Synthesis of AgCl/Ag3PO4 Composite Photocatalysts and Study on Photodegradation Activity Based on a Continuous Reactor

Abstract

Novel AgCl/Ag₃PO₄ photocatalysts were synthesized by a simple precipitation method, in which AgCl was coated onto Ag₃PO₄ 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/Ag₃PO₄ after 8 min of visible light irradiation, while pure Ag₃PO₄ degraded only 71% methyl orange under same conditions. The degradation rate constant of the 2 wt.% AgCl/Ag₃PO₄ was 1.36 times higher than that of pure Ag₃PO₄. The AgCl/Ag₃PO₄ maintained high photocatalytic activity after five cycles, without any significant decrease.

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