Synthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method

Muneer M. Ba-Abbad, Mohd Sobri Takriff, Abdelbaki Benamor, Abdul Wahab Mohammad

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The properties of ZnO nanoparticles were modified by doping them with cobalt ions (Co2+) in various compositions through a sol-gel route. The Co2+-doped ZnO nanoparticles were characterised using X-ray diffraction (XRD), UV/Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and zeta potential measurements. A hexagonal wurtzite-phase structure of Co2+-doped ZnO was observed, with a slight decrease in particle size as the Co2+ doping concentration increased. Absorption by Co2+-doped ZnO was found to shift to longer wavelengths, towards the visible region, which was also confirmed by photoluminescence analysis. The band gap of the Co2+-doped ZnO samples decreased from 3.19 to 2.66 eV as the content of dopant Co2+ increased from 0.0 to 1.0 wt.%. The zeta potential results showed slight effects of Co2+ doping compared with undoped ZnO, indicating that Co2+ doping influences the optical properties and morphology of pure ZnO nanoparticles. The photocatalytic activity of the Co2+-doped ZnO samples was evaluated for the removal of Congo red dye from aqueous solution under solar radiation. The Co2+-doped ZnO samples showed higher effective removal of the dye using the optimal doping of 0.50 wt.%, which produced higher efficiency (about 96%, compared with 80% for pure ZnO).

Original languageEnglish
Pages (from-to)2439-2447
Number of pages9
JournalAdvanced Powder Technology
Volume27
Issue number6
DOIs
Publication statusPublished - 1 Nov 2016

Fingerprint

Sol-gel process
Doping (additives)
Nanoparticles
Zeta potential
Coloring Agents
Dyes
Congo Red
Phase structure
Cobalt
Solar radiation
Ultraviolet spectroscopy
Sol-gels
Photoluminescence
Energy gap
Optical properties
Particle size
Ions
Transmission electron microscopy
X ray diffraction
Wavelength

Keywords

  • Co ions
  • Nanoparticles
  • Sol-gel
  • ZnO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

Cite this

Synthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method. / Ba-Abbad, Muneer M.; Takriff, Mohd Sobri; Benamor, Abdelbaki; Mohammad, Abdul Wahab.

In: Advanced Powder Technology, Vol. 27, No. 6, 01.11.2016, p. 2439-2447.

Research output: Contribution to journalArticle

@article{8127f593f1c34f0fbf87d9782f6c28fc,
title = "Synthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method",
abstract = "The properties of ZnO nanoparticles were modified by doping them with cobalt ions (Co2+) in various compositions through a sol-gel route. The Co2+-doped ZnO nanoparticles were characterised using X-ray diffraction (XRD), UV/Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and zeta potential measurements. A hexagonal wurtzite-phase structure of Co2+-doped ZnO was observed, with a slight decrease in particle size as the Co2+ doping concentration increased. Absorption by Co2+-doped ZnO was found to shift to longer wavelengths, towards the visible region, which was also confirmed by photoluminescence analysis. The band gap of the Co2+-doped ZnO samples decreased from 3.19 to 2.66 eV as the content of dopant Co2+ increased from 0.0 to 1.0 wt.{\%}. The zeta potential results showed slight effects of Co2+ doping compared with undoped ZnO, indicating that Co2+ doping influences the optical properties and morphology of pure ZnO nanoparticles. The photocatalytic activity of the Co2+-doped ZnO samples was evaluated for the removal of Congo red dye from aqueous solution under solar radiation. The Co2+-doped ZnO samples showed higher effective removal of the dye using the optimal doping of 0.50 wt.{\%}, which produced higher efficiency (about 96{\%}, compared with 80{\%} for pure ZnO).",
keywords = "Co ions, Nanoparticles, Sol-gel, ZnO",
author = "Ba-Abbad, {Muneer M.} and Takriff, {Mohd Sobri} and Abdelbaki Benamor and Mohammad, {Abdul Wahab}",
year = "2016",
month = "11",
day = "1",
doi = "10.1016/j.apt.2016.08.009",
language = "English",
volume = "27",
pages = "2439--2447",
journal = "Advanced Powder Technology",
issn = "0921-8831",
publisher = "Elsevier BV",
number = "6",

}

TY - JOUR

T1 - Synthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method

AU - Ba-Abbad, Muneer M.

AU - Takriff, Mohd Sobri

AU - Benamor, Abdelbaki

AU - Mohammad, Abdul Wahab

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The properties of ZnO nanoparticles were modified by doping them with cobalt ions (Co2+) in various compositions through a sol-gel route. The Co2+-doped ZnO nanoparticles were characterised using X-ray diffraction (XRD), UV/Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and zeta potential measurements. A hexagonal wurtzite-phase structure of Co2+-doped ZnO was observed, with a slight decrease in particle size as the Co2+ doping concentration increased. Absorption by Co2+-doped ZnO was found to shift to longer wavelengths, towards the visible region, which was also confirmed by photoluminescence analysis. The band gap of the Co2+-doped ZnO samples decreased from 3.19 to 2.66 eV as the content of dopant Co2+ increased from 0.0 to 1.0 wt.%. The zeta potential results showed slight effects of Co2+ doping compared with undoped ZnO, indicating that Co2+ doping influences the optical properties and morphology of pure ZnO nanoparticles. The photocatalytic activity of the Co2+-doped ZnO samples was evaluated for the removal of Congo red dye from aqueous solution under solar radiation. The Co2+-doped ZnO samples showed higher effective removal of the dye using the optimal doping of 0.50 wt.%, which produced higher efficiency (about 96%, compared with 80% for pure ZnO).

AB - The properties of ZnO nanoparticles were modified by doping them with cobalt ions (Co2+) in various compositions through a sol-gel route. The Co2+-doped ZnO nanoparticles were characterised using X-ray diffraction (XRD), UV/Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and zeta potential measurements. A hexagonal wurtzite-phase structure of Co2+-doped ZnO was observed, with a slight decrease in particle size as the Co2+ doping concentration increased. Absorption by Co2+-doped ZnO was found to shift to longer wavelengths, towards the visible region, which was also confirmed by photoluminescence analysis. The band gap of the Co2+-doped ZnO samples decreased from 3.19 to 2.66 eV as the content of dopant Co2+ increased from 0.0 to 1.0 wt.%. The zeta potential results showed slight effects of Co2+ doping compared with undoped ZnO, indicating that Co2+ doping influences the optical properties and morphology of pure ZnO nanoparticles. The photocatalytic activity of the Co2+-doped ZnO samples was evaluated for the removal of Congo red dye from aqueous solution under solar radiation. The Co2+-doped ZnO samples showed higher effective removal of the dye using the optimal doping of 0.50 wt.%, which produced higher efficiency (about 96%, compared with 80% for pure ZnO).

KW - Co ions

KW - Nanoparticles

KW - Sol-gel

KW - ZnO

UR - http://www.scopus.com/inward/record.url?scp=85006154508&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85006154508&partnerID=8YFLogxK

U2 - 10.1016/j.apt.2016.08.009

DO - 10.1016/j.apt.2016.08.009

M3 - Article

AN - SCOPUS:85006154508

VL - 27

SP - 2439

EP - 2447

JO - Advanced Powder Technology

JF - Advanced Powder Technology

SN - 0921-8831

IS - 6

ER -