title: Immobilized organoruthenium(II) complexes onto polyethyleneimine-wrapped carbon nanotubes/in situ formed gold nanoparticles as a novel electrochemical sensing platform.
abstract: The polyethyleneimine (PEI) wrapped multi-walled carbon nanotubes functionalized with a carboxylic acid group (CNTs-COOH) gold nanoparticle (AuNP)-modified gold (Au) electrode has been utilized as a platform to immobilize organoruthenium(II) complexes (ORC). The surface structure and composition of the sensor were characterized by scanning electron microscopy (SEM). Electrocatalytic reduction of iodate and nitrite on the surface of modified electrode was investigated with cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and hydrodynamic voltammetry methods. The cyclic voltammetric results indicated the ability of AuNPs/PEI/CNT-COOH/ORC modified Au electrode to catalyze the reduction of this compound. AuNPs/PEI/CNTs-COOH nanocomposite combined the advantages of PEI-well dispersed CNTs-COOH and in situ formed AuNPs.
authors.affiliation: Department of Chemistry, Faculty of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran. Electronic address: Azadbakht.a@gmail.com.
authors.forename: Azadeh
authors.initials: A
authors.lastname: Azadbakht
authors.affiliation: Department of Chemistry, Faculty of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.
authors.forename: Amir Reza
authors.initials: AR
authors.lastname: Abbasi
authors.affiliation: Department of Chemistry, Faculty of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.
authors.forename: Zohreh
authors.initials: Z
authors.lastname: Derikvand
authors.affiliation: Department of Chemistry, Faculty of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.
authors.forename: Shiba
authors.initials: S
authors.lastname: Amraei
mesh_terms: D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D006046:Gold / Q000737:chemistry; D007452:Iodates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D009573:Nitrites / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry; D010084:Oxidation-Reduction; D011094:Polyethyleneimine / Q000737:chemistry*; D015203:Reproducibility of Results; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D007452:Iodates; D037742:Nanotubes, Carbon; D009573:Nitrites; D009942:Organometallic Compounds; D006046:Gold; D012428:Ruthenium; D011094:Polyethyleneimine
keywords: Electrocatalytic reduction; Gold nanoparticles; Iodate; Nitrite; Polyethyleneimine