Structural Study of WO₃ and MoO₃ Compound Films in H₂ Gasochromism

Abstract

Sol-gel tequnique was used to prepare disordered tungsten oxide and molybdenum oxide sols. A series ratio of W:Mo compound sols were obtained via mettalic powder co-peroxided by H2O2 as precursors in ethonal. Compound films were achieved by dip-coating method. Fourier Transform Infrared Spectroscopy, Raman Spectroscopy were taken to characterize the structure of these compound films. Uv-visible Spectroscopy was used to test the gasochromic property. The results showed that the gasochromics property was much different from that of pure tungsten oxide and molybdenum oxide sol-gel thin films. The effect was origined from the structrue alteration, which was not due to the spectrum superposition but the co-reaction of W and Mo.

Blue colloidal nanoparticles of molybdenum oxide by simple anodizing method: decolorization by PdCl2 and observation of in-liquid gasochromic coloration

“…However, molybdenum oxide is one another material with great ability of gasochromic coloration and has been known as a good photochromic material. Few reports on gasochromic coloration of molybdenum oxide thin films exist in literature [19][20][21] and most of which has not shown coloring reversibility. Additionally, to the best of our knowledge, no report on in-liquid gasochromic coloration of a colloidal molybdenum oxide has emerged up to now.…”