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Issue 7, 2018
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Facile synthesis of microporous sulfur-doped carbon spheres as electrodes for ultrasensitive detection of ascorbic acid in food and pharmaceutical products

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Abstract

Fabrication of electrodes based on a metal-free catalyst with desirable sensitivity, selectivity, and stability has been given considerable interest. Microporous sulfur-doped carbon microspheres (S-MCMS) were synthesized and assembled as an electrochemical sensor for the monitoring of ascorbic acid (AA) in commercial juices and vitamin C tablets. The S-doped microporous carbon with a spherical structure was fabricated at different annealing temperatures (700, 800, and 900 °C) to achieve a high surface area, an actively doped carbon interfacial surface, soft interactive surfaces and an open microporous network. The high surface area, actively doped S-atom percentage, microporous construction, and active doping of the carbon microsphere construction of S-MCMS-900, make it a highly stable metal-free electrocatalyst for selective detection of AA. The S-atoms incorporated with the sp2-carbon matrix form numerous active sites, which bind to targets and stimulate the transduction of the electrochemical interaction with a fast response and high charge transfer efficiency. Selective monitoring of AA on S-MCMS-900 with high sensitivity was achieved with a detection limit as low as 1 μM, and wide linear range up to 4 mM. Monitoring of AA in lemon juice or pharmaceutical tablets was realized by using S-MCMS-900, with a fast response, high sensitivity, reliable selectivity, high stability and rational reproducibility. S-MCMS-900 can be employed as a fast, sensitive, and selective assay for routine detection of AA in food, biological, and environmental samples.

Graphical abstract: Facile synthesis of microporous sulfur-doped carbon spheres as electrodes for ultrasensitive detection of ascorbic acid in food and pharmaceutical products

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Publication details

The article was received on 20 Dec 2017, accepted on 22 Feb 2018 and first published on 23 Feb 2018


Article type: Paper
DOI: 10.1039/C7NJ05047J
Citation: New J. Chem., 2018,42, 5037-5044
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    Facile synthesis of microporous sulfur-doped carbon spheres as electrodes for ultrasensitive detection of ascorbic acid in food and pharmaceutical products

    M. Y. Emran, M. A. Shenashen, A. A. Abdelwahab, M. Abdelmottaleb and S. A. El-Safty, New J. Chem., 2018, 42, 5037
    DOI: 10.1039/C7NJ05047J

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