Biosensor National Special Laboratory Department of Biomedical Engineering, Zhejiang University, Hangzhou, 310027, China.
Intelligent Perception Research Institute, Zhejiang Lab, Hangzhou, China.
Talanta. 2022 Aug 15;246:123527. doi: 10.1016/j.talanta.2022.123527. Epub 2022 May 9.
Semiconductor metal oxide (SMO) gas sensors have attracted considerable attention for detecting environmental pollution, as well as the accidental leakage of flammable, explosive, and toxic gases. SMOs are known to exhibit high sensitivity, fast response time, and excellent selectivity towards various types of gases. Many new strategies have been implemented to improve these characteristics. Among the materials produced by these methods, nanomaterials (NMs) synthesized by electrospinning have unprecedented advantages, including catalyst introduction, morphological control, thermodynamic stability, unique physicochemical properties, composition adjustment, and rapid adsorption-desorption rates of the NMs, and are appealing for the designing highly sensitive and selective gas sensors. This review highlights the latest findings on the design and fabrication of electrospun gas sensors for detecting various gases including hydrogen (H), methane (CH), nitrogen monoxide (NO), hydrogen sulfide (HS), ammonia (NH), ethanol (CHOH), acetone (CHCOCH), formaldehyde (HCHO) and toluene (CHCH). Studies have indicated that NMs with different shapes (e.g., nanotubes, nanowires, nanoflowers, nanosheets, nanorods, nanofilms, and nanofibers) and compositions (single-phase SMOs, modified SMOs, nanocomposites of SMOs, and SMOs combined with carbon nanomaterials) display high response values, long-term stability, low humidity dependence, fast response/recovery times, and low detection limits for gases. Finally, conclusions and future perspectives for gas sensors based on the electrospinning technique are discussed.
半导体金属氧化物 (SMO) 气体传感器在检测环境污染以及易燃、易爆和有毒气体的意外泄漏方面引起了相当大的关注。SMO 被认为对各种类型的气体具有高灵敏度、快速响应时间和优异的选择性。许多新的策略已经被实施来改善这些特性。在这些方法生产的材料中，通过电纺合成的纳米材料 (NMs) 具有前所未有的优势，包括催化剂引入、形态控制、热力学稳定性、独特的物理化学性质、组成调整以及 NM 的快速吸附-解吸速率，对于设计高灵敏度和选择性的气体传感器很有吸引力。这篇综述强调了用于检测各种气体的电纺气体传感器的设计和制造的最新发现，包括氢气 (H)、甲烷 (CH)、一氧化氮 (NO)、硫化氢 (HS)、氨 (NH)、乙醇 (CHOH)、丙酮 (CHCOCH)、甲醛 (HCHO) 和甲苯 (CHCH)。研究表明，具有不同形状的 NM（例如，纳米管、纳米线、纳米花、纳米片、纳米棒、纳米薄膜和纳米纤维）和组成（单相 SMO、改性 SMO、SMO 纳米复合材料和 SMO 与碳纳米材料的组合）表现出高响应值、长期稳定性、低湿度依赖性、快速响应/恢复时间以及对气体的低检测限。最后，讨论了基于电纺技术的气体传感器的结论和未来展望。
