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

Emran, Mohammed Y., Shenashen, Mohamed A., Abdelwahab, Adel A., Abdelmottaleb, Mohamed and El-Safty, Sherif-A (2018) Facile synthesis of microporous sulfur-doped carbon spheres as electrodes for ultrasensitive detection of ascorbic acid in food and pharmaceutical products. New Journal of Chemistry, 42 (7). pp. 5037-5044. ISSN 1369-9261

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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.

Item Type: Article
Additional Information: ** From Crossref via Jisc Publications Router. ** Licence for AM version of this article starting on 23-02-2019: http://rsc.li/journals-terms-of-use
Uncontrolled Keywords: Materials Chemistry, General Chemistry, Catalysis
Divisions: Faculty of Technology > School of Engineering
SWORD Depositor: Publication Router
Depositing User: Publication Router
Date Deposited: 26 May 2020 17:58
Last Modified: 26 May 2020 17:58
URI: http://sure.sunderland.ac.uk/id/eprint/9067
ORCID for Mohammed Y. Emran: ORCID iD orcid.org/0000-0002-0605-7118
ORCID for Mohamed A. Shenashen: ORCID iD orcid.org/0000-0003-1592-5877
ORCID for Sherif-A El-Safty: ORCID iD orcid.org/0000-0001-5992-9744

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