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In situ construction of a Zn2SnO4/TiO2/Ti3C2Tx heterostructured composite allows for rapid sensing of n-hexanol under

Xueyan Zhong1, Keyue Gong1, Ying Liu1

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This study enhances n-hexanol gas detection using a novel Zn2SnO4/TiO2/MXene composite. The material

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Sensing

Background:

  • Oxygen vacancies in metal oxides are critical for gas sensing.
  • Zn2SnO4 is a promising material, but its performance can be improved.
  • Developing efficient sensors for n-hexanol is important for various applications.

Purpose of the Study:

  • To synthesize a nano-heterostructured composite of Zn2SnO4, TiO2, and MXene for enhanced n-hexanol gas detection.
  • To investigate the role of oxygen vacancy concentration and photocatalytic properties in gas sensing.
  • To optimize the composite for rapid and sensitive detection at lower temperatures.

Main Methods:

  • Synthesis of Zn2SnO4/TiO2/MXene composite via calcination.
  • Material characterization using various techniques.
  • Gas sensing measurements under different conditions (UV illumination).

Main Results:

  • The composite significantly increased oxygen vacancy concentration and surface area.
  • The Zn2SnO4/TiO2/MXene composite showed enhanced sensitivity and rapid response/recovery times for n-hexanol.
  • UV illumination reduced the optimal working temperature by 55 °C and increased sensitivity by 2.9 times.

Conclusions:

  • The synergistic effect between heterostructured phases and TiO2's photocatalytic activity enhances n-hexanol sensing.
  • Modulating oxygen vacancy concentration and photocatalytic activity is a viable strategy for high-performance gas sensors.
  • The developed composite offers a promising solution for efficient n-hexanol detection.