Ag3PO4: Visible Light Photocatalytic Performance and Mechanism

作者：Wang Yun Fang; Fan Cai Mei^*

来源：Chinese Journal of Inorganic Chemistry, 2012, 28(2): 347-351.

• silver phosphate
• precipitation replacement method
• visible light
• photocatalysis

Visible light photocatalytic material Ag3PO4 was prepared by precipitation replacement method and characterized by using XRD, UV-Vis and XPS. The photocatalytic activity was evaluated by means of degradation of micro-organic pollutants in water. The photocatalytic mechanism was discussed based on the active species ;during photocatlytic process and band structure. The results showed that the band gap was about 1.9 eV, Ag+ on the catalyst surface might capture photoelectron e(-) and the lower valence band potential of Ag3PO4. All of these would help for Ag3PO4 to separate e(-)-h(+) pairs generated under visible light irradiation and the formation of reactive species center dot OH. After 60 min visible light irradiation, the degradation rate of methyl orange and humic acid with initial concentration of 15 mg.L-1 reached 97% and 82%, respectively, by using 0.6 g.L-1 Ag3PO4. This result is better than that of TiO2-P-25 40% and 25% at the same experimental conditions.

• 出版日期2012-2-10
• 单位太原理工大学