Zn¨CTiO₂ composite films prepared by pulsed electrodeposition

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• 作者：A. Gomes ; M. I. da Silva Pereira ; M. H. Mendon?a and F. M. Costa
• 关键词：TiO2 ; Composite materials ; Thin films ; Electron microscopy ; Crystal structure
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2005
• 出版时间：April 2005
• 年：2005
• 卷：9
• 期：4
• 页码：190-196
• 全文大小：1,063 KB

文摘

The preparation of a Zn–TiO₂ composite film has been performed by pulsed electrodeposition, from acidic zinc sulphate solutions, on an Fe support. The influence of the bath pH and the presence of a cationic surfactant (CTAB) on the composites structural and morphological characteristics has been investigated. The characterization of the samples was made by X-ray diffraction (XRD), scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDS) and atomic force microscopy (AFM). The experimental data show that for the composites prepared at pH 2, the metallic matrix presents a (0 0 2) preferential orientation. At pH=4, the deposit loses the preferred c-axis orientation and in addition a higher content of TiO₂ particles is obtained. The use of the surfactant modifies the shape of the metallic grains, but little effect is observed on the dispersion of the semiconductor particles.