To　effectively　detect　the　volatile　terpineol　and　butyl　xanthate　gases　produced　during　the　flotation　process　in　mineral　processing　plants,　Co3O4　nanosheets,　Co3O4　nanoparticles,　and　Co3O4　nanoflowers　were　synthesized　via　one-pot　hydrothermal　method　as　sensing　materials.　The　crystal　structure　and　microscopic　morphology　of　the　synthesized　materials　were　characterized　using　XRD,　SEM　and　TEM,　respectively.　The　specific　surface　area　and　pore-size　distribution　were　recorded　using　BET.　The　elemental　distribution　and　valence　states　were　analyzed　using　XPS,　and　the　chemical　bonds　and　functional　groups　were　analyzed　using　FTIR.　The　gas　sensing　properties　demonstrated　that　Co3O4　nanosheets　exhibited　superior　sensing　performance　over　Co3O4　nanoparticles　and　Co3O4　nanoflowers.　The　Co3O4　nanosheets　showed　maximum　responses　of　8.06　and　9.17　to　50　ppm　volatile　terpineol　and　200　ppm　volatile　butyl　xanthate　gases　at　the　optimal　operating　temperature　of　200°C,　respectively,　as　well　as　favorable　gas　sensing　response-recovery　characteristics　and　reproducibility.　The　superior　performance　is　attributed　to　the　abundant　oxygen　vacancies　and　the　distinctive　porous　structure　of　Co3O4　nanosheets.　This　work　significantly　contributes　to　the　development　of　high-performance　gas　sensors　for　the　mining　industry.　©　2025