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<p>This study investigates the humidity sensing response of polyaniline-vanadium pentoxide (PANI-V<sub>2</sub>O<sub>5</sub>) composites. Different mass ratios of V<sub>2</sub>O<sub>5</sub> with PANI were prepared by an in situ polymerization technique to form PANI-V<sub>2</sub>O<sub>5</sub> composites. The specimens were structurally examined and compared using x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) techniques to evaluate their response to humidity. The results showed that as the relative humidity (RH) increased, the resistance of the five composites decreased. The PV5 composite recorded the highest sensing response of 134% at 90% RH, with quick response and recovery time as well as stable sensing performance. Three successive steps of chemisorption, physisorption, and condensation were used to describe the humidity sensing mechanism.</p>

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Preparation of n–p Heterojunction Polyaniline-Vanadium Pentoxide Composite for Moisture Detection

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Kotresh Savanur,
  • Aashis. S. Roy,
  • Ameena Parveen,
  • K. Keshavamurthy,
  • C. Vidya,
  • K. C. Sajjan

摘要

This study investigates the humidity sensing response of polyaniline-vanadium pentoxide (PANI-V2O5) composites. Different mass ratios of V2O5 with PANI were prepared by an in situ polymerization technique to form PANI-V2O5 composites. The specimens were structurally examined and compared using x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) techniques to evaluate their response to humidity. The results showed that as the relative humidity (RH) increased, the resistance of the five composites decreased. The PV5 composite recorded the highest sensing response of 134% at 90% RH, with quick response and recovery time as well as stable sensing performance. Three successive steps of chemisorption, physisorption, and condensation were used to describe the humidity sensing mechanism.