Characterization of gasochromic vanadium oxides films by X-ray absorption spectroscopy

Recent advances in vanadium pentoxide (V2O5) towards related applications in chromogenics and beyond: fundamentals, progress, and perspectives

“…The electrical and optical properties varied under exposure to various gases, such as methanol, ethanol, acetone, isopropanol, ammonia, and hydrogen. 4,182,[287][288][289][290] Among them, hydrogen is the most common gas used as a redox gas in gasochromism.…”

“…Dong's research group has revealed the GC coloration mechanism based on a thin platinum (Pt) layer as a catalyst coated on V 2 O 5 thin film to dissociate the hydrogen molecules. 4,288,290,299,300 Different factors, such as synthesis methods (sol-gel and RFS), layer thicknesses, and metal dopant in V 2 O 5 , were investigated. A VO x film deposited on a Corning 1737 substrate by RFS showed that the initial film color and colored film were affected by the Ar/O 2 ratio and annealing temperature.…”

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

“…It exhibits a deep blue color upon exposure to hydrogen gas [36]. In addition to WO 3 , other materials reported for gasochromic applications include V 2 O 5 [37][38][39][40], VO x [41], MO x [42], MoO 3 [43] [44], mixed silver/nickel ammonium phosphomolybdate [45], (Ti-V-Ta)O x [35], Ni(OH) 2 [46], peroxopolytungstic acid [47,48], and metals like Y [49]. This effect has also been exploited for the detection of other gases such as volatile organic compounds [50], NO 2 [51], H 2 S, SO 2 [52], NH 3 [53], XeF 2 [54], cyclohexane [55], CO, and Cl 2 [46].…”

Vacuum Based Gas Sensing Material Characterization System for Precise and Simultaneous Measurement of Optical and Electrical Responses

“…On the other hand, fewer systems are capable of the simultaneous measurement of multiple signals [ 23 ]. Several gas sensing materials, such as WO 3 [ 24 , 25 , 26 ], V 2 O 5 [ 27 , 28 , 29 , 30 ], NiO [ 31 , 32 ], and Pd [ 33 , 34 ], not only produce electrical responses but also undergo changes in transmittance, reflectivity, and dielectric constant, among other parameters, when encountering a specific gas. Hence, the simultaneous testing of multiple parameters, particularly electrical and optical signals, is of great importance to the research of the response mechanisms of these materials and to improve the gas sensing performances.…”