Preparation of Rectangular WO3·H2O Nanotubes Under Mild Conditions


  • We are grateful to the National “863” Foundation, Shanghai Special Nano Foundation, and Trans-century Outstanding Talented Person Foundation of the China Educational Ministry for financial support of this work.


WO3·H2O nanotubes are successfully synthesized with the aid of intercalated polyaniline (PANI) under relatively mild conditions. More interestingly, the WO3·H2O nanotubes have a rectangular cross-section structure formed through a rolling mechanism. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, Fourier-transform infrared analysis, UV-vis-near-IR spectroscopy, selected-area electron diffraction, and vibrating-sample magnetometry analysis are employed to characterize the morphology, structure, and properties of the nanotubes.