Citation: Guangji Zhang, Ziwei Zhang, Weixiao Hou, Jifan Hu, Kewei Zhang, Zhigang Sun, Jiangwei Ma. Oxygen vacancy-rich In₂O₃/V₂CT_x MXene heterojunction: Interface engineering enables ultra-sensitive room-temperature Cl₂ sensing[J]. Chinese Chemical Letters, ;2026, 37(12): 111913. doi: 10.1016/j.cclet.2025.111913 shu

Oxygen vacancy-rich In₂O₃/V₂CT_x MXene heterojunction: Interface engineering enables ultra-sensitive room-temperature Cl₂ sensing

Guangji Zhang ^{a, b} ,
Ziwei Zhang ^{a, b} ,
Weixiao Hou ^{a, b} ,
Jifan Hu ^{a, b} ,
Kewei Zhang ^{a, b} ,
Zhigang Sun ^{a, b} ,
Jiangwei Ma ^{a, b, *,}

a.
School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
b.
Laboratory of Magnetic and Electric Functional Materials and the Applications, The Key Laboratory of Shanxi Province, Taiyuan 030024, China

jiangweima@tyust.edu.cn

Received Date: 31 July 2025
Revised Date: 22 September 2025
Accepted Date: 27 September 2025
Available Online: 28 September 2025

Figures(12)

Sensors based on metal oxide semiconductor (MOS) for chlorine (Cl₂) usually have a very high operating temperature (≥200 °C). It is imperative to develop the high-performance room-temperature Cl₂ sensors. In this study, a high-sensitivity V_O-In₂O₃/MXene heterojunction sensor with abundant oxygen vacancies was fabricated for Cl₂ detection at room temperature. To prepare In₂O₃ nanoparticles with abundant oxygen vacancies (V_O-In₂O₃), the precursors were treated in an argon atmosphere. Cetyltrimethylammonium bromide (CTAB) was then used as a surfactant to facilitate the electrostatic assembly of the V₂CT_x MXene nanosheets and V_O-In₂O₃ nanoparticles, thereby forming a unique heterostructure. The heterojunction enables the sensor to reduce its operating temperature to room temperature, while the abundant oxygen vacancies guarantee the high gas response of the sensor. Results of the gas-sensing performance tests indicate that the V_O-In₂O₃/MXene heterojunction sensor exhibits a high response of 22.85% toward 0.5 ppm Cl₂ at 25 °C, with a detection limit as low as 1.05 ppb and good stability. Such exceptional performance indicates that the use of V_O-In₂O₃/MXene heterojunction sensor for Cl₂ detecting at room temperature has great application prospects.
- In₂O₃,
- V₂CT_x MXene,
- CTAB,
- Cl₂,
- Gas sensing
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Oxygen vacancy-rich In2O3/V2CTx MXene heterojunction: Interface engineering enables ultra-sensitive room-temperature Cl2 sensing

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通讯作者: 陈斌, bchen63@163.com

Oxygen vacancy-rich In₂O₃/V₂CT_x MXene heterojunction: Interface engineering enables ultra-sensitive room-temperature Cl₂ sensing