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Issue 41, 2018
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UV/visible light active CuCrO2 nanoparticle–SnO2 nanofiber p–n heterostructured photocatalysts for photocatalytic applications

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Abstract

CuCrO2 nanoparticle decorated SnO2 nanofiber composites have been prepared as novel p–n heterostructured semiconductor photocatalysts for the degradation of organic pollutants in wastewater. The 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 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 was 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 a 41% higher rate constant value compared to pure SnO2 nanofibers in the degradation of methylene blue dye molecules and reached 83% degradation under UV/visible light irradiation after 1 h. The increase in the photocatalytic activity was ascribed to the incorporation of Cr3+ and Cu+ cations into the SnO2 host lattice and the more effective electron–hole pair separation in the heterostructured sample. The presented data here are highly convincing in comparison to those of UV active p–n heterostructured photocatalysts reported previously in the 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.

Graphical abstract: UV/visible light active CuCrO2 nanoparticle–SnO2 nanofiber p–n heterostructured photocatalysts for photocatalytic applications

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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., 2018,47, 14662-14678
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    UV/visible light active CuCrO2 nanoparticle–SnO2 nanofiber p–n heterostructured photocatalysts for photocatalytic applications

    S. Dursun, I. C. Kaya, V. Kalem and H. Akyildiz, Dalton Trans., 2018, 47, 14662
    DOI: 10.1039/C8DT02850H

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