Nickel Hydroxide with Structural Defects for Sensitive Detection of Pb(II) and Cd(II) Ions in Aqueous Media. Issue 14 (9th October 2019)

• Record Type: Journal Article
• Authors: Fan, Fenghui; Pan, Longhai; Raza miah, Mohammad; Sivagnanam, Bhuvanasundari; Thomas, Tiju; Shen, Hangjia; Yang, Minghui
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 14(2019)
• Page Start: B1330
• Page End: B1334
• Publication Date: 2019-10-09
• Subjects: Surface Science; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1141914jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The strong electrostatic interactions between the nickel ions and the hydroxy atoms in the vicinity of stacking faults could contribute to the improvement of electrochemical activity. In this work, β-Ni(OH)2 of ∼5 nm crystallite size and an abundance of stacking faults have been prepared via a rather simple chemical precipitation method. The sensor, based on β-Ni(OH)2 modified glassy carbon electrode is employed to determine the trace level of Pb(II) and Cd(II). A high detection sensitivity is achieved for Pb(II) of 22. 29 AM −1 and Cd(II) of 14.05 AM −1, with a limit of detection of ∼0.6 nM and ∼0.9 nM, respectively. The fabricated sensor has been successfully used to analyze Pb(II) and Cd(II) in river water. The results are comparable to the ones obtained using ICP-MS, indicating the accuracy of the measurements from the modified electrode.