Synthesis of Pb₉(PO₄)₆/Ag₃PO₄ Composite Photocatalysts with Enhanced Visible Light Photocatalytic Activity

Abstract

Pb (PO ) /Ag PO photocatalysts with different amounts of Pb (PO ) were successfully synthesised by the ion exchange method. The catalysts were characterized by X-ray diffractometry (XRD), High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Brunauer- Emmett-Teller (BET), Fourier transform infrared spectrometry (FT-IS), and ultraviolet-visible (UV-vis) spectroscopy. All Pb (PO ) /Ag PO photocatalysts show much higher photocatalytic activities than pure Ag PO under visible light irradiation in the methyl-orange (MO) decomposition. Especially, the 3.0 wt% Pb (PO ) /Ag PO photocatalyst shows the highest photoactivity and also high stability after five cycles. The MO degradation rate during each cycle is almost maintained at 97%. Photo-electrochemical measurement of photocatalysts verified that the enhancing photocatalytic activity was resulted from the electron-hole pair high separation. The photocatalytic activity enhancement of Pb (PO ) /Ag PO is closely related to ·OH, the main active oxygen species.

New Magnetically Recyclable Reduced Graphene Oxide rGO/MFe2O4 (M= Ca, Mg)/Ag3PO4 Nanocomposites With Remarkably Enhanced Visible‐light Photocatalytic Activity and Stability

“…In the ubiquitous scientific world, the development of environmentally‐friendly catalysts is one of the more considerable issues. Semiconductor photocatalysis as a green technology to remove hazardous organic contaminates in water has attracted extensive attention, as it can use sunlight irradiation as the energy source .…”