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 language | English |
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Pages (from-to) | 78-83 |
Number of pages | 6 |
Journal | Journal of Molecular Catalysis A: Chemical |
Volume | 323 |
Issue number | 1-2 |
DOIs | |
State | Published - 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