Ag₂VO₂PO₄ Nanorods: Synthesis, Characterization, Photoactivity and Antibacterial activity

Abstract

Silver-containing materials have been the source of attraction due to their excellent optical and photocatalytic properties. Silver vanadium phosphate, Ag 2 VO 2 PO 4 , (hereafter abbreviated as AVP) in nanorods form was synthesized by hydrothermal method at 220 °C for 24 h and characterized by PXRD, FT-IR, 31 P MAS NMR, SEM-EDS, TEM-SAED, N 2 adsorption-desorption, UV-Vis DRS and XPS techniques. It was crystallized in the monoclinic crystal lattice with space group C2/m and the crystal structure consists of layers of edge-sharing VO 6 octahedra and PO 4 tetrahedra. The Ag 2 VO 2 PO 4 nanorods have shown the photocatalytic property against the degradation of Rhodamine B (RhB) dye. The degradation of RhB by AVP after 180 min of visible light irradiation was 45 %. The photocatalytic activity of this material was explained by its visible light absorption, which makes it a promising photocatalyst for use in solar photocatalysis and with a good photocatalytic rate. A mechanism for photodegradation of RhB dye was proposed based on scavenger experiments. It was noticed that * OH radicals are actively participating in the degradation of RhB followed by holes while the role of O 2 *À radicals is negligible. Antibacterial activity of this material was studied over gram-positive Staphylococcus aureus and gram-negative Pseudomonas aeruginosa bacteria.

Sustainable ammonia synthesis through electrochemical dinitrogen activation using an Ag2VO2PO4 catalyst

“…AgNO 3 , NH 4 VO 3 and H 3 PO 4 , which were dissolved in deionized water and transferred to an autoclave and heated for 24 hours at a fixed temperature of 220 °C. 37 The light-brown colored precipitates were collected after reaction completion and then washed and dried following the above procedure.…”

New types of open-framework vanadium borophosphates with photocatalytic properties

“…14 To overcome this drawback, the prominent method is the doping or integration of other heteroatoms into vanadium oxides, decreasing the recombination rate and improving the photocatalytic performance. 14–16 Consequently, some multicomponent vanadium oxides with enhanced photocatalytic performance in the organic degradations under visible light have been achieved, as exemplified by Ni or Co-doped V 2 O 5 , 14,15 Ag 2 VO 2 PO 4 nanorod, 17 Ag/Na 3 VO 2 B 6 O 11 composite, 18 silver-modified lithium vanadium phosphate, 19 and Na 3 V 2 O 2 (PO 4 ) 2 F photo-catalysts 20 whose heteroatom B or P is incorporated to achieve a new class of multiple polyoxovanadates as potential visible-light-driven photo-catalysts. However, multiple vanadium borophosphates applied for the efficient visible-light-driven photo-catalysts towards the degradation of harmful organic contaminations have not emerged to date.…”