Novel urchin-like FeCo oxide nanostructures supported carbon spheres as a highly sensitive sensor for hydrazine sensing application

• Published in: Journal of pharmaceutical and biomedical analysis Vol. 172; pp. 243 - 252
• Main Authors: Nguyen, D.M., Bach, L.G., Bui, Q.B.
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 05.08.2019
• Subjects: Biosensor; Carbon - chemistry; Carbon spheres; Carbonates - chemistry; Cobalt - chemistry; Electrocatalyst; Electrochemical Techniques - methods; Electrodes; Ferric Compounds - chemistry; Hydrazine detection; Hydrazines - chemistry; Hydroxides - chemistry; Iron cobalt oxide; Limit of Detection; Metal Nanoparticles - chemistry; Nanostructures - chemistry; Oxidation-Reduction; Oxides - chemistry; Urchin-like nanostructure; Carbon spheres; Iron cobalt oxide; Electrocatalyst; Hydrazine detection; Urchin-like nanostructure; Biosensor
• ISSN: 0731-7085; 1873-264X
• DOI: 10.1016/j.jpba.2019.04.008

[Display omitted] •A novel hybrid of urchin-like FeCo oxide supported carbon spheres was developed.•The hybrid excellently detected hydrazine with wide detection range (0.1–516.6 μM) and low detection limit (0.1 μM).•The hybrid displayed fast response, good reproducibility and stability•The hybrid accurately determined hydrazine in real river water sample. Herein, we successfully fabricated a novel nanostructure based on hierarchical urchin-like FeCo oxide supported carbon spheres (FeCo Oxide/CSs) via a two-step hydrothermal method followed by a simple annealing step at 300 °C under air. It was found that such urchin-like FeCo Oxide/CSs structure exhibited superior catalytic activity towards hydrazine oxidation to CSs, Fe Oxide/CSs, Co Oxide/CSs, and FeCo Hydroxide/CSs material. In this regard, the FeCo Oxide/CSs displayed a wide linear detection range of 0.1–516.6 μM, low detection limit of 0.1 μM, and long-term stability. The material also showed good selectivity towards hydrazine detection in the presence of various interferences, such as uric acid, ascorbic acid, urea, dopamine, Na+, SO42−, K+, and Cl-. The excellent sensing performance of the FeCo Oxide/CSs was assumed to the unique hierarchical urchin structure with the high density and uniformity of nano-sized FeCo Oxide nanoneedles, which produced massive electroactive sites and enhanced charge transfer ability. The achieved results implied that the FeCo Oxide/CSs may be a great candidate for sensitive hydrazine detection.