Colloids and Surfaces A 538 (2018) 371–377 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Solvothermal synthesis of Ag@Fe O nanosphere and its application as 3 4 hydrazine sensor Yuhua Dong, Ziyin Yang, Qinglin Sheng, Jianbin Zheng Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi’an, Shaanxi 710069, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: In this paper, Ag@Fe O nanospheres were prepared by a simple solvothermal approach. Scanning electron 3 4 Electrocatalysis microscope (SEM), transmission electron microscope (TEM), X-ray diﬀraction (XRD) and energy dispersive X-ray Core/shell nanosphere spectroscopy (EDX) were used to study the morphology and structure of Ag@Fe O .By ﬁxing Ag@Fe O core/ 3 4 3 4 Ag@Fe O 3 4 shell nanospheres on glassy carbon electrode, a novel non-enzymatic hydrazine sensor was fabricated to catalyze Hydrazine the oxidation of hydrazine. Electrochemical investigations suggested that the sensor had a wonderful electro- catalytic activity for hydrazine oxidation. The catalytic current was linear with the concentration of hydrazine from 0.25 μM to 3.4 mM (R = 0.9984). The detection limit of the sensor was 0.06 μM with a signal-to-noise ratio −1 −2 (S/N) of 3. The
Geoderma – Elsevier
Published: Feb 15, 2019
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