Biotemplated fabrication of hierarchical mesoporous CeO_2 derived from diatom and its application for catalytic oxidation of CO  

作　　者：Junchao Qian Zhigang Chen Chengbao Liu Fang Wang Yuzhu Zhang Mengmeng Wang 

机构地区：[1]Department of Material Science and Engineering, Jiangsu University [2]Jiangsu Key Laboratory for Environment Functional Materials,Suzhou University of Science and Technology [3]School of Chemistry, Biology and Materials Engineering,Suzhou University of Science and Technology [4]Department of Materials Science and Engineering, Changzhou University

出　　处：《Chinese Science Bulletin》2014年第26期3260-3265,共6页

基　　金：supported by the National Natural Science Foundation of China (21071107, 21277094, 21103119);Production and Research Collaborative Innovation Project of Jiangsu Province (BY2012123);Natural Science Foundation of Jiangsu Province (BK2012167);Science and Technology Pillar Program (Industry) of Jiangsu Province (BE2012101);Collegiate Natural Science Fund of Jiangsu Province (12KJA430005, 11KJB430012);Jiangsu Key Laboratory for Photon Manufacturing (GZ201111);Jiangsu Provincial Key Laboratory for Interventional Medical Devices (Jr1210);Science and Technology Pillar Program (Industry) of Changzhou (CE20120067);Creative Project of Postgraduate of Jiangsu Province(CXLX12_0635).

摘　　要：Hierarchically hollow nanostructures have been the focus of numerous studies due to their prominent physicochemical properties that differ significantly from bulk materials and their potential for extensive applications. We present a novel diatom-based scaffold for the synthesis of hierarchically biomorphic CeO2 with special porous structure via incorporating Ce ions into the frustule.Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and nitrogen adsorption-desorption measurements were adopted to characterize the products. Owing to its unique hierarchical structure and periodic meso-macro scale features, the obtained CeO2 exhibits high catalytic activity in CO oxidation. This facile strategy may design a new way towards replicating desired biological structures for metal oxide catalyst in other potential applications.Hierarchically hollow nanostructures have been the focus of numerous studies due to their prominent physicochemical properties that differ significantly from bulk materials and their potential for extensive applications. We present a novel diatom-based scaffold for the synthesis of hierarchically biomorphic CeO2 with special porous structure via incorporating Ce ions into the frustule. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and nitrogen adsorption-desorption measure- ments were adopted to characterize the products. Owing to its unique hierarchical structure and periodic meso-macro scale features, the obtained CeO2 exhibits high catalytic activity in CO oxidation. This facile strategy may design a new way towards replicating desired biological structures for metal oxide catalyst in other potential applications.

关 键 词：CO氧化 氧化铈 应用 催化氧化 硅藻 X射线光电子能谱法 金属氧化物催化剂 扫描电子显微镜 

分 类 号：TB383.4[一般工业技术—材料科学与工程]