期刊
CERAMICS INTERNATIONAL
卷 44, 期 18, 页码 22638-22644出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.09.040
关键词
Bi2O3; TiO2; Photocatalysis; Reactive sputtering; Vapour-liquid-solid mechanism; Dendritic
资金
- Portuguese institution Fundacao para a Ciencia e Tecnologia [UID/FIS/04650/2013, SFRH/BD/111720/2015, SFRH/BD/112868/2015]
Dendritic growth of bismuth oxide nanostructured films was accomplished by reactive magnetron sputtering. The deposition of the Bi2O3 template layers was adapted to abide a vapour-liquid-solid mechanism in order to develop a 3D growth morphology with high surface area templates for photocatalytic applications. TiO2 photocatalytic thin films were deposited at a later stage onto Bi2O3 layers. The obtained heterostructured films were characterized by scanning electron microscopy, X-ray diffraction and atomic force microscopy. Additionally, the photocatalytic efficiency was assessed by conducting an assay using methylene blue dye as testing pollutant under a UV-A illumination. The photocatalytic tests revealed that the Bi2O3 layers functionalized with TiO2 thin films are more efficient at degrading the pollutant, by a factor of 6, when compared with the individual layered films.
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