H2O2-assisted detection of melamine using fluorescent probe based on corn cob carbon dots-Ionic Liquid-Silver nanoparticles.
H2O2-assisted detection of melamine using fluorescent probe based on corn cob carbon dots-Ionic Liquid-Silver nanoparticles.
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DOI：
10.1016/j.foodchem.2022.134415
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发表时间：
2022-09
期刊：
影响因子：
8.8
通讯作者：
Yuxin Zheng;Jiawei Hao;Kamile Arkin;Yuyang Bei;Xuesong Ma;Q. Shang;Weilong Che
中科院分区：
文献类型：
--
作者：
Yuxin Zheng;Jiawei Hao;Kamile Arkin;Yuyang Bei;Xuesong Ma;Q. Shang;Weilong Che
在这项工作中，开发了一种新的可持续的三聚氰胺检测方法。以农业废弃物玉米芯为碳源，采用离子液体（1-烯丙基-3-甲基咪唑氯化物，IL）水热法成功制备了生物质碳量子点（CD），并与银纳米粒子（AgNPs）复合，构建了生物质碳量子点荧光探针CD @IL-AgNPs。对探针进行了表征，并对探针的形成机理进行了探讨。实现了H2 O2的直接检测和三聚氰胺的间接灵敏检测。三聚氰胺的检出限为0.94 μmol/L，远低于奶粉中三聚氰胺的最低允许量（7.95 μmol/L）。将该高灵敏度、高选择性探针用于市售乳制品中三聚氰胺的检测，标准加入回收率在94%~ 110%之间。该研究为乳制品中三聚氰胺的检测和农业废弃物的低碳环保处理提供了有价值的新的应用思路。
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 H2O2and 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.