Abstract
Stable molybdenum blue nanoparticles dispersions were synthesized using ammonium heptamolybdate and ascorbic acid. The effect of molar ratios of reducing agent/Mo and acid/Mo on the speed of formation and stability of the disperse system has been demonstrated. The particles were characterized by UV/vis, infrared (FTIR), nuclear magnetic resonance (NMR) spectroscopy, and dynamic light scattering (DLS) methods. The X-ray photoelectron spectroscopy (XPS) method confirmed the presence of reduced MoV in the structure of molybdenum oxide nanoclusters, the proportion of which was 30%.
Highlights
The particles were characterized by UV/vis, infrared (FTIR), nuclear magnetic resonance (NMR) spectroscopy, and dynamic light scattering (DLS) methods
The X-ray photoelectron spectroscopy (XPS) method confirmed the presence of reduced MoV in the structure of molybdenum oxide nanoclusters, the proportion of which was 30%
Molybdenum blue is a compound containing giant molybdenum oxide clusters that belong to the class of polyoxometalates (POMs) [1]
Summary
Molybdenum blue is a compound containing giant molybdenum oxide clusters that belong to the class of polyoxometalates (POMs) [1]. These clusters contain molybdenum atoms with oxidation states between +5 and +6. The unique structure of molybdenum blue particles determines their application in various fields. The molybdenum blue is traditionally used in the field of analytical chemistry for qualitative analysis of a series of elements through the formation of a characteristic blue color. This application is advancing in developing special sensors for the qualitative analysis [4,5]. The unique size of nanostructured molybdenum blue particle enables their application in homogeneous and heterogeneous catalytic systems [6,7,8,9,10]
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