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ZIF-8-Derived Multifunctional Triethylamine Sensor.

Shuo Xiao1, Zheng Jiao1, Xuechun Yang1

  • 1School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.

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Summary
This summary is machine-generated.

This study presents a novel multifunctional sensor for detecting toxic triethylamine (TEA), a common volatile organic compound (VOC). The In-doped ZIF-8 and its derivative ZnO/In2O3 offer sensitive and selective detection in both water and air.

Keywords:
ZIF-8sensortriethylamine

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Area of Science:

  • Materials Science
  • Environmental Science
  • Chemical Engineering

Background:

  • Triethylamine (TEA) is a toxic volatile organic compound (VOC) prevalent in industrial emissions.
  • Effective detection of TEA in air and water is crucial due to its harmful effects.
  • Fluorescence and resistive sensing are established methods for pollutant detection.

Purpose of the Study:

  • To design and prepare a multifunctional sensor for triethylamine (TEA) detection.
  • To evaluate the sensor's performance in both aqueous and gaseous phases.
  • To develop a highly sensitive and selective TEA sensor for environmental monitoring.

Main Methods:

  • Synthesis of In-doped interpenetrating twin ZIF-8 (ZIF-8-In).
  • Annealing ZIF-8-In to form ZnO/In2O3 derivative with a porous hierarchical structure.
  • Testing ZIF-8-In for fluorescence detection of TEA in water.
  • Fabricating and testing ZnO/In2O3 for resistive gas sensing of TEA.

Main Results:

  • ZIF-8-In showed dose-dependent fluorescence enhancement for TEA in water (1-100 ppm, LOD 1 ppm).
  • The ZnO/In2O3 gas sensor exhibited a high response (Ra/Rg = 107.7) for 100 ppm TEA, with a detection limit of 1 ppm.
  • The ZnO/In2O3 sensor demonstrated excellent selectivity for TEA over other VOCs (response >10 times).

Conclusions:

  • The developed multifunctional sensor (ZIF-8-In and ZnO/In2O3) effectively detects TEA in both water and air.
  • The sensor exhibits high sensitivity, low detection limits, and excellent selectivity.
  • This material shows significant promise for complex environmental monitoring applications.