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<p>Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanosheets were prepared using alcohols-water solvothermal process with polyvinylpyrrolidone (PVP) as a capping agent. The structure, morphology and crystal phase of the Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N₂ adsorption–desorption. The results showed that the Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanosheets were composed of nanocrystals with the average crystallite size of approximately 28 nm. The nanocrystals self-assembled to form nanosheets with a thickness of 50 nm and the length and width ranging from 100 to 2000 nm. The sensor based on the Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanosheets prepared with mixed solvent exhibited significantly improved gas-sensing performances than the Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> prepared by conventional hydrothermal treatment. The sensor based on the Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanosheets showed high response of 36, 385 to 1 ppm and 100 ppm n-butanol at 160 ℃, respectively, with the response and recovery time both less than 20 s. The Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanosheets can be a promising candidate gas-sensing material for selective and rapid detection of n-butanol at low working temperature.</p>

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Novel ethanol–water solvothermal synthesis of Fe2(MoO4)3 nanosheets with enhanced gas sensing performances

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Miao Hu,
  • Yiyue Wang,
  • Ping Fu,
  • Zhe Chen,
  • Zhidong Lin,
  • Liming Liu

摘要

Fe2(MoO4)3 nanosheets were prepared using alcohols-water solvothermal process with polyvinylpyrrolidone (PVP) as a capping agent. The structure, morphology and crystal phase of the Fe2(MoO4)3 were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N₂ adsorption–desorption. The results showed that the Fe2(MoO4)3 nanosheets were composed of nanocrystals with the average crystallite size of approximately 28 nm. The nanocrystals self-assembled to form nanosheets with a thickness of 50 nm and the length and width ranging from 100 to 2000 nm. The sensor based on the Fe2(MoO4)3 nanosheets prepared with mixed solvent exhibited significantly improved gas-sensing performances than the Fe2(MoO4)3 prepared by conventional hydrothermal treatment. The sensor based on the Fe2(MoO4)3 nanosheets showed high response of 36, 385 to 1 ppm and 100 ppm n-butanol at 160 ℃, respectively, with the response and recovery time both less than 20 s. The Fe2(MoO4)3 nanosheets can be a promising candidate gas-sensing material for selective and rapid detection of n-butanol at low working temperature.