Existing form of Mo(VI) in acidic sulfate solution

Abstract

The existing form of molybdenum in acidic sulfate solution was studied by means of ion exchange, infrared (IR) spectra and X-ray photoelectron spectroscopy (XPS). The results indicate that the anionic molybdenum species are predominant in acidic sulfate solution, and Mo(VI) can combine with sulfate radical to form heteropoly acid anions [Mo 2 O 5 (SO 4 ) 2 ] 2-and [MoO 2 (HSO 4 ) 4 ] 2-. With the decrease in solution pH from 1.92 to 0.06, the existing form of Mo(VI) changes from Mo 7 O 21 (OH) 3 3-to [Mo 2 O 5 (SO 4 ) 2 ] 2-and then becomes [MoO 2 (HSO 4 ) 4 ] 2-, which results in the decrease in the resin adsorption capacity for molybdenum.

Spectroscopic Study of the Behavior of Mo(VI) and W(VI) Polyanions in SulfuricPhosphoric Acid Mixtures

“…5b) are attributed to the cluster with MoO 2 core and only a few minor peaks are assigned to Mo 2 O 5 clusters (Table S5). In agreement with the UV-Vis data on the existence of ~70% anions are also confirmed by the infrared (IR) and X-ray photoelectron spectroscopy (XPS) for the H 2 SO 4 solution (pH < 0.5) with ~0.05 mol•L -1 Mo(VI) [36].…”

Mechanism insight into the photocatalytic degradation of fluoroquinolone antibiotics by the ZIF-8@Bi2MoO6 heterojunction

“…In the ammonium buffer solution (reaction (1), pH = 9), Mo( vi ) exists in the form of MoO 4 2− . 44,45 The reaction between Bi 2 (EG) 3 and MoO 4 2− anion forms Bi 2 MoO 6 (reaction (3)). 46 The formation of Bi 2 MoO 6 crystals is affected by several factors such as solvent, pH, temperature, and reaction time.…”