rhodamine B's removal rate reached 99% and after 50 min light degradation with the catalytist of Ag₃PO₄/MoS₂, methyl orange's removal rate reached 85%.