A highly reactive catalyst for CO oxidation: CeO2 nanotubes synthesized using carbon nanotubes as removable templates |
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| Authors: | Dengsong Zhang Chengsi Pan Liyi Shi Lei Huang Jianhui Fang Hongxia Fu |
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| Affiliation: | 1. Research Center of Nano Science and Technology, Shanghai University, Shanghai 200444, China;2. Department of Chemistry, Shanghai University, Shanghai 200444, China;1. School of Chemistry and Chemical Engineering, Institute of Clean Energy and Materials, Guangzhou Key Laboratory for Clean Energy and Materials, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China;2. Key Laboratory of Analytical Chemistry for Biomedicine, School of Chemistry, South China Normal University, Guangzhou 510631, China;3. School of Chemistry, The University of Sydney, Sydney 2006, Australia;1. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China;2. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China;3. Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing 210093, PR China |
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| Abstract: | In this work, the nanocomposites, carbon nanotubes (CNTs) coated with nanosized ceria, were prepared by a facile solvothermal method. The obtained nanocomposites have a dense overlayer which is made of nanoparticles with the diameter of ～10 nm. Ceria nanotubes with a porous and hollow structure were fabricated by the removal of CNTs, which possess high surface area and remarkable thermal stability. The products were characterized by X-ray diffraction, transmission electron microscopy, and scanning electron microscopy. The parameters affecting the formation of CeO2 nanotubes were discussed in details. The key steps involved in the formation of the CeO2 nanotubes are solvothermal modifications of CNTs and controlled calcinations. CeO2 nanotubes have an excellent catalytic performance for the CO oxidation. The remains of the templates in the CeO2 nanotubes are considered to play an important part in the enhanced catalytic activity for the formation of CeO2?xCx. |
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