Synthesis and characterization of nanocrystalline tungsten oxide nanosheets in large scale

A high quantity of tungsten oxide nanosheets were synthesized by oxidizing tungsten plates with potassium hydrate as the catalyst and tungsten plate as the Substrate. The structural and geometrical properties were characterized by various techniques. It Was found that the crystalline nanosheets have a WO3 structure with thicknesses of 30-50 nm and widths LIP to tells of micrometers. There exist two characteristic acute angles of about 37 degrees or 51 degrees on the nanosheet plane. The formation of these angles and the growth mechanism were discussed.