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Synthesis and characterization of tungsten trioxide (WO3) as photocatalyst against wastewater pollutants by Ali Aldrees; Hayat Khan; Abdulaziz Alzahrani; Salisu Dan’azumi is a Environmental Science article available to read on EtoBox.

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## Abstract In this work, crash precipitation technique was employed to synthesize a visible light-responsive tungsten trioxide (WO~3~) photocatalyst using ammonium paratungstate as tungsten precursor. The spray-dried (120 °C) and calcined (600 °C) WO~3~ powder was characterized by analyzing methods of XRD, PSD, BET and BJH, Raman, FESEM/EDX, FTIR, UV–vis DRS and XPS spectroscopy. X-ray diffraction (XRD) and Raman studies confirm the well crystalline monoclinic crystal structure. Scanning electron microscopy (SEM) images showed micron-sized spherical bulks of WO~3~ particles with needle-like morphology. A normal distribution with a d~50~ (median diameter) value of 6.0 μm was observed with particle size analysis. Much enhanced BET surface area of 102 g/m^2^ with wide pore size 1.8 nm is measured compared to commercially available WO~3~ that results in increased pollutants surface adsorption. Fourier transform infrared spectroscopy (FTIR) study demonstrated that the calcined sample surface is enriched with bonded hydroxyl groups, beneficial for powder particles activity. Photocatalyst band gap was calculated by considering the absorbance measurements recorded on UV–vis diffuse reflec

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Author

Ali Aldrees; Hayat Khan; Abdulaziz Alzahrani; Salisu Dan’azumi

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)