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.