Preparation, Performance, and Cytotoxicity Evaluation of Nanoarchitectures Composite Catalysts for the Catalytic Decomposition of Ammonia
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 16, Issue 1
Abstract
This work discusses the oxidation of ammonia ( ) at temperatures between 150 and 400°C (423 and 673 K) by selective catalytic oxidation (SCO) over a nanoarchitectures composite catalyst that was prepared through coprecipitation (CP) method of copper nitrate and cerium nitrate at molar ratio of . The catalysts were characterized using thermogravimetric analysis (TGA), BET, analytical scanning transmission electron microscopy (AEM), and cyclic voltammetric (CV) measurement. The experimental results demonstrate that the presence of ammonia was removed around 97% reduction was achieved during catalytic oxidation over the nanoarchitectures composite catalyst calcine treated at 500°C (773 K) with an oxygen content of 4%. The composite particles were characterized by AEM, with a particle size around nanoscale particle sizes ( ) with high dispersion phenomena. The nanoarchitectures composite-induced cytotoxicity in the human lung cell line, MRC-5, was tested, and cell survival was determined by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetra-zolium (MTS) analysis in vitro. These results indicated that the nanoarchitectures composite catalyst is only weakly cytotoxic to human lung cells.
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Acknowledgments
The writer would like to thank the National Science Council of the Republic of China, Taiwan, for partial financial support of this research under Contract No. UNSPECIFIEDNSC 98-2221-E-132-003-MY3.
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Information & Authors
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Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 16 • Issue 1 • January 2012
Pages: 58 - 62
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 28, 2010
Accepted: Jan 13, 2011
Published online: Jan 17, 2011
Published in print: Jan 1, 2012
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