A novel electrochemical sensor based on Ag nanoparticles decorated multi-walled carbon nanotubes for applied determination of nitrite. (March 2017)

• Record Type: Journal Article
• Authors: Wan, Yue; Zheng, Yi Fan; Wan, Hua Tao; Yin, Hao Yong; Song, Xu Chun
• Is Part Of: Food control. Volume 73:Part B(2017)
• Page Start: 1507
• Page End: 1513
• Publication Date: 2017-03
• Subjects: AgNPs -- MWCNTs -- Nitrite -- Determination; Food -- Quality -- Periodicals; Food -- Analysis -- Periodicals; Food handling -- Periodicals; Food industry and trade -- Quality control -- Periodicals; Aliments -- Industrie et commerce -- Qualité -- Contrôle -- Périodiques; Aliments -- Qualité -- Périodiques; Aliments -- Analyse -- Périodiques; Hygiène alimentaire -- Périodiques; Food -- Analysis; Food handling; Food -- Quality; Periodicals; Electronic journals; 664.07
• DOI: 10.1016/j.foodcont.2016.11.014
• Languages: English
• ISSNs: 0956-7135

Abstract

Abstract: Ag nanoparticles decorated multi-walled carbon nanotubes (MWCNTs) composite was prepared by a simple electrochemical deposition approach. Transmission electron microscopy (TEM) and Energy dispersive spectroscopy (EDS) were employed to characterize the morphology and composition of the composite. The results showed that Ag nanoparticles with an average size approximately 20 nm were uniformly deposited on the MWCNTs surface. The electrochemical performance of the suggested sensor was investigated via differential pulse voltammetry (DPV) and chronoamperometry. Under optimum conditions, the AgNPs/MWCNTs/GCE displayed a rapid current response to nitrite, with the anodic peak current varying linearly with nitrite concentration in the range of 1 μM–100 μM ( R = 0.9989) accompanying a low detection limit of 0.095 μM. The long-term stability and good reproducibility were also achieved on the proposed sensor. The determination of nitrite in tap water was studied and showed desirable recovery rate, signifying its possibility for practical application. Highlights: The determination of nitrite has been achieved using Ag nanoparticles decorated MWCNTs. The proposed sensor exhibits low detection limit, wide linear range and high reproducibility. The sensor was successfully applied to the analysis of nitrite in tap water.