Herein, a new and generic strategy has been proposed to introduce uniformly distributed graphitic carbon into the nanostructured metal oxide. A facile and generic synthetic protocol has been proposed to introduce uniformly distributed conducting graphitic carbon into the Co₃O₄ nanoparticles (Co₃O₄ NPs@graphitic carbon). The prepared Co₃O₄ NPs@graphitic carbon has been drop casted onto the portable screen-printed electrode (SPE) to realize its potential application in the individual and simultaneous quantification of toxic Pb(II) and Cd(II) ions present in aqueous solution. The proposed Co₃O₄ NPs@graphitic carbon-based electrochemical sensor exhibits a wide linear range from 0 to 120 ppb with limit of detection of 3.2 and 3.5 ppb towards the simultaneous detection of Pb(II) and Cd(II), which falls well below threshold limit prescribed by WHO.

在此，提出了一种新的通用策略，将均匀分布的石墨碳引入纳米结构的金属氧化物中。已经提出了一种简便且通用的合成方案，以将均匀分布的导电石墨碳引入 Co ₃ O ₄纳米颗粒（Co ₃ O ₄ NPs@graphitic carbon）。制备的 Co ₃ O ₄ NPs@石墨碳已滴铸到便携式丝网印刷电极 (SPE) 上，以实现其在单独和同时定量水中存在的有毒 Pb(II) 和 Cd(II) 离子的潜在应用。解决方案。提议的 Co ₃ O ₄ NPs@graphitic 碳基电化学传感器表现出从 0 到 120 ppb 的宽线性范围，检测限为 3.2 和 3.5 ppb，同时检测 Pb(II) 和 Cd(II)，其远低于规定的阈值限制WHO。