双模板制备CeO2.pdf

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双模板制备CeO2

i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 8 ( 2 0 1 3 ) 4 4 4 5 e4 4 5 5 Available online at journal homepage: /locate/he Dual-templating fabrication of three-dimensionally ordered macroporous ceria with hierarchical pores and its use as a support for enhanced catalytic performance of preferential CO oxidation Zhi Liu*, Yuan Yang, Junhua Mi, Xiuli Tan, Cong Lv Institute of Chemistry for Functionalized Materials, Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, PR China a r t i c l e i n f o a b s t r a c t Article history: In this study, several three-dimensionally ordered macroporous (3DOM) CeO2 having hi- Received 6 October 2012 erarchical pore structure were successfully prepared via a dual ‘hard-soft’ templating Received in revised form strategy using Ce(NO ) $6H O containing phenol-formaldehyde (PF) resol or/and sucrose as 3 3 2 31 December 2012 the ceria precursor. The resulting CeO2 samples were characterized by N2 adsorption- Accepted 17 January 2013 desorption analysis, scanning electron microscopy, transmission electron microscopy Available online 5 March 2013 and X-ray diffraction, which showed that the hierarchical 3DOM CeO2 possessed inter- connected networks of the ordered macropore structures with large mesopores, and both Keywords: the BET surface area and pore volume increased significantly compared with

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