Hydrothermal synthesis of tungsten oxide nanobelts

Tungsten oxide nanobelts have been hydrothermally fabricated at 180 °C for 12 h with sodium sulfite and cetyltrimethylammonium bromide (CTAB) as assisted, respectively. X-ray diffraction (XRD) pattern indicates that the as-prepared samples are the pure orthorhombic phase WO3. EDS spectra show that the ratio of W/O is about 1:3. The morphology was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Based on a series of comparative experiments under different reaction conditions, the probable formation mechanism of tungsten oxide nanobelts is proposed.