Sol-gel synthesis and XPS characterization of vanadium oxide bronzes

Abstract

The results of synthesis of the vanadium oxide bronzes NaV2O5, K4.3V6O16.2, and Rb4.4V6O16.1 are presented. The synthesis process can be described by three steps: the 1st-production of the sol by dissolving the necessary materials in H2O2 solution, the 2nd-fabrication of the gel by heating up to 350 K, and the 3rd-heating up to 580-780 K for the water removal from the gel. The chemical composition of obtained bronzes was examined by using X-ray photoelectron spectroscopy (XPS) method.