Research Information System
Journal of Alloys and Compounds, vol.1059, 2026 (SCI-Expanded, Scopus)
This study presents a comprehensive investigation of pristine and noble metal-loaded vanadium pentoxide (V2O5) nanoflower gas sensors for the selective detection of chemical warfare agent simulants (CWAs) and toxic industrial compounds (TICs), including hydrogen sulfide (H2S) and hydrogen cyanide (HCN), dimethyl methyl phosphonate (DMMP), 2-chloroethyl ethyl sulfide (2-CEES), and Dipropylene glycol monomethyl ether (DPGME), measured at concentrations of 1, 10, 20 and 30 ppm. V2O5 nanoflowers synthesized via hydrothermal method were loaded with 0.7 at% silver (Ag) and 2.0 at% platinum (Pt) using a sputtering technique. Pristine V2O5 exhibited limited sensing performance across all analytes. Upon Ag loading, sensor responses significantly improved, particularly for H2S (from 18.27 to 43.43) and HCN (from 14.39 to 88.25), consistent with enhanced catalytic reactivity and surface charge modulation. Pt loading delivered broader enhancement, most notably for DPGME and 2-CEES, with sensor response values rising from 12.23 to 29.89 and 22.24–30.53, respectively. Sensitivity and selectivity radar plots support the distinct performance profiles: Ag loading favors strongly interacting species such as H2S and HCN, whereas Pt provides balanced detection across chemically diverse targets. Heat map and dynamic response analyses further revealed that metal-loaded sensors deliver higher response amplitudes and sharper signal profiles. These results highlight the tunability of V2O5 nanoflower sensors through targeted surface engineering and demonstrate, to our knowledge, the ability of Ag and Pt-loaded V2O5 nanoflowers to collectively detect five chemically distinct CWA related gases.