Scholarlink

<p>A novel chemiresistive sensing platform based on Cobalt-Ethylimidazolate Framework (CEF) deposited on indium tin oxide (ITO) substrate has been developed for ultrasensitive detection of perfluorooctanoic acid (PFOA). The CEF was synthesized via the stirring method using 2-ethyl imidazole as the organic linker and cobalt(II) nitrate hexahydrate as the metal precursor in an aqueous medium. The synthesized CEF was characterized using powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) to confirm its structural and morphological properties. Thin films of CEF were fabricated on ITO substrates using the drop-cast method, and the successful surface assembly was verified through PXRD, SEM, and spectroscopic techniques. The CEF-modified ITO electrode demonstrated excellent sensing performance towards PFOA in the 10–60&#xa0;ng/L concentration range. The sensing mechanism relies on the electrostatic interaction between PFOA and the CEF thin film, which induces measurable changes in circuit resistance. The developed sensor exhibited a detection limit of 1.6&#xa0;ng/L, significantly lower than the Environmental Protection Agency’s (EPA) prescribed limit of 70&#xa0;ng/L, demonstrating its potential for practical applications in PFOA monitoring.</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

Cobalt-ethylimidazolate framework thin films for selective PFOA detection via chemiresistive sensing

  • 期刊论文

  • 发表日期：

    2025年7月11日

查看全文
  • Gaurav Awasthi,
  • Pawan Kumar

摘要

A novel chemiresistive sensing platform based on Cobalt-Ethylimidazolate Framework (CEF) deposited on indium tin oxide (ITO) substrate has been developed for ultrasensitive detection of perfluorooctanoic acid (PFOA). The CEF was synthesized via the stirring method using 2-ethyl imidazole as the organic linker and cobalt(II) nitrate hexahydrate as the metal precursor in an aqueous medium. The synthesized CEF was characterized using powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM) to confirm its structural and morphological properties. Thin films of CEF were fabricated on ITO substrates using the drop-cast method, and the successful surface assembly was verified through PXRD, SEM, and spectroscopic techniques. The CEF-modified ITO electrode demonstrated excellent sensing performance towards PFOA in the 10–60 ng/L concentration range. The sensing mechanism relies on the electrostatic interaction between PFOA and the CEF thin film, which induces measurable changes in circuit resistance. The developed sensor exhibited a detection limit of 1.6 ng/L, significantly lower than the Environmental Protection Agency’s (EPA) prescribed limit of 70 ng/L, demonstrating its potential for practical applications in PFOA monitoring.