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An Innovative Electrochemical Sensor Ground on NiO Nanoparticles and Multi-Walled Carbon Nanotubes for Quantitative Determination of Nitrite

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An electrochemical sensor ground on nickel oxide (NiO) nanoparticles and multi-walled carbon nanotubes (MWCNTs) was exploited for the detection of nitrite. Scanning electron microscopy (SEM) ensure the morphology of the nanocomposite consisted of NiO nanoparticle and MWCNTs. High Resolution Transmission electron microscopy (HR-TEM) reveals that the structure of NiO nanoparticles and MWCNTs. Scanning transmission electron microscopy (STEM) persuasively verified presence of the C, Ni and O element. The electrochemical character of the nanocomposite were researched by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), and the behavior of electrochemical oxidation to nitrite on NiO/MWCNTs/CP was explored by chronoamperometry. In tests, the NiO/MWCNTs/CP shown a sensitive current response toward nitrite, the oxidation peak current are linearly related to nitrite concentration in the range from 10−6 M to 10−4 M (R = 0.997) with a sensitivity of 3.53 μA μM−1 and a detection limit of 0.25 μM (S/N = 3). The validity of utilizing the proposed electrode to determine nitrite in tap water was also demonstrated.
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Keywords: Electrochemical Determination; MWCNTs; NiO; Nitrite

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Fujian Normal University, Fuzhou, 350007, P. R. China 2: Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou, 310014, P. R. China 3: Yangxin Radio and Tv University, Yangxin, 435200, P. R. China

Publication date: May 1, 2018

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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