H2O2-assisted detection of melamine using fluorescent probe based on corn cob carbon dots-Ionic Liquid-Silver Nanoparticles
2022
Zheng, Yuexin | Hao, Jiawei | Arkin, Kamile | Bei, Yuyang | Ma, Xuesong | Shang, Qingkun | Che, Weilong
In this work, a new sustainable melamine detection method was developed. Biomass-derived carbon dots (CDs) were successfully prepared by ionic liquid (1-Allyl-3-methylimidazolium chloride, IL) hydrothermal method using agricultural waste corn cob as the carbon source, and combined with silver nanoparticles (AgNPs) to construct fluorescent probe CDs@IL-AgNPs. The probe was characterized and the formation mechanism of the probe was discussed. The direct detection of H₂O₂ and the indirect sensitive detection of melamine were realized. The detection limit of melamine was 0.94 μmol/L, which is far lower than the minimum allowable amount of melamine in milk powder (7.95 μmol/L). The high sensitivity and selectivity probe was used to detect melamine in commercial dairy products, and the recovery rate of standard addition was between 94% and 110%. This study provides valuable new application ideas for the detection of melamine in dairy products and the low-carbon and environmentally friendly treatment of agricultural waste.
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