Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 10, Pages 15875-15884Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c04099
Keywords
quantum dots; iron(II); hydroxyl radicals; fluorometric; colorimetric
Funding
- National Natural Science Foundation of China
- Natural Science Foundation of Shandong Province
- Outstanding Youth Fund of Heilongjiang Province
- Student Research and Innovation Fund of the Fundamental Research Funds for the Central Universities
- [NSFC 52002096]
- [52002091]
- [51972075]
- [ZR2020ZD42]
- [YQ2019E016]
- [3072022JIP1001]
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In this study, a multifunctional C-CdTeQDs probe was established for the rapid and successive determination of H2O2 and Fe2+ in serum. The double-emission fluorescence detection and colorimetric method were utilized for detection, based on the Fenton reaction and complexation reaction. The C-CdTeQDs probe showed versatility, convenience, high selectivity, and sensitivity, making it a potential tool for the determination of H2O2 and Fe2+ in serum.
The Fenton reaction has been widely utilized in tumor therapy and ferroptosis immunity in recent years. Therefore, the detection of hydrogen peroxide (H2O2), hydroxyl radicals (center dot OH), and iron(II) (Fe2+) in serum is urgently in need. A multifunctional combined carbon-CdTe quantum dots (C-CdTeQDs) probe is first established for the quick succession determination of H2O2 and Fe2+ in goat serum and human urine based on the fluorescence and colorimetric method. The double-emission fluorescence detection is performed by breaking the thioglycolic acid bond on the surface of CdTeQDs by H2O2 to quench the fluorescence at 594 nm. After the condition optimization, the fluorescence intensity is linearly related to H2O2 concentration, with a limit of detection of 58 nM. The colorimetric detection of center dot OH and Fe2+ concentrations is then continued by the Fenton reaction and the complexation reaction. Among them, the detection range of center dot OH is 0.01-0.1 mu M with the limit of detection of 8 nM. Several advantages such as versatility, convenience, high selectivity, and sensitivity of the C-CdTeQDs probe indicated that it has great potential for the determination of H2O2 and Fe2+ in serum.
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