Synthesis, Reactivity, and Cytotoxicity Effect of Pt-Pd-Rh Nanocomposite Cordierite Catalyst during Oxidation of Ammonia Processes
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15, Issue 1
Abstract
The behavior of the ammonia oxidation was studied by selective catalytic oxidation (SCO) over a Pt-Pd-Rh nanocomposite cordierite catalyst in a tubular fixed-bed flow quartz reactor at temperatures between 423 and 623 K. The catalysts’ surface properties were characterized using scanning transmission electron microscopy-energy-dispersive X-ray, optical microscopy, and ultraviolet visible. The experimental results show that high activities for removal were achieved during catalytic oxidation over the Pt-Pd-Rh cordierite catalyst at 623 K with an oxygen content of 4%. was the main product in the -SCO process over the Pt-Pd-Rh nanocomposite cordierite catalyst. These results also verify the Pt-Pd-Rh metals on cordierite surfaces, resulting in the formation of catalytically active sites at the metal-support interface in the reduction of in this process. In addition, the Pt-Pd-Rh nanocomposite cordierite-induced cytotoxicity testing was mainly applied to the human lung MRC-5 cell line, and the percentage of cell survival was determined by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium analysis in vitro. For Pt-Pd-Rh nanocomposite cordierite, only minor cytotoxicity was observed when human lung cells were exposed.
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Acknowledgments
The writer would like to acknowledge the National Science Council of the Republic of China, Taiwan for partly financially supporting this research under Contract No. NSCTNSC 98-2221-E-132-003-MY3. The writer thanks Professor M. F. Shue in the Department of Environmental Engineering and Science at Tajen University of Science and Technology for her support and valuable discussions.
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15 • Issue 1 • January 2011
Pages: 37 - 41
Copyright
© 2011 ASCE.
History
Received: Apr 20, 2010
Accepted: Jul 23, 2010
Published online: Jul 26, 2010
Published in print: Jan 2011
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