China rose petal as biotemplate to produce two-dimensional ceria nanosheets

China rose petal was used as robust biotemplate for the facile fabrication of novel ceria nanosheet with a thickness of about 7 nm via a continuous infiltration process. The presence of well-resolved peaks ([111], [200], [220], and [311]) for the products revealed the formation of the fluorite-struc...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2011-12, Vol.13 (12), p.7149-7158
Main Authors: Qian, Junchao, Chen, Feng, Zhao, Xiaobing, Chen, Zhigang
Format: Article
Language:English
Subjects:
Cerium oxide
Characterization and Evaluation of Materials
Chemistry and Materials Science
China
Emissions
Fabrication
Inorganic Chemistry
Lasers
Materials Science
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Nanotechnology
Optical Devices
Optics
Petals
Photonics
Physical Chemistry
Research Paper
Scanning electron microscopy
Surface chemistry
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Summary:China rose petal was used as robust biotemplate for the facile fabrication of novel ceria nanosheet with a thickness of about 7 nm via a continuous infiltration process. The presence of well-resolved peaks ([111], [200], [220], and [311]) for the products revealed the formation of the fluorite-structured CeO 2 . The detailed characterization by field-emission scanning electron microscope (FESEM), field-emission transmission electron microscope (FETEM), and atomic force microscopy (AFM) exhibited the biomorphic structure of polycrystalline ceria film with the nanoparticle size of ca. 6.98 nm. Based on the surface chemistry and biochemistry processes, a possible mechanism for the formation of CeO 2 nanosheets is proposed. Furthermore, nitrogen adsorption–desorption measurement and photoluminescence spectrum (PL) were employed to characterize the samples. The ceria nanosheet showed the existence of mesopores (pores 2–4 nm diameter) on its surface and a broad emission ranging from 350 to 500 nm in photoluminescence spectrum. X-ray photoelectron spectroscopy analysis (XPS) confirmed that the mesoporous nanosheets possessed more surface vacancies than the bulk CeO 2 ; hence these hierarchical CeO 2 layers appear to be potential candidates for catalytic applications.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-011-0626-2