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Preparation of Silicon Nanowire Field-effect Transistor for Chemical and Biosensing Applications
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TiO2 nanotube array sensor for detecting the SF6 decomposition product SO2.

Xiaoxing Zhang1, Jinbin Zhang, Yichao Jia

  • 1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China. zhxx@cqu.edu.cn

Sensors (Basel, Switzerland)
|June 28, 2012
PubMed
Summary

This study introduces a titanium dioxide (TiO2) nanotube array sensor for detecting sulfur dioxide (SO2), a key indicator of partial discharge in sulfur hexafluoride (SF6) gas-insulated switchgear. The sensor demonstrates effective SO2 detection and enhanced performance with UV radiation.

Keywords:
SF6 decomposed componentsSO2 gasTiO2 nanotube arraysensor response

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Environmental Monitoring

Background:

  • Partial discharge in gas-insulated switchgear (GIS) is critical for power equipment health.
  • Analyzing SF6 gas decomposition products aids in diagnosing equipment status.
  • Early detection of SF6 degradation is essential for preventing failures.

Purpose of the Study:

  • To develop a novel sensor for detecting SO2, a primary SF6 decomposition product.
  • To investigate the application of TiO2 nanotube arrays for enhanced gas sensing.
  • To assess the sensor's performance and recovery characteristics.

Main Methods:

  • Fabrication of highly ordered TiO2 nanotube arrays using anodic oxidation.
  • Testing the sensor's response to varying concentrations of SO2 (10-50 ppm).
  • Evaluating the effect of ultraviolet (UV) radiation on sensor performance and longevity.

Main Results:

  • The TiO2 nanotube sensor array exhibited a sensitive response to SO2 gas.
  • UV radiation significantly improved sensor efficiency by removing attached components.
  • UV treatment reduced chemical poisoning and extended the sensor's operational lifespan.

Conclusions:

  • TiO2 nanotube arrays are effective for detecting SO2, a critical SF6 decomposition product.
  • UV-assisted regeneration enhances sensor durability and reliability for partial discharge monitoring.
  • This technology offers a promising approach for real-time assessment of power equipment integrity.