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

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Abstract

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 CeO2. 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 CeO2 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 CeO2; hence these hierarchical CeO2 layers appear to be potential candidates for catalytic applications.

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Abbreviations

2D:

Two-dimensional

3D:

Three-dimensional

XRD:

Powder X-ray diffraction

AFM:

Atomic force microscopy

FESEM:

Field-emission scanning electron microscope

TEM:

Transmission electron microscope

FETEM:

Field-emission transmission electron microscope

PL:

Photoluminescence spectrum

XPS:

X-ray photoelectron spectroscopy

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Acknowledgments

The authors would like to thank Shanghai Institute of Ceramics, Chinese Academy of Sciences for providing FETEM and FESEM facilities. This study is supported by National Natural Science Foundation of China (21071107) and Provincial Science Foundation of Jiangsu (BK2008541).

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Authors and Affiliations

  1. Department of Material Science and Engineering, Jiangsu University, 212013, Zhenjiang, People’s Republic of China

    Junchao Qian, Feng Chen, Xiaobing Zhao & Zhigang Chen

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  1. Junchao Qian
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  2. Feng Chen
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  3. Xiaobing Zhao
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Correspondence to Zhigang Chen.

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Qian, J., Chen, F., Zhao, X. et al. China rose petal as biotemplate to produce two-dimensional ceria nanosheets. J Nanopart Res 13, 7149–7158 (2011). https://doi.org/10.1007/s11051-011-0626-2

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  • DOI: https://doi.org/10.1007/s11051-011-0626-2

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