Physical-Chemical and Photocatalytic Properties of V-Mg Oxide Compositions Synthesized by Different Methods
Abstract
New approaches to vanadium-magnesium oxide catalysts synthesis have been proposed: using of mechanochemical (MChT), hydrothermal (HTT), and microwave (MWT) treatments; and V2O5 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 MgV2O6·2H2O with high specific surface area transformed into orthovanadate Mg3V2O8 – pyrovanadate Mg2V2O7 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.
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