Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1644316 | Materials Letters | 2014 | 4 Pages |
Abstract
Polycrystalline bismuth titanate (Bi12TiO20) films were prepared on bismuth substrates with an electrochemical process based on the anodic spark deposition in an aqueous electrolyte at room temperature. The X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) results revealed that varying current density (CD) can tailor the microstructure and optical property of Bi12TiO20 films. The higher the electric current, the more favored the crystallinity of Bi12TiO20 phase. At lower CD of 0.25Â AÂ cmâ2 the films with uniformly distributed small grains of ca. 25Â nm were prepared, while the films formed at higher CD of 0.75Â AÂ cmâ2 were composed of large grains accompanied by many crater-like pores. UV-vis adsorption spectra showed that all the prepared Bi12TiO20 films exhibited good absorption ability both in UV and visible light regions.
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Authors
Zuwei Song, Hui Dai,