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Dual-Functional Tungsten-Doped NiO for Highly Sensitive Triethylamine Sensor with ppb Level Detection Limit
Shangyan Wang1,2,3, Mengjie Wang1,2,3, Junkai Shao1,2,3
1School of Electronics and Information Engineering, Tianjin Key Laboratory of Electronic Materials and Devices, Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin 300401, China.
ACS Applied Materials & Interfaces
|September 12, 2024
Summary
Tungsten-doped Nickel oxide (NiO) nanoflowers show enhanced triethylamine sensing. This novel material offers superior sensitivity and a lower detection limit for triethylamine gas detection.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Sensing
Background:
- Nickel oxide (NiO) is a promising material for gas sensors.
- Improving the sensitivity and selectivity of NiO-based sensors is crucial for practical applications.
- Tungsten doping can modify the electronic and structural properties of NiO.
Purpose of the Study:
- To synthesize W-doped NiO nanoflowers using a hydrothermal method.
- To investigate the effect of tungsten doping on the sensing performance of NiO toward triethylamine.
- To optimize the doping concentration for enhanced triethylamine detection.
Main Methods:
- Hydrothermal synthesis of W-doped NiO nanoflowers.
- Characterization of material properties (e.g., surface area, oxygen vacancies).
- Fabrication and testing of gas sensors for triethylamine detection.
Main Results:
- W-doped NiO nanoflowers exhibited significantly increased specific surface area and reduced oxygen vacancy formation energy.
- The sensor with 4 at % W-doped NiO showed exceptional sensitivity to triethylamine (229.0 at 100 ppm).
- A 135-fold enhancement in sensitivity and rapid response/recovery times (8 s/30 s) were achieved, with a low detection limit.
Conclusions:
- Dual-functional tungsten doping effectively enhances the sensing performance of NiO toward triethylamine.
- Optimized W-doped NiO nanoflowers offer a highly sensitive and rapid gas sensing solution.
- This study presents a promising pathway for developing advanced triethylamine sensors.
