Abstract
In this study, mesoporous tungsten oxide nanostructure was successfully synthesized using inexpensive peroxotungstic acid as a tungsten precursor, and pluronic P123 blockcopolymer as a template. Various techniques such as differential thermal analysis, thermogravimetric analysis, Fourier transformed infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, nitrogen adsorption/desorption analysis, and UV–Vis spectroscopy were utilized to characterize the prepared tungsten oxide. Nitrogen adsorption/desorption analysis demonstrated the formation of mesoporous structure with the specific surface area of 67 m2/g and pore size of ~ 6 nm after calcination at 500 oC for 1 h. Microstuctural investigation by field emission scanning electron microscopy images revealed the existence of spherical morphology for the prepared mesoporous tungsten oxide powder. X-ray diffraction analysis confirmed the formation of orthorhombic crystalline structure. In addition, the calculated energy band gap of the calcined product was found to be 2.60 eV. Further, photocatalytic activity of the synthesized crystalline powder was verified for Rhodamine B degradation, giving rise to 79% dye removal from aqueous solution with 6 mg/L concentration under ultraviolet irradiation.
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