Enhancement of the Visible-Light Photocatalytic Activity of In2O3-TiO2 Nanofiber Heteroarchitectures
Enhancement of the Visible-Light Photocatalytic Activity of In2O3-TiO2 Nanofiber Heteroarchitectures
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DOI：
10.1021/am201499r
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发表时间：
2012-01-01
影响因子：
9.5
通讯作者：
Liu, Yichun
中科院分区：
文献类型：
--
作者：
Mu, Jingbo;Chen, Bin;Liu, Yichun
采用静电纺丝技术和溶剂热技术相结合的方法，成功制备了具有高可见光催化活性的一维In 2 O3-TiO 2异质结构。采用场发射扫描电子显微镜（FE-SEM）、X射线能谱（EDX）、透射电子显微镜（TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和紫外-可见光谱（UV-vis）对产物进行了表征。结果表明，在一次TiO 2纳米纤维衬底上成功地生长了二次In 2 O3纳米结构。与纯TiO 2纳米纤维相比，In 2 O3/TiO 2异质结构的形成提高了TiO 2对罗丹明B（RB）的可见光催化降解活性，这可能是由于TiO 2和In 2 O3异质结构的耦合作用提高了光生电子和空穴的分离。此外，In 2 O3-TiO 2异质结构可以很容易地回收，而不会降低光催化活性，因为它们的一维纳米结构的性质。
One-dimensional In2O3-TiO2 heteroarchitectures with high visible-light photocatalytic activity have been successfully obtained by a simple combination of electrospinning technique and solvothermal process. The as-obtained products were characterized by field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis spectra. The results revealed that the secondary In2O3 nanostructures were successfully grown on the primary TiO2 nanofibers substrates. Compared with the pure TiO2 nanofibers, the obtained In2O3 TiO2 heteroarchitectures showed enhancement of the visible-light photocatalytic activity to degrade rhodamine B (RB) because of the formation of heteroarchitectures, which might improve the separation of photogenerated electrons and holes derived from the coupling effect of TiO2 and In2O3 heteroarchitectures. Moreover, the In2O3-TiO2 heteroarchitectures could be easily recycled without the decrease in the photocatalytic activity because of their one-dimensional nanostructural property.