Physical-chemical and photocatalytic properties of V-Mg oxide compositions synthesized by different methods
New approaches to vanadium-magnesium oxide catalysts synthesis have been proposed: using of mechanochemical (MChT), hydrothermal (HTT), and microwave (MWT) treatments; and V 2O 5 gel as initial reagent. XRD, DTA-TG, FTIR and UV-Vis spectroscopy, adsorption of nitrogen have been used for study of precursors and catalysts structure. Magnesium methavanadate MgV 2O 6·2H 2O with high specific surface area transformed into orthovanadate Mg3V2O8 – pyrovanadate Mg 2V 2O 7 mixture is formed as a result of MWT and HTT. The sample prepared from microwave precursor possesses the highest specific surface area, developed porous structure, and maximum photocatalytic activity under visible light on safranin T degradation in aqueous medium.