SnO 2 mesoporous nanoparticle-based gas sensor for highly sensitive and low concentration formaldehyde detection

作者：Pengfei Liu, Jianbin Wang, Han Jin, Meiying Ge, Fang Zhang, Cheng Wang, Yan Sun, Ning Dai · 发表于：RSC Advances · 年份：2023 · DOI：10.1039/d2ra06745e · 被引用次数：28 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、Analytical Chemistry and Sensors

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.