Electrospun Nanofibers of ZnO−SnO2 Heterojunction with High Photocatalytic Activity

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• 作者：Zhenyi Zhang ; Changlu Shao ; Xinghua Li ; Li Zhang ; Hongmei Xue ; Changhua Wang ; Yichun Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：May 6, 2010
• 年：2010
• 卷：114
• 期：17
• 页码：7920-7925
• 全文大小：313K
• 年卷期：v.114,no.17(May 6, 2010)
• ISSN：1932-7455

文摘

One-dimensional ZnO−SnO₂ nanofibers with high photocatalytic activity have been successfully synthesized by a simple combination method of sol−gel process and electrospinning technique. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, nitrogen adsorption−desorption isotherm analysis, UV−vis diffuse reflectance (DR), and photoluminescence (PL) spectroscopy were used to characterize the as-synthesized nanofibers. The results indicated that the ZnO−SnO₂ nanofibers with diameters of 100−150 nm consisted of wurtzite ZnO and rutile SnO₂. The photocatalytic activity of the ZnO−SnO₂ nanofibers for the degradation of rhodamine B (RB) was much higher than that of electrospun ZnO and SnO₂ nanofibers, which could be attributed to the formation of a ZnO−SnO₂ heterojunction in the ZnO−SnO₂ nanofibers and the high specific surface area of the ZnO−SnO₂ nanofibers. Notably, the ZnO−SnO₂ nanofibers could be easily recycled without the decrease of the photocatalytic activity due to their one-dimensional nanostructural property.