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Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
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V2O5/polypyrrole core-shell nanotubes for gas sensor.

Wei Jin1, Wen Chen, Yu Lu

  • 1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, PR China.

Journal of Nanoscience and Nanotechnology
|March 14, 2012
PubMed
Summary
This summary is machine-generated.

Vanadium oxide/polypyrrole core-shell nanotubes demonstrate excellent ethanol gas sensing at room temperature. This novel structure offers high response, stability, and fast recovery times for gas sensor applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Developing advanced materials for gas sensing is crucial for environmental monitoring and safety.
  • Nanostructured metal oxides and conducting polymers offer unique properties for sensor applications.

Purpose of the Study:

  • To synthesize and characterize V2O5/polypyrrole core-shell nanotubes.
  • To evaluate the gas sensing performance of these nanostructures for ethanol detection.

Main Methods:

  • In situ polymerization of pyrrole on vanadium oxide nanotubes.
  • Characterization using FTIR, TEM, and XRD.
  • Gas sensing measurements at room temperature.

Main Results:

  • Successful synthesis of V2O5/polypyrrole core-shell nanotubes with uniform polypyrrole coating (30 nm).
  • Enhanced thermal stability of polypyrrole due to synergistic interactions.
  • High response, good stability, and short response/recovery times for ethanol detection.

Conclusions:

  • The V2O5/polypyrrole core-shell nanostructure exhibits significant potential for highly effective ethanol gas sensors.
  • The observed enhanced performance is attributed to the formation of a p-n heterojunction and synergistic effects between the core and shell materials.