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Temperature effect on green-synthesized Co3O4 nanoparticle as photocatalyst for overall water splitting

Temperature effect on green-synthesized Co3O4 nanoparticle as photocatalyst for overall water... Abstract.Co3O4 nanoparticles were synthesized by a green synthesis method using bread fungus and cobalt nitrate hexahydrate as the precursors. The effects of the calcination temperature on the structure and properties of nanoparticles, and the ambient temperature on the photocatalytic reaction are discussed. The cubic structure of Co3O4 nanoparticles was obtained, and the grain size was between 14 and 19 nm at different calcination temperatures. Co3O4 calcined at 500°C shows good photocatalytic performance. Without adding any sacrificial agent and cocatalyst, the amount of hydrogen and oxygen released in 5 h were 259.4 and 135.7  μmolg  −  1, respectively. The results show that, with the increase of ambient temperature, the evolution rate of hydrogen and oxygen is accelerated, and the atomic ratio of hydrogen to oxygen is close to 2:1. In addition, the Co3O4 photocatalyst has good stability. Our study provides an environmentally friendly, low-cost, and efficient method for the preparation of cobalt oxide photocatalysts with excellent performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Photonics for Energy SPIE

Temperature effect on green-synthesized Co3O4 nanoparticle as photocatalyst for overall water splitting

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References (37)

Publisher
SPIE
Copyright
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)
ISSN
1947-7988
eISSN
1947-7988
DOI
10.1117/1.JPE.10.042006
Publisher site
See Article on Publisher Site

Abstract

Abstract.Co3O4 nanoparticles were synthesized by a green synthesis method using bread fungus and cobalt nitrate hexahydrate as the precursors. The effects of the calcination temperature on the structure and properties of nanoparticles, and the ambient temperature on the photocatalytic reaction are discussed. The cubic structure of Co3O4 nanoparticles was obtained, and the grain size was between 14 and 19 nm at different calcination temperatures. Co3O4 calcined at 500°C shows good photocatalytic performance. Without adding any sacrificial agent and cocatalyst, the amount of hydrogen and oxygen released in 5 h were 259.4 and 135.7  μmolg  −  1, respectively. The results show that, with the increase of ambient temperature, the evolution rate of hydrogen and oxygen is accelerated, and the atomic ratio of hydrogen to oxygen is close to 2:1. In addition, the Co3O4 photocatalyst has good stability. Our study provides an environmentally friendly, low-cost, and efficient method for the preparation of cobalt oxide photocatalysts with excellent performance.

Journal

Journal of Photonics for EnergySPIE

Published: Oct 1, 2020

Keywords: cobalt oxide; overall water splitting; green synthesis; hydrogen; oxygen

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