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Ce1–x Co x O2 Nanorods Prepared by Microwave-Assisted Hydrothermal Method: Novel Catalysts for Removal of Volatile Organic Compounds

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In this study, nanorods of a Ce1– x Co x O2 system, with x = 0, 0.05, 0.10, 0.15 and 0.20, were synthesized employing a microwave-assisted hydrothermal method and their catalytic activity in the total oxidation of three VOCs (benzene, toluene and o-xylene) was investigated. The physicochemical characterization showed that the inclusion of cobalt led to an increase in the oxygen vacancies in the system. Also, an increase in the catalytic activity was observed with the progressive incorporation of cobalt into the ceria matrix. The results revealed that the Ce0.80Co0.20O2 catalyst was able to remove 100% of the benzene, nearly 100% of the toluene and around 70% of the o-xylene. Increasing the amount of oxygen vacancies could result in an enhancement of the bulk and surface oxygen mobility. The higher oxidation activity observed for the catalyst with the highest cobalt load can be attributed to a combination of several factors, including a greater number of active sites of the cobalt being exposed and greater mobility of the active oxygen species.
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Keywords: CATALYTIC OXIDATION; HYDROTHERMAL METHOD; NANORODS; VOLATILE ORGANIC COMPOUNDS

Document Type: Research Article

Publication date: July 1, 2015

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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