Prepared Reticulated Nickel Hydroxide for Sensing Urea by Differential Pulse Voltammetry.

Title Prepared Reticulated Nickel Hydroxide for Sensing Urea by Differential Pulse Voltammetry.
Authors H.N. Luk; C.M. Wang; H.Y. Peng; R.J. Wu
Journal J Nanosci Nanotechnol
DOI 10.1166/jnn.2018.15322
Abstract

A urea sensor base on reticulated nickel hydroxide is prepared by hydrothermal way and operated by differential pulse voltammetry method. The reticulated nickel hydroxide has been successfully synthesized by a hydrothermal method and has been characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). The Ni(OH)2 sensor exhibits a higher sensor response (S) of 7.1 than NiO and Au sensing materials to 0.05 M urea concentration at 0.62 V. Various concentration of urea from 0.1 mM to 50 mM are performed on Ni(OH)2, and the sensor response are increased from 1.1 to 7.1 by differential pulse voltammetry (DPV) method. The urea detection limit is measured as 0.1 ?M in this system. In addition, the Ni(OH)2 sensor exhibited good reproducibility and short term stability, and the response exhibits no obvious changes after 20 days tests. A possible sensing mechanism of Ni(OH)2 urea sensor is presented.

Citation H.N. Luk; C.M. Wang; H.Y. Peng; R.J. Wu.Prepared Reticulated Nickel Hydroxide for Sensing Urea by Differential Pulse Voltammetry.. J Nanosci Nanotechnol. 2018;18(7):47284733. doi:10.1166/jnn.2018.15322

Related Elements

Nickel

See more Nickel products. Nickel (atomic symbol: Ni, atomic number: 28) is a Block D, Group 4, Period 4 element with an atomic weight of 58.6934. Nickel Bohr ModelThe number of electrons in each of nickel's shells is [2, 8, 16, 2] and its electron configuration is [Ar]3d8 4s2. Nickel was first discovered by Alex Constedt in 1751. The nickel atom has a radius of 124 pm and a Van der Waals radius of 184 pm. In its elemental form, nickel has a lustrous metallic silver appearance. Nickel is a hard and ductile transition metal that is considered corrosion-resistant because of its slow rate of oxidation. Elemental NickelIt is one of four elements that are ferromagnetic and is used in the production of various type of magnets for commercial use. Nickel is sometimes found free in nature but is more commonly found in ores. The bulk of mined nickel comes from laterite and magmatic sulfide ores. The name originates from the German word kupfernickel, which means "false copper" from the illusory copper color of the ore.

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