Tungsten trioxide (WO3)-derived nanostructures have emerged recently as feasible semiconductors for photocatalytic purposes due to their visible-light harvesting that overcomes the drawbacks presented by TiO2-derived nanoparticles (NPs). However, applications are still limited lack of fundamental knowledge at nanoscale poor understanding physical processes affect photoactivity. To fill this gap...

Recycling waste materials as catalysts in the oxygen evolution reaction (OER) offers an innovative approach to reducing catalyst costs. Scrap tungsten carbide–cobalt (WC–Co) die, used wire drawing processes industrial applications, may be recovered trioxide (WO3) by electrolysis method. In this study, all composite were prepared their weight percentage IW-x (0 ≤ x 100). Here, I, W, and represen...

Tungsten trioxide (WO3) is used to prepare the important electrochromic layer of device as a wide bandgap semiconductor material. In this study, WO3 film was successfully prepared by screen printing. To modify thixotropy and wettability ink, polyvinyl alcohol (PVA) 2-perfluoroalkyl ethanol (FSO) were added in ammonium meta-tungstate (AMT) solution. We found that PVA additive could improve dynam...

Air quality monitoring and analysis have become a major issue in recent years. Metal oxide (MOX) gas sensors are very sensitive, due to high variability of their resistivity presence gas. However, they not selective, i.e. it is possible determine the nature concentration using only variations resistance sensor. Noise spectroscopy one solutions improve selectivity. In this paper, we evaluate noi...

Structural design and morphological control of semiconductors is considered to be one the most effective ways improve their photocatalytic degradation properties. In present work, a hexagonal WO3·0.33H2O hierarchical microstructure (HWHMS) composed nanorods was successfully prepared by hydrothermal method. The morphology HWHMS confirmed field-emission scanning electron microscopy, X-ray diffrac...

Metal corrosion is one of the most critical challenges in industrial processes. In this research, nanocomposite coating was synthesized by blending tungsten trioxide (WO3) nanoparticles with Epoxy resin and applied on brass samples to evaluate performance protection under stressed environments. A dip-coating method adopted coat sample's surface. Coated uncoated have been subjected tests study b...

Electron localization and polaron mobility in oxygen-deficient as well as Li-doped monoclinic tungsten trioxide have been studied in the adiabatic limit in the framework of density functional theory. We show that small polarons formed in the presence of oxygen vacancy prefer the bipolaronic W5+-W5+ configuration, whereas the W6+-W4+ configuration is found to be metastable. Our calculations sugg...

Novel surface acoustic wave (SAW) devices using the recent langasite (LGS) family of crystals have been designed, fabricated, and tested for high temperature (up to 750 ◦C) gas sensor applications. The devices were fabricated using platinum (Pt) and palladium (Pd) thin film technology as electrodes and sensing films to withstand temperatures in excess of 1000 ◦C. Combinations of platinum and pl...

Temperature-dependent in situ W L3-edge X-ray absorption spectroscopy has been performed at 20–500 ‡C to investigate the geometric environment and electronic structure of tungsten upon the transformation of electrochromic peroxopolytungstic acid to tungsten trioxide. The temperature-dependent variation of the coordination number and bond distance of the nearest (W–O) sphere reveals that the per...