Tailoring the ethanol selectivity of SnO₂-based MEMS gas sensors <i>via</i> WO₃-loading in double-pulse-driven mode.

ABSTRACT: This work demonstrates a strategy to tailor the ethanol selectivity of SnO₂-based MEMS gas sensors by combining WO₃ loading with a pulse-driven heating mode. This dynamic operating mode separates the sensing signal, allowing for the distinction between an initial transient response in the target gas atmosphere (S _p) and a total response (S _i). WO₃-loaded SnO₂ nanoparticles (NPs) were synthesized via hydrothermal treatment and impregnation methods. The optimal 1.5 mol% WO₃-loaded SnO₂ (1.5-W-Sn) exhibited highly dispersed WO₃ species and an enhanced specific surface area. At measurement temperature of 350 °C, the 1.5-W-Sn sensor showed selectivity toward 10 ppm ethanol wit

SUBMITTER: Ren T 

PROVIDER: S-EPMC12687727 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature