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Coatings 2019, 9(2), 127; https://doi.org/10.3390/coatings9020127

Tridoped TiO2 Composite Films for Improved Photocatalytic Activities

School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
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Received: 27 December 2018 / Revised: 10 February 2019 / Accepted: 13 February 2019 / Published: 19 February 2019
(This article belongs to the Special Issue Photocatalytic Thin Films)
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Abstract

The Fe/B/F tridoped TiO2-ZnO composite films attached to glass substrates were prepared via a simple sol–gel method. We appraised all samples’ photocatalytic activities by the degradation of methyl green and formaldehyde solutions. The samples were characterized by photoluminescence (PL) spectra, UV-Vis diffraction reflectance absorption spectra (DRS), X-ray diffraction (XRD), differential thermal analysis-thermogravimetry (DTA-TG), field emission scanning electron microscopy (FE-SEM) equipped with energy-dispersive spectroscopy (EDS), and Brunner–Emmet–Teller (BET) measurements. According to the results of DRS and PL spectroscopy, the multi-modification could not only enhance visible light absorption intensity, but also decrease the recombination rate of photo-generated electron-hole pairs. XRD results revealed that the sample was mainly in anatase crystal type. FE-SEM results shown that the sample had fewer particle aggregates and almost no cracks. The specific surface area of the Fe/B/F tridoped TiO2-ZnO was 104.9 m2·g−1, while that of the pure TiO2 was 84.0 m2·g−1. Compared to pure TiO2 and TiO2-ZnO, the Fe/B/F tridoped TiO2-ZnO composite film had the highest photocatalytic activity due to their synergies. View Full-Text
Keywords: TiO2-ZnO film; Fe/B/F tridoping; sol-gel method TiO2-ZnO film; Fe/B/F tridoping; sol-gel method
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Zhao, L.-Z.; Han, K.; Li, F.; Yao, M.-M. Tridoped TiO2 Composite Films for Improved Photocatalytic Activities. Coatings 2019, 9, 127.

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