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<p> A&#xa0;facile method&#xa0;is reported for rapid etching of cobalt Prussian blue analogues (Co PBA) with inorganic salt NaClO at room temperature, resulting in Co PBA<sub>NaClO</sub>, which has been successfully applied to sensitive chemiluminescence (CL) detection. Initially, Co PBA was synthesized using the classical coprecipitation method. Subsequently, without the need for additional steps, Co PBA<sub>NaClO</sub> was obtained by simply mixing NaClO with Co PBA at room temperature. This fabrication process led to the formation of numerous Co nanoparticles on the surface of Co PBA, thereby exposing more active sites. Based on the exceptional peroxidase-mimicking activity exhibited by Co PBA<sub>NaClO</sub>, we constructed the Co PBA<sub>NaClO</sub>-luminol-H<sub>2</sub>O<sub>2</sub> CL platform and successfully utilized it for the sensitive detection of both H<sub>2</sub>O<sub>2</sub> and glucose, with detection ranges of 0.05–20&#xa0;µM and 1–50&#xa0;µM, respectively, and detection limits of 23&#xa0;nM and 36&#xa0;nM, respectively. Finally, the possible mechanism of the Co PBA<sub>NaClO</sub>-luminol-H<sub>2</sub>O<sub>2</sub> system was investigated. This work demonstrates the feasibility of etching PBAs with inorganic salts to enhance their peroxidase-like activity and expands the application of etched PBAs in the area of CL sensing.</p> Graphical abstract <p></p>

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Sensitive chemiluminescence detection platform for H2O2 and glucose through facile inorganic salt etching of cobalt Prussian blue analogues

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Yun He,
  • Yipi Xiao,
  • Xixi Ma,
  • Kangyi Guo,
  • Liang Guo,
  • Aiping Fan,
  • Xiangjuan Zheng,
  • Fanrong Ai,
  • Xiluan Yan

摘要

A facile method is reported for rapid etching of cobalt Prussian blue analogues (Co PBA) with inorganic salt NaClO at room temperature, resulting in Co PBANaClO, which has been successfully applied to sensitive chemiluminescence (CL) detection. Initially, Co PBA was synthesized using the classical coprecipitation method. Subsequently, without the need for additional steps, Co PBANaClO was obtained by simply mixing NaClO with Co PBA at room temperature. This fabrication process led to the formation of numerous Co nanoparticles on the surface of Co PBA, thereby exposing more active sites. Based on the exceptional peroxidase-mimicking activity exhibited by Co PBANaClO, we constructed the Co PBANaClO-luminol-H2O2 CL platform and successfully utilized it for the sensitive detection of both H2O2 and glucose, with detection ranges of 0.05–20 µM and 1–50 µM, respectively, and detection limits of 23 nM and 36 nM, respectively. Finally, the possible mechanism of the Co PBANaClO-luminol-H2O2 system was investigated. This work demonstrates the feasibility of etching PBAs with inorganic salts to enhance their peroxidase-like activity and expands the application of etched PBAs in the area of CL sensing.

Graphical abstract