Synthesis, characterization, and antimicrobial application of nano-palladium-doped nano-WO3

Nano-tungsten trioxide (n-WO3) was synthesized by dehydrating tungstic acid (H2WO4) at 300 °C. Nano-palladium (n-Pd) was then loaded as 10 wt% on this n-WO3 by impregnation for the synthesis of the desired n-Pd/n-WO3 photocatalyst. This loading process enhanced the photocatalytic activity of n-WO3 for the removal of Escherichia coli microorganism from water when applying 355-nm UV laser radiation. The absorption and photoluminescence spectra revealed a blue-shift for the band gap energy (Eg) from 2.71 eV for the undoped n-WO3 to 3.5 eV for the doped one. This shift in Eg caused a near resonance condition, which accounts for the significant improvement of the photocatalytic activity upon doping n-WO3.

The loading of nano-palladium on n-WO3 enhanced the photo-catalytic activity of n-WO3 for the removal of Escherichia coli microorganism from water under 355-nm UV laser irradiation.Figure optionsDownload high-quality image (49 K)Download as PowerPoint slide