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首页> 外文期刊>Journal of Materials Engineering and Performance >Preparation of Sn~(4+)-Doped Titanium Dioxide Photocatalytic Films on 304 Stainless Steel by Duplex Treatment
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Preparation of Sn~(4+)-Doped Titanium Dioxide Photocatalytic Films on 304 Stainless Steel by Duplex Treatment

机译：双重处理在304不锈钢上制备Sn〜（4+）掺杂二氧化钛光催化膜

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摘要

Sn~(4+)-doped titanium dioxide photocatalytic films were synthesized on 304 stainless steel (SS) by a duplex treatment. The SS substrates were alloyed with titanium (Ti) through cathodic-arc ion plating followed by a microarc oxidation (MAO) treatment in different electrolytes. Field-emission scanning electron microscopy, x-ray diffraction, and energy dispersive spectroscopy were used to characterize the films surface morphology, crystalline phase, and composition, respectively. Photocatalytic activity was measured using an UV-Vis spectrophotometer. It was found that the films with a porous structure are mainly composed of TiO_2, which exists in an anatase and rutile state. Furthermore, small quantities of SnO_2 have been found in the Sn~(4+)-doped titanium dioxide films. The fraction of anatase varies with the MAO time and electrolytes, whereas the pore size remains the similar with the same MAO current intensity and density and the surface roughness increases slightly with increasing MAO time. It was also found that the photocatalytic activity of the Sn~(4+)-doped porous film improved, and the film synthesized with a shorter MAO time in a lower Na_2SnO_3-containing electrolyte is superior to the films with longer MAO times and higher Na_2SnO_3 concentrations.
机译：通过双相处理在304不锈钢（SS）上合成了Sn〜（4+）掺杂二氧化钛光催化薄膜。通过阴极电弧离子镀将SS衬底与钛（Ti）合金化，然后在不同的电解质中进行微弧氧化（MAO）处理。场发射扫描电子显微镜，X射线衍射和能量色散光谱分别用于表征膜的表面形态，晶相和组成。使用UV-Vis分光光度计测量光催化活性。发现具有多孔结构的膜主要由TiO 2组成，其以锐钛矿和金红石状态存在。此外，在Sn〜（4+）掺杂的二氧化钛薄膜中发现了少量的SnO_2。锐钛矿的比例随MAO时间和电解质的变化而变化，而在相同的MAO电流强度和密度下，孔径保持相似，并且随着MAO时间的增加，表面粗糙度略有增加。研究还发现，掺杂Sn〜（4+）的多孔膜的光催化活性得到改善，在较低Na_2SnO_3电解质中以较短的MAO时间合成的膜优于具有较长MAO时间和较高Na_2SnO_3的膜。浓度。

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