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

M. A. Gondal*, A. Bagabas, A. Dastageer, A. Khalil

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)78-83
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume323
Issue number1-2
DOIs
StatePublished - 17 May 2010

Bibliographical note

Funding Information:
The support by King Abdulaziz City for Science and Technology (KACST) through project number 28-40 and King Fahd University of Petroleum & Minerals (KFUPM) is gratefully acknowledged.

Keywords

  • Escherichia coli
  • Laser-induced photocatalysis
  • Nano-palladium-doped nano-tungsten trioxide
  • Near resonance photocatalysis

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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