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...

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Main Authors: Ali, Gomaa A. M., Fouad, Osama A., S. A., Makhlouf, M. M., Yusoff, K. F., Chong
Format: Article
Language:English
Published: Trans Tech Publications, Switzerland 2016
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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
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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
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