4.7 Review

Recent developments of nanomaterials-based conductive type methane sensors

期刊

RARE METALS
卷 40, 期 6, 页码 1515-1527

出版社

NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-020-01679-9

关键词

Nanomaterials; Methane sensors; Conductive gas sensors; Sensing mechanism

资金

  1. Fundamental Research Funds for the Central Universities [2020QN69]

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Conductive-type methane sensors are small, simple and stable devices that are ideal for mining safety and home safety applications. Recent research on nanomaterials-based sensors focuses on synthetic methods, sensing mechanisms, and the relationship between sensing performance and the structures and components of the nanomaterials. The future trends and perspectives of nanomaterials-based methane sensors are also discussed in the review.
Methane is an explosive gas in coalmines and needs to be monitored by methane sensors. Conductive-type methane sensors are small, simple and stable, and they are very promising for mining safety or home safety applications. They can even be employed in mining Internet of things if the power consumption can be lowered down to few milliwatts. Many researches of nanomaterials-based conductive-type methane sensors have been reported recently. This review intends to present a comprehensive and critical summary on the recent progresses in the nanomaterials-based conductive-type methane sensors field. Many excellent methane-sensitive nanomaterials will be present, such as SnO2, ZnO, TiO2, WO3, carbon nanotubes, graphene, rare earth metal-based perovskite oxides and their hybrids. Particular attention is given to the synthetic methods of the nanomaterials, sensing mechanisms of the nanomaterials and the relationship between the sensing performance and the structures and components of the nanomaterials. Finally, the future trends and perspectives of nanomaterials-based conductive-type methane sensors are proposed.

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