Preparation of Sn-Zn-O thin film for its potential applications in photodegradation of organic dyes

The Sn-Zn-O thin film shows a porous plate-like morphology. [Display omitted] •The novel Sn-Zn-O thin films were deposited by sol-gel method.•The influence of thermal treatment on the samples was investigated.•The heat-treated Sn-Zn-O films show a porous plate-like morphology.•The Sn-Zn-O films exhi...

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Veröffentlicht in:Materials letters 2018-12, Vol.233, p.42-46
Hauptverfasser: Xu, Linhua, Kuang, Wenjian, Lai, Min, Miao, Juhong, Zhang, Lei, Zhang, Ruofan
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Sprache:eng
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Zusammenfassung:The Sn-Zn-O thin film shows a porous plate-like morphology. [Display omitted] •The novel Sn-Zn-O thin films were deposited by sol-gel method.•The influence of thermal treatment on the samples was investigated.•The heat-treated Sn-Zn-O films show a porous plate-like morphology.•The Sn-Zn-O films exhibit better photocatalytic performance than pure ZnO. In this work, novel nanoplate-like Sn-Zn-O thin films were prepared by a sol-gel method and the effect of thermal treatment on the component and morphology was investigated. The photocatalytic activity was evaluated by photodegradation of Methylene blue. The results of X-ray diffraction show that the as-grown sample is a mixture of crystalline zinc hydroxystannate (ZnSn(OH)6) and amorphous ZnO; ZnSn(OH)6 is preferentially oriented along the (2 0 0) plane and has a platy morphology. With the increase of heating temperature, the compact and smooth nanoplates evolve into porous nanoplates, and the ZnSn(OH)6 is transformed into zinc metastannate (ZnSnO3), and the crystallinity of ZnO is gradually improved. For the heat-treated samples, the optical absorption spectra display two absorption edges corresponding to ZnO and ZnSnO3. The photocatalytic performance of Sn-Zn-O films is much higher than that of pure ZnO films and it shows good reproducibility.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2018.08.142