Scholarlink

<p>In this study, we synthesized porous flower-like ZnFe<sub>2</sub>O<sub>4</sub> (ZF) microspheres by a straightforward hydrothermal method. To enhance the accumulation of chemically adsorbed oxygen and modify the energy surface charge distribution, we employed a doping technique. Given that the ionic radius of Co<sup>2+</sup> is closely comparable to that of Zn<sup>2+</sup>, Co<sup>2+</sup> ions were selected as an appropriate dopant for ZF. We investigated the gas sensing properties of pure ZF and doped with 5 wt% (ZFC5) and 10 wt% cobalt (ZFC10) under varying concentrations (20–500 ppm) of ethylene glycol (EG) at optimal temperature, ambient pressure and relative humidity. All three ZF-based sensing layers exhibited selective sensing capabilities towards EG, with the highest response change observed for the ZFC10 to 100 ppm EG, which was 112% greater than that of acetone. The results show that with increasing cobalt doping, the gas sensor response is significantly enhanced, for example, at 500 ppm EG, the response improved from 107.52 for ZF to 147.74 for ZFC10, with a response time of less than 3&#xa0;s. The porous structure, high specific surface area, and effective doping of the ZFC-based sensor materials show significant potential for gas vapor detection, especially for EG. The results show a significant 28% increase in sensor response compared to our previous work, as well as a reduction in recovery time from 140&#xa0;s to 113&#xa0;s.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A superior ethylene glycol gas sensor based on cobalt doped highly porous ZnFe2O4 microspheres

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月2日

查看全文
  • Abdulrahman Sumayli,
  • Jawaher Abdullah Alamoudi,
  • Arwa Sultan Alqahtani

摘要

In this study, we synthesized porous flower-like ZnFe2O4 (ZF) microspheres by a straightforward hydrothermal method. To enhance the accumulation of chemically adsorbed oxygen and modify the energy surface charge distribution, we employed a doping technique. Given that the ionic radius of Co2+ is closely comparable to that of Zn2+, Co2+ ions were selected as an appropriate dopant for ZF. We investigated the gas sensing properties of pure ZF and doped with 5 wt% (ZFC5) and 10 wt% cobalt (ZFC10) under varying concentrations (20–500 ppm) of ethylene glycol (EG) at optimal temperature, ambient pressure and relative humidity. All three ZF-based sensing layers exhibited selective sensing capabilities towards EG, with the highest response change observed for the ZFC10 to 100 ppm EG, which was 112% greater than that of acetone. The results show that with increasing cobalt doping, the gas sensor response is significantly enhanced, for example, at 500 ppm EG, the response improved from 107.52 for ZF to 147.74 for ZFC10, with a response time of less than 3 s. The porous structure, high specific surface area, and effective doping of the ZFC-based sensor materials show significant potential for gas vapor detection, especially for EG. The results show a significant 28% increase in sensor response compared to our previous work, as well as a reduction in recovery time from 140 s to 113 s.