New gasochromic system: nanoparticles in liquid
Source abstract
Abstract
In this study, WO3 nanocrystallites were first produced by laser ablation of W target in deionised water. To synthesize palladium, a PdCl2 solution (0.2 g/L) was added to the liquid. Transmission electron microscope revealed successful synthesis of tungsten oxide nanocrystallites along with the production of Pd and core–shell Pd/WO3 nanoparticles. Gasochromic behavior was examined by hydrogen bubbling into Pd/WO3 liquid in which a transition to blue absorbing state was observed. Optical absorption spectra of the colored liquid represented different sharp small polaron absorbing peaks below 3 eV and the peaks intensity was observed to be varied with Pd:WO3 ratio. Time variations of optical density difference (∆OD) were measured at constant wavelength of 632.8 nm by alternative bubbling hydrogen or oxygen gases. The ∆OD in the first coloring cycles were not completely reversible owing to the presence of some unreacted PdCl2. The further coloring bleaching indicates a normal gasochromic behavior.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Laser-Ablation Synthesis of Nanoparticles · Pigment Synthesis and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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