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Jo WK, Clament Sagaya Selvam N. Enhanced visible light-driven photocatalytic performance of ZnO-g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite. J Hazard Mater. 2015;299:462-70doi: 10.1016/j.jhazmat.2015.07.042.
Jo, W. K., & Clament Sagaya Selvam, N. (2015). Enhanced visible light-driven photocatalytic performance of ZnO-g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite. Journal of hazardous materials, 299462-70. https://doi.org/10.1016/j.jhazmat.2015.07.042
Jo, Wan-Kuen, and Clament Sagaya Selvam, N. "Enhanced visible light-driven photocatalytic performance of ZnO-g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite." Journal of hazardous materials vol. 299 (2015): 462-70. doi: https://doi.org/10.1016/j.jhazmat.2015.07.042
Jo WK, Clament Sagaya Selvam N. Enhanced visible light-driven photocatalytic performance of ZnO-g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite. J Hazard Mater. 2015 Dec 15;299:462-70. doi: 10.1016/j.jhazmat.2015.07.042. Epub 2015 Jul 21. PMID: 26241772.
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J Hazard Mater. 2015 Dec 15;299:462-70. doi: 10.1016/j.jhazmat.2015.07.042. Epub 2015 Jul 21.

Enhanced visible light-driven photocatalytic performance of ZnO-g-C3N4 coupled with graphene oxide as a novel ternary nanocomposite.

Journal of hazardous materials

Wan-Kuen Jo, N Clament Sagaya Selvam

Affiliations

  1. Department of Environmental Engineering, Kyungpook National University, Daegu 702-701, South Korea.
  2. Department of Environmental Engineering, Kyungpook National University, Daegu 702-701, South Korea. Electronic address: [email protected].

PMID: 26241772 DOI: 10.1016/j.jhazmat.2015.07.042

Abstract

This article reports a novel ternary nanocomposite consisting of ZnO, g-C3N4, and graphene oxide (GO) that provides enhanced photocatalytic performance and stability. The ZnO nanospheres disperse evenly and embed themselves in the porous g-C3N4. Composites with various g-C3N4 and GO to ZnO weight ratios were synthesized and characterized systematically. The results indicated that the absorption of binary g-C3N4/ZnO nanocomposites shifted to a lower energy compared to pure ZnO in a fashion consistent with the loading content of g-C3N4. Notably, the loading content of GO in the ZnO-g-C3N4 composite resulted in increased absorption in the visible range and improved charge separation efficiency, thereby drastically improving photocatalytic activity. Successful hybridization of ternary nanocomposite was confirmed by drastic quenching of fluorescence and broader visible light absorption. The optimal content of g-C3N4 in the ZnO-g-C3N4 composite was 50%, which exhibited the effective hybridization between ZnO and g-C3N4, and high photocatalytic efficiency. However, the photocatalytic degradation of the ternary nanocomposite showed performance that was two times greater than ZnO-g-C3N4, exhibiting 99.5% degradation efficiency after just 15 min of light irradiation. The combined heterojunction and synergistic effects of this composite account for the improved photocatalytic activity.

Copyright © 2015 Elsevier B.V. All rights reserved.

Keywords: Graphene oxide; Photocatalysis; Visible-light; ZnO; g-C(3)N(4)

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