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Ceria Hollow Nanospheres Synthesized by Hydrothermal Method and Their Adsorption Capacity |
ZHANG Jiao, JIANG Xueliang**( ), YU Lu, CHEN Jiangtao |
School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China |
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Cite this article:
ZHANG Jiao, JIANG Xueliang, YU Lu, CHEN Jiangtao. Ceria Hollow Nanospheres Synthesized by Hydrothermal Method and Their Adsorption Capacity. Chinese Journal of Materials Research, 2016, 30(5): 365-371.
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Abstract Uniform-sized and monodisperse ceria (CeO2) hollow nanospheres were synthesized in a ethylene glycol aqueous solution with cerium nitrate hexahydrate (Ce(NO3)3·6H2O) as cerium sources and polyvinylpyrrolidone (PVP) as surfactant. The synthesized products were characterized by means of Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectrum (XPS), X-ray diffraction (XRD), N2 adsorption-desorption and UV-Vis. The results show that the porous CeO2 hollow nanospheres composed of small nanoparticles with cubic fluorite structure; the average diameter and wall thickness of the CeO2 hollow nanospheres were about 400nm and 30 nm respectively; they have a high specific surface area of 76.86 m2g-1 and BJH pore size about 3~5 nm. On the basis of time-dependent experiment, the relevant formation mechanism was proposed. The ceria hollow nanospheres show an excellent adsorption rate about 70% of heavy metal ions at room temperature for Cr(VI) solutions, which is 3 times higher than that of ceria powder.
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Received: 04 August 2015
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Fund: *Supported by National Natural Science Foundation of China No.51273154, the Natural Science Foundation of Hubei No.2011CBD220, the Graduate Student Education Innovation Foundation of Wuhan Institute of Technology No.CX2014064 |
About author: **To whom correspondence should be addressed, Tel: 15802730640, E-mail: sjtujxl@163.com |
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