Precursor induced synthesis of hierarchical nanostructured ZnO.
As-synthesized ZnO nanostructures with a bladed bundle-like architecture have been fabricated from a flower-like precursor ZnO.0.33ZnBr(2).1.74H(2)O via a mechanism of dissolution-recrystallization. Experimental conditions, such as initial reactants and reaction time, are examined. The results show that no bladed bundle-like ZnO hierarchical nanostructures can be obtained by using the same molar amount of other zinc salts, such as ZnBr(2), instead of the flower-like ZnO.0.33ZnBr(2).1.74H(2)O precursor, and keeping other conditions unchanged. The products were characterized by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The ZnO nanostructures are mainly composed of nanowires with a diameter around 40-50 nm and length up to 1.5-2.5 microm. Meanwhile, ZnO nanoflakes with a thickness of about 4-5 nm attached to the surface of ZnO nanowires with a preferred radially aligned orientation. Furthermore, the photoluminescence (PL) measurements exhibited the unique white-light-emitting characteristic of hierarchical ZnO nanostructures. The emission spectra cover the whole visible region from 380 to 700 nm.
Yu
Shiyong
S
Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, and Graduate School of the Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
Wang
Cheng
C
Yu
Jiangbo
J
Shi
Weidong
W
Deng
Ruiping
R
Zhang
Hongjie
H