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Title: | Design and synthesis of hierarchical MnO-Fe3O4@C/expanded graphite composite for sensitive electrochemical detection of bisphenol A | Authors: | Zhao, Yao Zhang, Shu Yao, Wang Zhu, Yuxuan Qian, Jing Yang , Juan YANG, Nianjun |
Issue Date: | 2024 | Publisher: | ELSEVIER | Source: | TALANTA, 269 (Art N° 125453) | Abstract: | Hierarchically nanostructured binary transition metal oxide-based materials with high conductivity and catalytic activity are quite attractive for the electrochemical quantitative detection of environmental pollutants due to their natural abundance, variable oxidation state, and excellent synergies between metal sites. Herein, a new hierarchical MnO-Fe3O4@C/expanded graphite (EG) composite is designed and synthesized through a simple and in situ annealing method with the utilization of bimetallic organic framework (FeMn-MOF)/EG precursor. The synthesized MnO-Fe3O4@C/EG composite possesses a unique hierarchical nanoarchitecture that small-sized bimetallic oxide nanoparticles of 10-40 nm completely encapsulated by amorphous carbon layers of 2-4 nm are uniformly distributed on the EG platform. This distinctive structure combines the advantages of high conduc-tivity, excellent catalytic activity, and strong stability. Resultantly, when it is applied to monitor environmental endocrine disruptors, the sensor exhibits a significant catalytic effect on the electrochemical oxidation of bisphenol A (BPA), inducing an amplified response current. In addition, the sensor shows a wide linear range of 1-50 mu M and 50-400 mu M for the BPA monitor, giving a sensitivity of 5208.8 and 1641.9 mu A mM-1 cm-2, respectively. This study offers a new approach to design hierarchical binary metal oxide-based sensing materials as well as to explore their electrochemical properties and applications for the determination of emerging contaminants. | Notes: | Yang, J (corresponding author), Wuhan Inst Technol, Sch Chem & Environm Engn, Key Lab Green Chem Proc Minist Educ, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430073, Peoples R China. jyangchem@wit.edu.cn |
Keywords: | Transition metal oxide;Expanded graphite;Electrochemical sensor;Bisphenol A | Document URI: | http://hdl.handle.net/1942/42057 | ISSN: | 0039-9140 | e-ISSN: | 1873-3573 | DOI: | 10.1016/j.talanta.2023.125453 | ISI #: | 001126954500001 | Rights: | 2023 Elsevier B.V. All rights reserved. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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Design and synthesis of hierarchical MnO–Fe3O4@CA.pdf Restricted Access | Published version | 14.32 MB | Adobe PDF | View/Open Request a copy |
Pc8gUQ0e9SWGAELdGg-i8GR69eyom_skG.pdf | Peer-reviewed author version | 4.89 MB | Adobe PDF | View/Open |
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