Graphene-metal sulfide composite based gas sensors for environmental sustainability: A review

Balram, Deepak; Lian, Kuang-Yow; Sebastian, Neethu; Kumar, Vineet; Yadav, Virendra Kumar; Patel, Ashish; Singh, Kulvinder

doi:10.1016/j.sintl.2023.100269

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Graphene Decorated With Mo₃S₇ Clusters for Sensing CO₂

Casanova‐Chafer,

Llobet,

Feliz

2024

Adv Materials Inter

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This paper reports for the first time a gas‐sensitive nanohybrid based on trinuclear molybdenum sulfido clusters ((Bu4N)2[Mo3(μ3‐S)(μ‐S2)3Cl6] (Mo3S7)) supported on graphene flakes (Mo3S7@Graphene). The nanomaterial, once implemented in a chemoresistive device, changes its electrical resistivity when exposed, at room temperature (RT), to toxic and harmful gases, such as hydrogen (H2), carbon dioxide (CO2), carbon monoxide (CO), and benzene. Particularly, the Mo3S7@Graphene hybrid shows an outstanding sensing performance toward CO2. Theoretical calculations provide a better understanding of the plausible gas sensing mechanisms. These findings open the door for a new generation of molybdenum sulfido cluster‐based sensors in which electronic interrogation can be implemented, advancing toward the realization of highly sensitive gas sensing.

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