Fabrication of flower-shaped Bi2O3 superstructure by a facile template-free process

被引:74
作者
Zhang, Li [2 ]
Hashimoto, Yoshio [2 ]
Taishi, Toshinori [2 ]
Nakamura, Isao [1 ]
Ni, Qing-Qing [1 ]
机构
[1] Shinshu Univ, Dept Funct Machinery & Mech, Ueda, Nagano 3868567, Japan
[2] Shinshu Univ, Fac Engn, Ueda, Nagano 3868567, Japan
关键词
Bi2O3; Superstructure; Hydrothermal; PHOTOCATALYTIC ACTIVITY; MAGNETIC-PROPERTIES; HOLLOW SPHERES; PHOTOLUMINESCENCE; MICROSPHERES; PERFORMANCE; OXIDATION; GROWTH; CARBON; CAVITY;
D O I
10.1016/j.apsusc.2011.02.081
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel flower-shaped Bi2O3 superstructure has been successfully synthesized by calcination of the precursor, which was prepared via a citric acid assisted hydrothermal process. The precursor and Bi2O3 were characterized with respect to morphology, crystal structure and elemental chemical state by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It was shown that both the precursor and Bi2O3 flower-shaped superstructure were constructed of numerous nanosheets while the nanosheets consisted of a great deal of nanoparticles. Furthermore, key factors for the formation of the superstructures have been proposed; a mechanism for the growth of the superstructure has been presented based on the FESEM investigation of different growth stages. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码:6577 / 6582
页数:6
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