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<p>SnO<sub>2</sub>/Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanocomposites were prepared by two-step hydrothermal processes. The SnO<sub>2</sub>/Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanocomposite with a molar ratio of Sn to Fe of 1.4 consisted of rutile-type SnO<sub>2</sub> and monoclinic Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub>, and the crystallite sizes of SnO<sub>2</sub> and Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> in the composite were about 8&#xa0;nm. The sensor based on the SnO<sub>2</sub>/Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanocomposite shows a high response of 116.7 to 100 ppm xylene at 200&#xa0;°C, which was 9.8 times higher than the pure SnO<sub>2</sub> sensor. The SnO<sub>2</sub>/Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> sensor exhibited excellent response, low detection limit, and selectivity to xylene compared with the SnO<sub>2</sub> sensor. The improved gas-sensing of the SnO<sub>2</sub>/Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> nanocomposite was ascribed to the tiny nanocrystallites and large specific surface area and the good catalysis and absorption of Fe<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> to xylene.</p> Graphical Abstract <p></p>

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Preparation and Xylene Gas Sensing Performances of SnO2/Fe2(MoO4)3 Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年12月15日

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

摘要

SnO2/Fe2(MoO4)3 nanocomposites were prepared by two-step hydrothermal processes. The SnO2/Fe2(MoO4)3 nanocomposite with a molar ratio of Sn to Fe of 1.4 consisted of rutile-type SnO2 and monoclinic Fe2(MoO4)3, and the crystallite sizes of SnO2 and Fe2(MoO4)3 in the composite were about 8 nm. The sensor based on the SnO2/Fe2(MoO4)3 nanocomposite shows a high response of 116.7 to 100 ppm xylene at 200 °C, which was 9.8 times higher than the pure SnO2 sensor. The SnO2/Fe2(MoO4)3 sensor exhibited excellent response, low detection limit, and selectivity to xylene compared with the SnO2 sensor. The improved gas-sensing of the SnO2/Fe2(MoO4)3 nanocomposite was ascribed to the tiny nanocrystallites and large specific surface area and the good catalysis and absorption of Fe2(MoO4)3 to xylene.

Graphical Abstract