Template-free synthesis of vanadium sesquioxide (V₂O₃) nanosheets and their room-temperature sensing performance

Abstract

Single-step growth of V2O3 nanosheets on glass substrates has been established for room-temperature ammonia sensing.

Two-Dimensional Vanadium Carbide MXene for Gas Sensors with Ultrahigh Sensitivity Toward Nonpolar Gases

“…XPS analysis showed peaks related to V–O, V–C–O, V–C–(OH) x , and H 2 O components. These components can be related to the oxygen and hydroxyl functional groups, interlayer water, and possible vanadium oxide (VO x ) species present as the result of partial surface oxidation of V 2 CT x MXene. ,,, It is previously reported that some MXenes, in particular, delaminated V 2 CT x , can be partially oxidized at their surface in ambient atmospheres or slightly elevated temperatures and form oxide and oxycarbide surface layers. ,, These results are also consistent with our recent report on thermal stability of V 2 CT x MXene under different atmospheres . The F 1s region of the XPS spectrum (Figure d) showed F components related to fluorine termination of MXenes as well as residual carbon–fluoride bonds at 684.07 and 686 eV, respectively.…”

“…These components can be related to the oxygen and hydroxyl functional groups, interlayer water, and possible vanadium oxide (VO x ) species present as the result of partial surface oxidation of V 2 CT x MXene. 40,44,46,47 It is previously reported that some MXenes, in particular, delaminated V 2 CT x , can be partially oxidized at their surface in ambient atmospheres or slightly elevated temperatures and form oxide and oxycarbide surface layers. 23,40,44 These results are also consistent with our recent report on thermal stability of V 2 CT x MXene under different atmospheres.…”

Porous reduced graphene oxide (rGO)/WO3 nanocomposites for the enhanced detection of NH3 at room temperature

“…6 A number of studies based on metal oxide semiconductor nanoparticles, like zinc oxide (ZnO), tin oxide (SnO 2 ), indium oxide (In 2 O 3 ), tungsten oxide (WO 3 ), molybdenum oxide (MoO 3 ) and vanadium oxide (V 2 O 5 ) were conducted towards the development of NH 3 gas sensors. [7][8][9][10] Among these metal oxides, WO 3 , an n-type semiconductor, is considered as a forefront material for chemiresistive gas sensing application. The sensing effects of WO 3 nanoparticles are determined by the capability of tungsten ions to change their valence state upon oxidation/ reduction.…”

Enhanced Ammonia Sensing By Cost-Effective ZnO Thin Films Through Yttrium Doping

“…The roughness value for pure ZnO increases from 26 to 46 nm due to the influence of yttrium doping. This increase in roughness results in more active centres for gas adsorption favouring better sensing as explained by Wenzel's effect [37,38]. EDX was used to identify the presence of elements in the prepared films.…”