Preparation and characterization of tungsten trioxide nanoplates by low cost acid treatment method

Tungsten trioxide (WO3) nanoplates were grown employing a low cost acid treatment method. Firstly, the tungsten oxide hydrate (WO3·H2O) nanoplates were grown on silicon wafer and glass slide substrate at different HNO3 temperature from 60 to 90°C. The as prepared were the tungsten oxide hydrate (WO3·H2O), then transformed into monoclinic WO3nanoplate after annealed at 400 °C at air ambient for 2 hour. The aim of this study was determined the optimum HNO3 temperature in grown WO3nanoplates. The structure and morphology of WO3nanoplate were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The optical property was determined by UV-Vis spectrophotometer. The result indicated that morphologies was strongly related to the grown temperature and will discuss in this paper. The relationship between morphologies and optical reflection will be discussed.Tungsten trioxide (WO3) nanoplates were grown employing a low cost acid treatment method. Firstly, the tungsten oxide hydrate (WO3·H2O) nanoplates were grown on silicon wafer and glass slide substrate at different HNO3 temperature from 60 to 90°C. The as prepared were the tungsten oxide hydrate (WO3·H2O), then transformed into monoclinic WO3nanoplate after annealed at 400 °C at air ambient for 2 hour. The aim of this study was determined the optimum HNO3 temperature in grown WO3nanoplates. The structure and morphology of WO3nanoplate were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The optical property was determined by UV-Vis spectrophotometer. The result indicated that morphologies was strongly related to the grown temperature and will discuss in this paper. The relationship between morphologies and optical reflection will be discussed.