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Jin Y, Yuan X, Ou L, Wu J, Hu J, Xue K, Xiong X. In situ fast self-assembled preparation of dandelion-like Cu(OH) 2@Cu 3(HHTP) 2 with core-shell heterostructure arrays for electrochemical sensing of formaldehyde in food samples. Food Chem 2024; 447:139013. [PMID: 38507950 DOI: 10.1016/j.foodchem.2024.139013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 02/05/2024] [Accepted: 03/10/2024] [Indexed: 03/22/2024]
Abstract
Formaldehyde is known to harm the respiratory, nervous, and digestive systems of people. In this paper, a novel dandelion-like electrocatalyst with core-shell heterostructure arrays were fast self-assembled prepared in situ using copper foam (CF) as support substrate and 2,3,6,7,10,11 hexahydroxy-triphenyl (HHTP) as ligand (Cu(OH)2@Cu3(HHTP)2/CF) by a simple two-step hydrothermal reaction. The 1D Cu(OH)2 nanorods "core" and the 2D π-conjugated conducting metal-organic frameworks (Cu3(HHTP)2cMOF) "shell" with remote delocalized electrons give the dandelion-like heterogeneous catalysts excellent electrochemical activity such as a large specific surface area, high conductivity and a fast electron transfer rate. The Cu(OH)2@Cu3(HHTP)2/CF exhibited excellent electrocatalytic performance for formaldehyde under alkaline conditions with a linear range of 0.2 μmol/L - 125 μmol/L and 125 μmol/L - 8 mmol/L, a detection limit as low as 15.9 nmol/L (S/N = 3), as well as good accuracy, consistency, and durability, and it effectively identified FA in food.
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Affiliation(s)
- Yao Jin
- College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Xiangwei Yuan
- College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Lian Ou
- College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Jiaying Wu
- College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China
| | - Jiangtao Hu
- Technology Center of Chengdu Customs, Chengdu 610041, Sichuan, China; Food Safety Detection Key Laboratory of Sichuan Province, Chengdu 610041, Sichuan, China
| | - Kang Xue
- Technology Center of Chengdu Customs, Chengdu 610041, Sichuan, China; Food Safety Detection Key Laboratory of Sichuan Province, Chengdu 610041, Sichuan, China.
| | - Xiaoli Xiong
- College of Chemistry and Material Science, Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education), Sichuan Normal University, Chengdu, Sichuan 610068, China.
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