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Hierarchical meso–macroporous titania-supported CuO nanocatalysts: preparation, characterization and catalytic CO oxidation

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Abstract

Hierarchically mesoporous–macroporous titanium dioxide (MMTD) was synthesized by the hydrolysis of tetrabutyl titanate in the absence of surfactant and autoclaving at 60 °C, which exhibits a porous hierarchy of wormhole-like mesostructure in the framework of macrochannels. Different contents of CuO nanoparticles were supported on the MMTD by a deposition–precipitation (DP) method, retaining the high surface areas and hierarchical porosity. The prepared MMTD support and the resulting CuO/MMTD nanocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption analysis, temperature-programmed reduction (TPR), and X-ray photoelectron spectroscopy (XPS) techniques. Their catalytic behavior for low-temperature CO oxidation was studied by using a microreactor–GC system, and the CuO/MMTD catalyst with 8 wt% CuO content and calcined at 400 °C was found to have the highest catalytic activity. The catalytic activity depended on the CuO loading amount, the precalcination temperature, the meso–macroporous framework, the surface area, and the particle size of the CuO/MMTD catalysts.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Nos. 20473041 and 20673060), the National Basic Research Program of China (No. 2009CB623502), the Specialized Research Fund for the Doctoral Program of Higher Education (20070055014), the Natural Science Foundation of Tianjin (08JCZDJC21500), the Fund from Hebei Provincial Department of Education (2007313), the Chinese-Bulgarian Scientific and Technological Cooperation Project, the Program for New Century Excellent Talents in University (NCET-06-0215), and Nankai University.

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Authors and Affiliations

  1. Tianjin Key Laboratory of Energy-Material Chemistry (Tianjin) and Engineering Research Center of Energy Storage and Conversion (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China

    Jian-Liang Cao, Gao-Song Shao, Tian-Yi Ma, Yan Wang, Shi-Hua Wu & Zhong-Yong Yuan

  2. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, People’s Republic of China

    Tie-Zhen Ren

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  1. Jian-Liang Cao
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  2. Gao-Song Shao
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  3. Tian-Yi Ma
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  4. Yan Wang
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  5. Tie-Zhen Ren
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  6. Shi-Hua Wu
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  7. Zhong-Yong Yuan
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Correspondence to Zhong-Yong Yuan.

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Cao, JL., Shao, GS., Ma, TY. et al. Hierarchical meso–macroporous titania-supported CuO nanocatalysts: preparation, characterization and catalytic CO oxidation. J Mater Sci 44, 6717–6726 (2009). https://doi.org/10.1007/s10853-009-3583-8

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  • DOI: https://doi.org/10.1007/s10853-009-3583-8

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