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SnO2-based thin films with excellent photocatalytic performance

  • Xiang-bin Kong
  • Fang Li
  • Zhong-nan Qi
  • Lei Qi
  • Ming-ming Yao
Article

Abstract

SnO2 semiconductor is a new-typed promising photocatalyst, but wide application of SnO2-based photocatalytic technology has been restricted by low visible light utilization efficiency and rapid recombination of photogenerated electrons–holes. To overcome these drawbacks, we prepared B/Fe codoped SnO2–ZnO thin films on glass substrates through a simple sol–gel method. The photocatalytic activities of the films were evaluated by degradation of organic pollutants including acid naphthol red (ANR) and formaldehyde. UV–Vis absorption spectroscopy and photoluminescence (PL) spectra results revealed that the B/Fe codoped SnO2–ZnO film not only enhanced optical absorption properties but also improved lifetime of the charge carriers. X-ray diffraction (XRD) results indicated that the nanocrystalline SnO2 was a single crystal type of rutile. Field emission scanning electron microscopy (FE-SEM) results showed that the B/Fe codoped SnO2–ZnO film without cracks was composed of smaller nanoparticles or aggregates compared to pure SnO2 film. Brunauer–Emmett–Teller (BET) surface area results showed that the specific surface area of the B/Fe codoped SnO2–ZnO was 85.2 m2 g−1, while that of the pure SnO2 was 20.7 m2 g−1. Experimental results exhibited that the B/Fe codoped SnO2–ZnO film had the best photocatalytic activity compared to a pure SnO2 or singly-modified SnO2 film.

Keywords

SnO2 Total Organic Carbon Photocatalytic Activity Visible Light Irradiation Photogenerated Electron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was financially supported partially by The National Natural Science Foundation of China (Grant No. 21407060) and Shandong Provincial Natural Science Foundation, China (ZR2016BM30).

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical EngineeringUniversity of JinanJinanChina

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