Interaction of Graphene Oxide with Tungsten Polyoxometallates in the Process of Producing Composite

Composites based on graphene oxide and polyoxometalates have found wide application in catalysis, energy production, ecology, and medicine. The interaction of graphene oxide and polyoxometalates with the lacunar anion of the Keggin structure Rb6[SiW11O39Zn(HMTA)]·12H2O and Cs6[SiW11O39Zn(HMTA)]·10H2O during ultrasonic treatment of their equimass mixtures was studied using electron and IR spectroscopy, Raman spectroscopy, scanning electron microscopy, and X-ray phase analysis. It was established that the composites are formed due to the electrostatic interaction between the polyoxometalates and graphene oxide, as well as the formation of bonds involving the functional groups of the latter, containing an acidic residue, and the polyoxometalate anion of hexamethylenetetramine. The obtained information can be useful in creating composite materials based on graphene oxide and polyoxometalates with specified functional properties.