Journal
FOODS
Volume 11, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/foods11101487
Keywords
electrochemiluminescence; MOFs; detection; Eu3+; carbaryl
Categories
Funding
- National Key Research and Development Program of China [2017YFC1600803]
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In this study, a Eu3+-MOF-253@Au electrochemiluminescence sensor was successfully constructed for the sensitive detection of carbaryl. Nanogold was encapsulated in the metal-organic frameworks (MOFs) backbone and Eu3+ was assembled on the MOF backbone to enhance the catalytic performance and confer electrochemiluminescence properties. The sensor showed good linearity and a low detection limit for carbaryl.
In this work, an Eu3+-MOF-253@Au electrochemiluminescence sensor was successfully constructed for the first time by encapsulating nanogold in the metal-organic frameworks (MOFs) backbone and pore channels, and assembling Eu3+ on the MOF backbone. Firstly, the introduction of nanogold overcomes the weakness of MOFs, which was difficult to achieve, and enhances its catalytic performance, followed by the modification of Eu3+ to confer the electrochemiluminescence performance and the function of target detection on the sensor. Moreover, carbaryl was placed in an alkaline working solution to enhance the intensity of electrochemiluminescence signal, as well as to promote the hydrolysis of carbaryl into 1-naphthol, which caused the burst of Eu3+-MOF-253@Au electrochemiluminescence sensor, thereby achieving the sensitive detection of carbaryl. On this basis, the electrochemiluminescence detection conditions were optimized, the performance was analyzed, and finally it was successfully used for the detection of carbaryl with good linearity in the range of 0.2-200 mu g L-1 and a low detection limit (0.14 mu g L-1).
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