Recent Advances in Gas and Humidity Sensors Based on 3D Structured and Porous Graphene and Its Derivatives

Haojun Ding, Yaoming Wei, Zixuan Wu, Kai Tao, Minghui Ding, Xi Xie, Jin Wu

Research output: Contribution to journalReview articlepeer-review

67 Scopus citations

Abstract

Compared with two-dimensional (2D) graphene sheets, recently, three-dimensional (3D) structured and porous graphene has attracted much attention in gas and humidity sensing owing to its increased specific surface area, abundant reaction sites, and superior sensing performance. This review begins with the introduction of the device configurations and working mechanisms of 3D graphene-based gas sensors, followed by the elaboration of various synthesis strategies of 3D graphene. In addition to the gas-transducing properties of 3D and suspended graphene, the modification effect of metal oxides, small molecules, conductive polymers, noble metal nanoparticles, 2D materials, etc. on the gas-sensing performance of 3D graphene is also systematically discussed. 3D structured graphene not only performs as excellent gas-sensing material but also shows great advantages in humidity sensing due to its porous structure and a large number of adsorption sites for moisture. The humidity-sensing mechanism is elucidated to reveal the reactions between graphene and water molecules, followed by the introduction of devices. Finally, the existing key challenges that hinder the further development and practical application of 3D graphene-based gas/humidity sensors are presented, followed by proposing the future perspectives.

Original languageEnglish
Pages (from-to)1381-1411
Number of pages31
JournalACS Materials Letters
Volume2
Issue number11
DOIs
StatePublished - 2 Nov 2020

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