Breakthrough in Nanotechnology: Hefei Researchers Develop Highly Sensitive Gas Sensors

Strategic Insights -

Researchers from Hefei University of Technology in the People's Republic of China have made a significant breakthrough in nanotechnology, developing a new ternary heterostructure composite of Ti3C2Tx/TiO2/CuO that has the potential to revolutionize gas sensing applications. The team, led by Xuefeng Hu, has engineered a scalable one-step hydrothermal synthesis method to overcome the limitations of two-dimensional transition metal carbides (MXenes), which have excellent metal conductivity and tunable surface chemistry but are prone to chemical instability and oxidation. The resulting composite exhibits exceptional selectivity and response to ethanol, achieving a response of 230% toward 5 ppm ethanol at room temperature, with rapid response and recovery times (32 s/261 s), robust repeatability, and long-term stability (60 days).

Key Takeaways:

  • Researchers from Hefei University of Technology have developed a ternary heterostructure composite of Ti3C2Tx/TiO2/CuO with high sensitivity to ethanol gas.
  • The composite was synthesized using a scalable one-step hydrothermal synthesis method, addressing the limitations of MXenes.
  • The optimized Ti3C2Tx/TiO2/CuO sensor achieved a response of 230% toward 5 ppm ethanol at room temperature.
  • The sensor demonstrated rapid response and recovery times (32 s/261 s) and robust repeatability and long-term stability (60 days).
  • The research has potential applications in food quality control and environmental safety.
  • Funding for this research was provided by the Key Projects of the Anhui Science and Technology Breakthrough Program, Natural Science Foundation of Anhui Province, National Natural Science Foundation of China (NSFC), Anhui Science and Technology Major Project, and University Synergy Innovation Program of Anhui Province.

Statistics:

  • Response increase: 230% (|Ra-Rg|/Ra x 100%) toward 5 ppm ethanol at room temperature.
  • Response time: 32 s.
  • Recovery time: 261 s.
  • Stability period: 60 days.
  • Funding support: Multiple programs including Key Projects of the Anhui Science and Technology Breakthrough Program, Natural Science Foundation of Anhui Province, National Natural Science Foundation of China (NSFC), Anhui Science and Technology Major Project, and University Synergy Innovation Program of Anhui Province.

Sources:

  • [Chemical Engineering Journal, 2025; 522]
  • [Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland]
  • [Xuefeng Hu, Hefei University of Technology, Anhui Prov Engn Res Ctr Semicond Inspect, Anhui Prov Key Lab Measuring Theory & Precis Instr, School of Instrumention Science & Optoelectronics Engineering, Hefei 230009, People's Republic of China]
  • [Ming Zhou, Zhiyuan Liu, Weiwei Qin, Liping Tan, Jilei Yang, Yali Bi, Wei Zhang, Debao Yu, Qingqing Mu, Anquan Bao, and Wenjuan Yu]
  • [NewsRx, Nanotechnology Weekly, October 27, 2025, p 2131]