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Concave structure of Cu2O truncated microcubes: PVP assisted {100} facet etching and improved facet-dependent photocatalytic properties

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Abstract

In this work, a concave structure of Cu2O truncated microcubes with {100} facet erosion has been successfully synthesized by a facile top-down etching method. Air and PVP were employed as an etchant and a shape controller agent, respectively. For the facet-selective capping of PVP on Cu2O {111} planes, the traditional relatively low energy {100} facets of Cu2O truncated microcubes would be selectively etched along their [100] zone axis in a top-down manner. The {100} facet etched Cu2O concave truncated microcubes exhibited highly improved photocatalytic activities (2.15 and 1.21 times, respectively) compared to that of the basic structure and the {111} facet etched samples on the degradation of Congo red (CR), displaying distinct facet-dependent photocatalytic characteristics, excellent stability and reusability. This work not only builds an efficient photocatalyst, but also provides a novel method to fabricate a variety of architectures with low energy facets etched and highly active crystal planes exposed, which is extremely important for the improvement of catalytic activities.

Graphical abstract: Concave structure of Cu2O truncated microcubes: PVP assisted {100} facet etching and improved facet-dependent photocatalytic properties

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Publication details

The article was received on 09 Aug 2018, accepted on 24 Sep 2018 and first published on 24 Sep 2018


Article type: Paper
DOI: 10.1039/C8CE01332B
Citation: CrystEngComm, 2018, Advance Article
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    Concave structure of Cu2O truncated microcubes: PVP assisted {100} facet etching and improved facet-dependent photocatalytic properties

    P. Li, D. Li, L. Liu, A. Li, C. Luo, Y. Xiao, J. Hu, H. Jiang and W. Zhang, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE01332B

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