β‑SnWO4 with Morphology-Controlled Synthesis and Facet-Depending Photocatalysis

Faceted β-SnWO4 microcrystals are prepared with different morphologies including tetrahedra, truncated tetrahedra, truncated octahedra, and short-spiked and long-spiked spikecubes. All of these morphologies are prepared with comparable experimental conditions via microwave-assisted synthesis of high...

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Bibliographic Details
Published inACS omega Vol. 4; no. 8; pp. 13400 - 13407
Main Authors Warmuth, Lucas, Feldmann, Claus
Format Journal Article
LanguageEnglish
Published American Chemical Society 20.08.2019
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Summary:Faceted β-SnWO4 microcrystals are prepared with different morphologies including tetrahedra, truncated tetrahedra, truncated octahedra, and short-spiked and long-spiked spikecubes. All of these morphologies are prepared with comparable experimental conditions via microwave-assisted synthesis of high-boiling alcohols (the so-called polyol method). The decisive parameters for controlled formation of one or the other morphology of faceted β-SnWO4 microcrystals are studied and discussed, including microwave-assisted heating, Sn­(OH)2 as the Sn2+ reservoir, the temperature of particle nucleation, the temperature of particle growth, and the concentration of the starting materials. Morphology and crystallinity are characterized by scanning electron microscopy, X-ray powder diffraction, UV–vis, and Fourier-transform infrared spectroscopy. Finally, the photocatalytic properties of all obtained faceted microcrystalstetrahedra, truncated tetrahedra, truncated octahedra, cubes, and short-spiked and long-spiked spikecubesare exemplarily compared with regard to the photocatalytic decomposition of rhodamine B and the influence of the respective surface crystal planes.
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ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.9b01593