A facile method for preparation of porous nitrogen-doped Ti3C2TxMXene for highly responsive acetone detection at high temperature

Zijing Wang, Fen Wang, Angga Hermawan, Jianfeng Zhu, Shu Yin

Research output: Contribution to journalArticlepeer-review

Abstract

Porous nitrogen-doped Ti3C2Tx MXene (N-TCT) with a three-dimensional network structure is synthesized via a simple sacrifice template method and then utilized as an acetone gas sensor. By introducing nitrogen atoms as heteroatoms into Ti3C2Tx nanosheets, some defects generate around the doped nitrogen atoms, which can greatly improve the surface hydrophilicity and adsorption capacity of Ti3C2Tx Mxene nanosheets. It resulted in the enhanced gas sensitivity, achieving a response value of about 36 (ΔR/Ra) × 100%) and excellent recovery time (9s) at 150 °C. Compared with the pure Ti3C2Tx-based gas sensor (381/92s), the response and recovery time are both obviously improved, and the response value increased by 3.5 times. The gas-sensing mechanism of the porous N-TCT is also discussed in detail. Based on the excellent gas sensitivity of porous N-TCT for highly responsive acetone detection at high temperatures, the strategy of nitrogen-doped two-dimensional nanomaterials can be extended to other nanomaterials to realize their potential applications.

Original languageEnglish
Article number2151043
JournalFunctional Materials Letters
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • acetone gas sensor
  • Nitrogen-doped TiCT
  • sensing mechanism
  • template synthesis

ASJC Scopus subject areas

  • Materials Science(all)

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