Preparation of Rectangular WO3·H2O Nanotubes Under Mild Conditions

Abstract WO 3 ·H 2 O nanotubes are successfully synthesized with the aid of intercalated polyaniline (PANI) under relatively mild conditions. More interestingly, the WO 3 ·H 2 O 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.