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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] [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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Ling C, Xu L, Ou L, Wu J, Tan C, Zhu L, Xiong X. NiCo-LDH coupled with 2D ZIF-derived Co nitrogen doped carbon nanosheet arrays as a self-supporting electrocatalyst for detection of formaldehyde. Chemistry 2024; 30:e202304024. [PMID: 38391394 DOI: 10.1002/chem.202304024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/29/2024] [Accepted: 02/16/2024] [Indexed: 02/24/2024]
Abstract
Formaldehyde is susceptible to illegal addition to foodstuffs to extend their shelf life due to its antimicrobial, preservative and bleaching properties. In this study, a self-supporting "nanosheet on nanosheet" arrays electrocatalyst with core-shell heterostructure was prepared in situ by coupling NiCo layer double hydroxide with 2D ZIF derived Co-nitrogen-doped porous carbon on carbon cloth (Co-N/C@NiCo-LDH NSAs/CC). Co-N/C nanosheet arrays act as a scaffold core with good electrical conductivity, providing more NiCo-LDH nucleation sites to avoid NiCo-LDH agglomeration, thus having fast mass/charge transfer performance. While the NiCo-LDH nanosheet arrays shell with high specific surface area provide more active sites for electrochemical reactions. As an electrocatalytic sensing electrode, Co-N/C@NiCo-LDH NSAs/CC has a wide linear range of 1 μM to 13 mM for formaldehyde detection, and the detection limit is 82 nM. Besides, the sensor has been applied to the detection of formaldehyde in food samples with satisfactory results.
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Affiliation(s)
- Chengshuang Ling
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu, 610068, China
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Li Xu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Lian Ou
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Jiaying Wu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Chao Tan
- Key Lab of Process Analysis and Control of Sichuan Universities, Yibin University, Yibin, 644000, China
| | - Liping Zhu
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu, 610068, China
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
| | - Xiaoli Xiong
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu, 610068, China
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China
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Ou L, Yang J, Xu L, Zhao S, Xiong X, Xiao T. Construction of Co-ZIF-derived CoS 2@Cu hollow heterogeneous nanotube array for the detection of hydrazine in environmental water samples. ENVIRONMENTAL RESEARCH 2024; 246:118177. [PMID: 38215926 DOI: 10.1016/j.envres.2024.118177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/14/2024]
Abstract
As a neurotoxin, it is necessary to establish a low cost, stable and sensitive method for the quantitative detection of hydrazine. Using Co-ZIF (zeolite imidazole framework) nanorods as precursor, CoS2 hollow nanotube array heterogeneous structure loaded with Cu nanoparticles were prepared on carbon cloth (CC) by etching, calcination and plasma magnetron sputtering (CoS2@Cu HNTA/CC). As a self-supporting electrode, its hollow heterogeneous structure provides a large area of electron transfer channel for the oxidation of the food pollutant hydrazine. In addition, bimetallic synergies and in situ N doping regulated the electronic structure of CoS2@Cu HNTA/CC, and thus significantly improved the electrical conductivity and catalytic activity. As an efficient hydrazine sensor with a wide linear range of 1 μM L-1-10 mM (1 μM-1 mM and 1 mM-10 mM), its sensitivity and the limit of detection are 7996 μA mM-1 cm-2, 3772 μA mM-1 cm-2 and 0.276 μM (S/N = 3), respectively. This study provides a new strategy for the construction of MOFs (Metal Organic Framework)-derived bimetallic composites and their application in electrochemical sensing.
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Affiliation(s)
- 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
| | - Jie Yang
- 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
| | - Li Xu
- 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
| | - Shan Zhao
- 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
| | - 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.
| | - Ting Xiao
- 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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