Ultrasonic synthesis of bismuth-organic framework intercalated carbon nanofibers: A dual electrocatalyst for trace-level monitoring of nitro hazards
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2023-04-11
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ArticleDate
2021-04-02Online Publication Date
2021-04-02Print Publication Date
2021-06Embargo End Date
2023-04-11Submitted Date
2020-09-26Permanent link to this record
http://hdl.handle.net/10754/668959
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Environmental nitro hazards (NO2− and NO) are important contaminants in food and aquatic environments. Consumption of excessive nitro hazards can trigger a bio-oxidation reaction between hemoglobin (Fe2+) and methemoglobin (Fe3+) through an irreversible mechanism and restrict oxygen transport, which can lead to death. Therefore, the quantitative determination of nitro hazards is essential. The present study describes the quantitative determination of NO2− and NO using Bi-MOF intercalated carbon nanofibers (CNFs). The CNFs-Bi-MOF nanocomposite was prepared by a simple and effective ultrasonic synthetic route. The synthesized nanocomposite was evaluated using various spectral and microscopic techniques. FE-SEM and TEM results revealed the biphenyl-4,4′-dicarboxylic acid MOF (Bi-MOF) with an irregular rod-like structure. The composite showed intensely incorporated Bi-MOF with CNFs. The XPS result strongly confirmed that the oxidation state of the framework metal site was Bi3+. The composite modified on the GCE and then used for electrocatalytic oxidation of NO2− and NO. The CNFs-Bi-MOF/GCE exhibited excellent electrocatalytic activity with minimized overpotential for the oxidation of NO2− and NO. The CNFs-Bi-MOF/GCE displayed a wide linear range from 2 nM – 2 mM and 10 nM – 1 mM with LODs of 0.184 nM and 3.463 nM for NO2− and NO, respectively. Finally, the method was used in environmental effluent and tap water samples for the quantitative determination of nitro hazards.Citation
Arul, P., Huang, S.-T., Mani, V., & Hu, Y.-C. (2021). Ultrasonic synthesis of bismuth-organic framework intercalated carbon nanofibers: A dual electrocatalyst for trace-level monitoring of nitro hazards. Electrochimica Acta, 381, 138280. doi:10.1016/j.electacta.2021.138280Sponsors
The authors are grateful for the financial support from the Ministry of Science and Technology, Taiwan (MOST-107-2113-M-027-006 and MOST-108-2113-M-027-001). P. Arul would like to gratitude National Taipei University of Technology for the Post-doctoral fellowship.Publisher
Elsevier BVJournal
Electrochimica ActaAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S0013468621005703ae974a485f413a2113503eed53cd6c53
10.1016/j.electacta.2021.138280