Recent advances in 2D/nanostructured metal sulfide-based gas sensors: Mechanisms, applications, and perspectives

H. Tang, L.N. Sacco, S. Vollebregt, Huaiyu Ye, Xuejun Fan, Kouchi Zhang

Research output: Contribution to journalReview articleScientificpeer-review

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Abstract

2D and nanostructured metal sulfide materials are promising in the advancement of several gas sensing applications due to the abundant choice of materials with easily tunable electronic, optical, physical, and chemical properties. These applications are particularly attractive for gas sensing in environmental monitoring and breath analysis. This review gives a systematic description of various gas sensors based on 2D and nanostructured metal sulfide materials. Firstly, the crystal structures of metal sulfides are introduced. Secondly, the gas sensing mechanisms of different metal sulfides based on density functional theory analysis are summarised. Various gas-sensing concepts of metal sulfide-based devices, including chemiresistors, functionalized metal sulfides, Schottky junctions, heterojunctions, field-effect transistors, and optical and surface acoustic wave sensors, are compared and presented. It then discusses the extensive applications of metal sulfide-based sensors for different gas molecules, including volatile organic compounds (i.e., acetone, benzene, methane, formaldehyde, ethanol, and liquefied petroleum gas) and inorganic gas (i.e., CO2, O2, NH3, H2S, SO2, NOx, CH4, H2, and humidity). Finally, a strengths-weaknesses-opportunities-threats (SWOT) analysis is proposed for future development and commercialization in this field. This journal is

Original languageEnglish
Pages (from-to)24943-24976
Number of pages34
JournalJournal of Materials Chemistry A
Volume8
Issue number47
DOIs
Publication statusPublished - 2020

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