The Effect of Fe(Ⅲ) Doping on Structure and Gas Sensing Properties of Ultrathin W<sub>18</sub>O<sub>49</sub> Nanowires

DU Shuaihang; YUE Lu; GUAN Rongfeng; YANG Xiuli; XU Ning; ZHANG Wenhui

doi:10.6054/j.jscnun.2021039

Journal of South China Normal University (Natural Science Edition) > 2021 > 53(3): 22-28. > DOI: 10.6054/j.jscnun.2021039

DU Shuaihang, YUE Lu, GUAN Rongfeng, YANG Xiuli, XU Ning, ZHANG Wenhui. The Effect of Fe(Ⅲ) Doping on Structure and Gas Sensing Properties of Ultrathin W₁₈O₄₉ Nanowires[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(3): 22-28. DOI: 10.6054/j.jscnun.2021039

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The Effect of Fe(Ⅲ) Doping on Structure and Gas Sensing Properties of Ultrathin W₁₈O₄₉ Nanowires

1.
Jiangsu Key Laboratory of New Environmental Protection, Yancheng Institute of Technology, Yancheng 224051, China
2.
School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, China

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Received Date: January 20, 2021
Available Online: July 05, 2021

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Abstract

Abstract

Fe(Ⅲ)-doped ultrathin tungsten oxide (Fe-W₁₈O₄₉) nanowires were prepared with the simple solvent-thermal method to optimize the acetone-sensing performance of tungsten oxide acetone sensor materials for reason of the low response, poor selectivity and high detection temperature of pure tungsten oxide. The results showed that Fe(Ⅲ) doping not only inhibited the transformation of W₁₈O₄₉ crystal phase to WO₃ crystal phase but also optimized its gas-sensing performance. The W₁₈O₄₉ nanowires with doping ratio (n(Fe)/n(W)) of 0.10 demonstrated the best performance. This material showed a sensitivity of 11.4 for acetone with a volume fraction of 5×10^-5 at the optimum operating temperature of 220 ℃, with the response/recovery time of 14/16 s and good selectivity.
- tungsten oxide,
- Fe(Ⅲ) doping,
- ultrathin nanowires,
- gas sensing properties,
- acetone

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The Effect of Fe(Ⅲ) Doping on Structure and Gas Sensing Properties of Ultrathin W18O49 Nanowires

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The Effect of Fe(Ⅲ) Doping on Structure and Gas Sensing Properties of Ultrathin W₁₈O₄₉ Nanowires