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Alkali Type-dependent Morphology Modulation of SnO for Photocatalytic Applications: From Microplate to Hierarchical Architectures Self-assembled by Nanosheets with Controllable Thickness

Abstract

Shape-controllable SnO microstructures were successfully synthesized by a facile inorganic alkali-assisted hydrothermal method. The morphologies of the prepared samples could be simply modulated from plate-like blocks to hierarchical architectures assembled by nanosheets with tuned thickness including flowers, bird nests and microspheres through varying the alkali used in the synthesis process. Based on the experimental results, the origin and detailed formation mechanism of the plate-like and hierarchical SnO architectures were attentively proposed, respectively. It was found that the formation of SnO was governed by dissolution-recrystallization and oriented attachment process, the different dissociation rate of various alkali played an important role on the final SnO morphology. The thickness of the assembling nanosheets greatly decreased with the increase of dissociation rate of alkali. Furthermore, it was proved experimentally that all the hierarchical SnO structures exhibited better photocatalytic activities than those of plate-like structures in the photodegradation of MB under fluorescent and UV light irradiation. The microspheres with the decreased size and thickness of the assembling nanosheets showed the highest activity for dye degradation of MB owing to the increased specific surface area and the reduced recombination of photogenerated electron-hole pairs. The mechanism for the photocatalytic degradation of MB over the SnO was discussed in detail.

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Publication details

The article was received on 28 Apr 2018, accepted on 13 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8CE00687C
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Alkali Type-dependent Morphology Modulation of SnO for Photocatalytic Applications: From Microplate to Hierarchical Architectures Self-assembled by Nanosheets with Controllable Thickness

    R. Zhang, Q. Wang, J. Zhang, L. Yin, Y. Li, S. Yin and W. Cao, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00687C

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