Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite
Co3O4/SiO2 nanocomposite was obtained via citrate-gel method. 22 nm in size Co3O4 particles in an amorphous SiO2 matrix were obtained. Co3O4:SiO2 wt. ratio was verified using EDX and found to be close to the 80 % nominal ratio. The UV-Vis measurements showed broad absorption bands at around 440 and...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Trans Tech Publications, Switzerland
2016
|
Subjects: | |
Online Access: | http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/1/fist-2016-gomaa-Optical%20and%20Electrochemical%20Properties%20.pdf |
id |
ump-4769 |
---|---|
recordtype |
eprints |
spelling |
ump-47692018-07-26T03:26:37Z http://umpir.ump.edu.my/id/eprint/4769/ Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite Ali, Gomaa A. M. Fouad, Osama A. S. A., Makhlouf M. M., Yusoff K. F., Chong QD Chemistry Co3O4/SiO2 nanocomposite was obtained via citrate-gel method. 22 nm in size Co3O4 particles in an amorphous SiO2 matrix were obtained. Co3O4:SiO2 wt. ratio was verified using EDX and found to be close to the 80 % nominal ratio. The UV-Vis measurements showed broad absorption bands at around 440 and 790 nm. The optical band gap values were 1.95 and 1.35 eV respectively, being close to those observed for pure Co3O4 nanoparticles. The electrochemical measurements in 5 M KOH solution were performed using a three-electrode type system. Co3O4/SiO2 nanocomposite exhibited high specific capacitance reaching 758 F g-1 at 2.5 mV s-1. Very small solution and electrode-electrolyte interfacial charge transfer resistances were obtained when impedance spectra were analysed. Trans Tech Publications, Switzerland 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/4769/1/fist-2016-gomaa-Optical%20and%20Electrochemical%20Properties%20.pdf Ali, Gomaa A. M. and Fouad, Osama A. and S. A., Makhlouf and M. M., Yusoff and K. F., Chong (2016) Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite. Advanced Materials Research, 1133. pp. 447-451. ISSN 1022-6680 (print), 1662-8985 (online) http://www.scientific.net/AMR.1133.447 DOI: 10.4028/www.scientific.net/AMR.1133.447 |
repository_type |
Digital Repository |
institution_category |
Local University |
institution |
Universiti Malaysia Pahang |
building |
UMP Institutional Repository |
collection |
Online Access |
language |
English |
topic |
QD Chemistry |
spellingShingle |
QD Chemistry Ali, Gomaa A. M. Fouad, Osama A. S. A., Makhlouf M. M., Yusoff K. F., Chong Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
description |
Co3O4/SiO2 nanocomposite was obtained via citrate-gel method. 22 nm in size Co3O4 particles in an amorphous SiO2 matrix were obtained. Co3O4:SiO2 wt. ratio was verified using EDX and found to be close to the 80 % nominal ratio. The UV-Vis measurements showed broad absorption bands at around 440 and 790 nm. The optical band gap values were 1.95 and 1.35 eV respectively, being close to those observed for pure Co3O4 nanoparticles. The electrochemical measurements in 5 M KOH solution were performed using a three-electrode type system. Co3O4/SiO2 nanocomposite exhibited high specific capacitance reaching 758 F g-1 at 2.5 mV s-1. Very small solution and electrode-electrolyte interfacial charge transfer resistances were obtained when impedance spectra were analysed. |
format |
Article |
author |
Ali, Gomaa A. M. Fouad, Osama A. S. A., Makhlouf M. M., Yusoff K. F., Chong |
author_facet |
Ali, Gomaa A. M. Fouad, Osama A. S. A., Makhlouf M. M., Yusoff K. F., Chong |
author_sort |
Ali, Gomaa A. M. |
title |
Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
title_short |
Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
title_full |
Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
title_fullStr |
Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
title_full_unstemmed |
Optical and Electrochemical Properties of Co3O4/SiO2 Nanocomposite |
title_sort |
optical and electrochemical properties of co3o4/sio2 nanocomposite |
publisher |
Trans Tech Publications, Switzerland |
publishDate |
2016 |
url |
http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/ http://umpir.ump.edu.my/id/eprint/4769/1/fist-2016-gomaa-Optical%20and%20Electrochemical%20Properties%20.pdf |
first_indexed |
2023-09-18T21:59:40Z |
last_indexed |
2023-09-18T21:59:40Z |
_version_ |
1777414314113630208 |