Bifunctional organic cobalt phosphonates nanoplates with efficient photocatalytic peroxymonosulfate activation and electrocatalytic water oxidation

Abstract

The exploration of efficient and inexpensive transition metal phosphonates-based materials with multifunctional applications has increasingly urgent and meaningful. Herein, the organic cobalt phosphonates nanoplates (CoPPA) catalyst was achieved via a solvothermal process without employing any additives. The CoPPA catalyst proceeds nanoplates architecture with minimal sheet thickness, which not only reduce the transfer distance for charge carriers to the surface of catalyst and realize the separation of the charge carriers, but also provide numerous active sites for surface reaction. As a result, the optimal CoPPA catalyst not merely accelerated the photocatalytic activation of peroxymonosulfate (PMS) for tetracycline hydrochloride removal in CoPPA/PMS/Vis system, but also effectively electric-catalyze the oxygen evolution reaction. This work provides fresh insights for exploring high-efficiency dual-functional transition metal phosphonates-based materials and is expected to contribute to purify recalcitrant contaminants and energy conversion.