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<p>This study reports the synthesis of a novel bullet-like ZnFe<sub>2</sub>O<sub>4</sub> via a simple hydrothermal method followed by thermal treatment. The crystal structure and morphology of the synthesized ZnFe<sub>2</sub>O<sub>4</sub> were characterized using various techniques, including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. For comparative purposes, ZnO was also produced employing the same synthesis method. The investigation revealed that the optimal working temperature for the gas sensor utilizing bullet-like ZnFe<sub>2</sub>O<sub>4</sub> is 140&#xa0;°C, which is 120&#xa0;°C lower than that of the ZnO-based sensor (260&#xa0;°C). At this optimal temperature, the ZnFe<sub>2</sub>O<sub>4</sub> sensor exhibits favorable performance toward 100&#xa0;ppm acetone, with a response value of 76.14, rapid response time (11&#xa0;s) and recovery time (15&#xa0;s), as well as good selectivity and stability. These results indicate that bullet-like ZnFe<sub>2</sub>O<sub>4</sub> has potential for gas sensing applications, particularly for the selective detection of acetone gas in low-power devices, though its sensing performance may be further improved by structural modification or composite doping.</p>

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Bullet-like ZnFe2O4 for acetone gas sensing application

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • Yan Lu,
  • Yonghua Ma,
  • Xiaoli Xu,
  • Shuyi Ma

摘要

This study reports the synthesis of a novel bullet-like ZnFe2O4 via a simple hydrothermal method followed by thermal treatment. The crystal structure and morphology of the synthesized ZnFe2O4 were characterized using various techniques, including X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. For comparative purposes, ZnO was also produced employing the same synthesis method. The investigation revealed that the optimal working temperature for the gas sensor utilizing bullet-like ZnFe2O4 is 140 °C, which is 120 °C lower than that of the ZnO-based sensor (260 °C). At this optimal temperature, the ZnFe2O4 sensor exhibits favorable performance toward 100 ppm acetone, with a response value of 76.14, rapid response time (11 s) and recovery time (15 s), as well as good selectivity and stability. These results indicate that bullet-like ZnFe2O4 has potential for gas sensing applications, particularly for the selective detection of acetone gas in low-power devices, though its sensing performance may be further improved by structural modification or composite doping.