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Ultra-trace detection of toxic heavy metal ions using graphitic carbon functionalized Co3O4 modified screen-printed electrode
Carbon Letters ( IF 5.5 ) Pub Date : 2021-07-06 , DOI: 10.1007/s42823-021-00265-y
R. T. Yogeeshwari 1, 2 , R. Hari Krishna 1 , Prashanth S. Adarakatti 3 , S. Ashoka 4
Affiliation  

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.



中文翻译:

使用石墨碳功能化 Co3O4 修饰的丝网印刷电极超痕量检测有毒重金属离子

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。

更新日期:2021-07-06
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