Anodization, Precursor Route to Flowerlike Patterns Composed of Nanoporous Tin Oxide Nanostrips on Tin Substrate
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- 作者：Shuanglong Feng ; Yiwen Tang* ; Ting Xiao
- 刊名：Journal of Physical Chemistry C
- 出版年：2009
- 出版时间：March 26, 2009
- 年：2009
- 卷：113
- 期：12
- 页码：4809-4813
- 全文大小：390K
- 年卷期：v.113,no.12(March 26, 2009)
- ISSN：1932-7455
文摘
In the present work, we report for the first time an investigation on anodic oxidation of tin in an electrolyte of dimethyl sulfoxide (DMSO)/water mixtures containing citric acid in the trans-passive region. The anodization leads to the formation of flowerlike patterns composed of tin citrate complex nanostrips on tin substrates. The products were characterized using XRD, SEM, TEM, FTIR, and XPS measurements. The formation mechanism of the tin citrate complex microstructures is discussed and the influences of the voltage, citric acid concentration, and electrolyte composition on the morphology of the microstructures were investigated. The nanostrips with a smooth surface can be transformed to polycrystalline SnO2 nanostrips with a porous structure by a thermal annealing process. This work developed a simple, clean, and effective route for fabrication of large area SnO2 nanostructured films.