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A top-down synthesis of wurtzite Cu2SnS3 nanocrystals for efficient photoelectrochemical performance

Abstract

In this work, a top-down strategy to prepare metastable wurtzite Cu2SnS3 nanocrystals is reported for the first time. The wurtzite Cu2SnS3 nanocrystals with diameters of 7±3 nm are synthesized by reacting Cu2O nanocubes in a tin metal chalcogenide complex (Sn-MCC) aqueous solution. A conversion process of cubic Cu2O nanocubes → monoclinic Cu7S4 nanoboxes → hexagonal CuS nanoboxes → wurtzite Cu2SnS3 nanoboxes → wurtzite Cu2SnS3 nanocrystals is systematically investigated. It is revealed that formation of hollow nanoboxes is resulted from a Kirkendall effect while evolution from Cu2SnS3 nanoboxes to tiny Cu2SnS3 nanocrystals is due to an etching effect. The Cu2SnS3 nanocrystals sensitized ZnO nanorod arrays are demonstrated as efficient photoanodes for photoelectrochemical (PEC) water splitting. Our work opens up a new door to prepare ecofriendly chalcogenide nanocrystals and their promising applications in solar energy conversion devices.

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Publication details

The article was received on 26 Jan 2018, accepted on 03 Apr 2018 and first published on 11 Apr 2018


Article type: Communication
DOI: 10.1039/C8TA00851E
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    A top-down synthesis of wurtzite Cu2SnS3 nanocrystals for efficient photoelectrochemical performance

    W. Sun, Y. Ye, Y. You and J. Xu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA00851E

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