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UV/Visible Light Active CuCrO2 Nanoparticle-SnO2 Nanofiber p-n Heterostructured Photocatalyst for Photocatalytic Applications

Abstract

CuCrO2 nanoparticle decorated SnO2 nanofiber composites have been prepared as a novel p-n heterostructured semiconductor photocatalysts for the degradation of organic pollutants in waste water. Composite structure was achieved via drop casting of various amounts of hydrothermally derived CuCrO2 nanoparticles on electrospun SnO2 nanofibers. The microstructural and morphological features of each semiconductor and the formation of the p-n heterojunctions between them were characterized. In addition, the photo-response and electrochemical properties of the samples were determined. The photocatalytic activity of the heterostructured photocatalysts were investigated systematically as a function of the amount of CuCrO2 nanoparticles in the samples. Experimental results showed that the optimal decoration amount was 0.6 wt. % CuCrO2 on SnO2. This composite photocatalyst displayed 41 % higher rate constant value compared to pure SnO2 nanofibers in the degradation of methylene blue dye molecules and reached to 83 % degradation under UV/visible light irradiation after 1 h. The increase in the photocatalytic activity was ascribed to incorporation of Cr3+ and Cu+ cations into SnO2 host lattice and the more effective electron-hole pair separation in heterostructured sample. The presented data here are highly convincing in comparison to UV active p-n heterostructured photocatalysts reported previously in literature. Therefore, this work opens the way to develop visible light active p-n heterostructured semiconductor photocatalysts using p-type delafossites with n-type oxides.

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Publication details

The article was received on 11 Jul 2018, accepted on 11 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT02850H
Citation: Dalton Trans., 2018, Accepted Manuscript
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    UV/Visible Light Active CuCrO2 Nanoparticle-SnO2 Nanofiber p-n Heterostructured Photocatalyst for Photocatalytic Applications

    S. Dursun, İ. C. Kaya, V. Kalem and H. Akyildiz, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT02850H

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