Fabrication and Characterization of Highly Efficient As-Synthesized WO 3 /Graphitic-C 3 N 4 Nanocomposite for Photocatalytic Degradation of Organic Compounds.

The incorporation of tungsten trioxide (WO 3 ) by various concentrations of graphitic carbon nitride (g-C 3 N 4 ) was successfully studied. X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and Diffused Reflectance UV-Vis techniques were applied to investigate morphological and microstructure analysis, diffused reflectance optical properties, and photocatalysis measurements of WO 3 /g-C 3 N 4 photocatalyst composite organic compounds. The photocatalytic activity of incorporating WO3 into g-C 3 N 4 composite organic compounds was evaluated by the photodegradation of both Methylene Blue (MB) dye and phenol under visible-light irradiation. Due to the high purity of the studied heterojunction composite series, no observed diffraction peaks appeared when incorporating WO 3 into g-C 3 N 4 composite organic compounds. The particle size of the prepared composite organic compound photocatalysts revealed no evident influence through the increase in WO 3 atoms from the SEM characteristic. The direct and indirect bandgap were recorded for different mole ratios of WO 3 /g-C 3 N 4, and indicated no apparent impact on bandgap energy with increasing WO 3 content in the composite photocatalyst. The composite photocatalysts' properties better understand their photocatalytic activity degradations. The pseudo-first-order reaction constants (K) can be calculated by examining the kinetic photocatalytic activity.