SnO<sub>2</sub> mesoporous nanoparticle-based gas sensor for highly sensitive and low concentration formaldehyde detection
Pengfei Liu, Jianbin Wang, Han Jin, Meiying Ge, Fang Zhang, Cheng Wang, Yan Sun, Ning Dai
Abstract
mesoporous nanoparticles are fabricated by a facile hydrothermal route with a subsequent acid etching process. The prepared samples show high response toward HCHO (133.5, 222.8 for 100 ppm and 200 ppm HCHO, respectively) and short response/recovery time (15/22 s at 10 ppm). The excellent HCHO sensing performance benefits from the comprehensive regulation of the depletion region width, surface area and rich porosity, which is effective for the promotion of surface adsorption and catalyst activity. It is expected that the excellent sensing properties are promising for practical HCHO gas detection.
Topics & Concepts
Mesoporous materialFormaldehydeAdsorptionMaterials scienceNanoparticleSelectivityPorosityNanotechnologyHydrothermal circulationChemical engineeringCatalysisChemistryOrganic chemistryComposite materialEngineeringGas Sensing Nanomaterials and SensorsAdvanced Chemical Sensor TechnologiesAnalytical Chemistry and Sensors