Preparation of Spirogyra-derived biochar modified electrode and its application in nitrite detection

Jiang, Jianrong; Nie, Yanhong; Fozia, Fozia; Lin, Jialiang; Dai, Zhongming; Xu, Xu; Huang, Xiaoyan; Wang, Chaogang; Hu, Zhangli; Xu, Hòng

doi:10.1007/s13399-023-03801-0

Cited by 6 publications

(1 citation statement)

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“…The results reported from the previous literature on nitrite and paraxon ethyl, although used multiple materials based on glassy carbon electrodes, the LOD and linear range were not superior or like the A.AS-BioC/SPCE electrode properties were achieved through this work. A few papers that used BioC for the detection of nitrite such as in [47][48][49][50] use complicated methods such as microwave synthesis, and chemical activation by phosphoric acids for long durations at elevated temperatures to activate the material. This highlights the advantages of the electrochemical method proposed here in this paper for the activation without compromising on the sensing properties.…”

Section: Electrochemical Detection and Selectivity Studiesmentioning

confidence: 99%

Electrochemical Enrichment of Biocharcoal Modified on Carbon Electrodes for the Detection of Nitrite and Paraxon Ethyl Pesticide

Adiraju,

Brahem,

et al. 2024

J. Compos. Sci.

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Biocharcoal (BioC), a cost-effective, eco-friendly, and sustainable material can be derived from various organic sources including agricultural waste. However, to date, complex chemical treatments using harsh solvents or physical processes at elevated temperatures have been used to activate and enhance the functional groups of biochar. In this paper, we propose a novel easy and cost-effective activation method based on electrochemical cycling in buffer solutions to enhance the electrochemical performance of biocharcoal derived from almond shells (AS-BioC). The novel electrochemical activation method enhanced the functional groups and porosity on the surface of AS-BioC, as confirmed by microscopic, spectroscopic characterizations. Electrochemical characterization indicated an increase in the conductivity and surface area. A modified SPCE with activated AS-BioC (A.AS-BioC/SPCE), shows enhanced electrochemical performance towards oxidation and reduction of nitrite and paraxon ethyl pesticide, respectively. For both target analytes, the activated electrode demonstrates high electrocatalytic activity and achieves a very LOD of 0.38 µM for nitrite and 1.35 nM for ethyl paraxon with a broad linear range. The sensor was validated in real samples for both contaminants. Overall, the research demonstrates an innovative technique to improve the performance of AS-BioC to use as a modifier material for electrochemical sensors.

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Section: Electrochemical Detection and Selectivity Studiesmentioning

confidence: 99%