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Synthesis of AgCl/Ag3 PO4 Composite Photocatalysts and Study on Photodegradation Activity Based on a Continuous
Xiaofei Zhao1, Limin Song1, Shujuan Zhang2
1College of Environment and Chemical Engineering & State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin, China.
Abstract:
Novel AgCl/Ag3 PO4 photocatalysts were synthesized by a simple precipitation method, in which AgCl was coated onto Ag3 PO4 particles, as uncovered by X-ray diffractometry, transmission electron microscopy and ultraviolet-visible spectrometry. Different from previous research on photocatalytic degradation, we studied the performance of methyl orange photodegradation on a small continuous flow reactor. The highest degradation activity of 97% was achieved by the 2 wt.% AgCl/Ag3 PO4 after 8 min of visible light irradiation, while pure Ag3 PO4 degraded only 71% methyl orange under same conditions. The degradation rate constant of the 2 wt.% AgCl/Ag3 PO4 was 1.36 times higher than that of pure Ag3 PO4 . The AgCl/Ag3 PO4 maintained high photocatalytic activity after five cycles, without any significant decrease.
