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Ag and N-doped carbon dot-enhanced H2O2–Co2+ chemiluminescence and its application for the determination of Co2+ and hydroquinone.
- Source :
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New Journal of Chemistry . 12/14/2023, Vol. 47 Issue 46, p21533-21539. 7p. - Publication Year :
- 2023
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Abstract
- In this study, Ag and N-doped carbon dots (Ag–NCDs) were used to enhance the ultraweak H2O2–Co2+ (a Fenton-like reaction) chemiluminescence (CL) reaction, in which Ag–NCDs were found to have the functions of catalyst, chelator, and luminophore. Under the co-catalysis of Co2+ and Ag–NCDs, H2O2 dissociation was facilitated, resulting in increased generation of active ˙OH and ˙O2− radicals. Thus, the CL intensity of the Ag–NCDs–H2O2–Co2+ system was significantly higher than that of the H2O2–Co2+ system and the Ag–NCDs–H2O2 system. Co2+ catalyzes the reaction through complex formation with Ag–NCDs' surface amino groups, thereby accelerating H2O2 decomposition. The CL intensity of the H2O2–Co2+ system increased with increasing Co2+ concentration in the range from 0.4 μM to 40.0 μM with a detection limit of 0.07 μM. Furthermore, we observed that HQ can effectively quench the Ag–NCDs–H2O2–Co2+ CL signal. This led to the application of the CL system for HQ detection, achieving quantitative measurements within the 0.2–20.0 μM concentration range with a detection limit of 0.04 μM. It also enabled sequential determination of Co2+ and HQ in egg yolk, vitamin B12, and water samples, offering simplicity, time-saving, and higher selectivity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 46
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173860924
- Full Text :
- https://doi.org/10.1039/d3nj04632j