Synthesis of ZnO nanoflowers and their wettabilities
and photocatalytic properties
Xiaodong Guo,1, 2
1
*
Lars Egil Helseth, 1 Bodil Holst, 1 Quanzhong Zhao 2
Department of Physics and Technology, University of Bergen, Allégaten 55, 5007 Bergen, Norway
2
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Shanghai 201800, China
Abstract:
By employing hydrothermal growth, we demonstrate the growth of
three-dimensional flowerlike ZnO nanostructures from aqueous solution. Our approach
offers synthetic flexibility in controlling film architecture, coating texture and crystallite
size. The wettability is studied by measurement of time-dependent contact angles in the
as-grown samples. In addition, superior photocatalytic activity of the flowerlike ZnO
nanostructures in the degradation of Rhodamine B is investigated as well. The influence
factors and formation mechanism of the flowerlike ZnO nanostructures are also analyzed
and discussed.
Figure 1. FE-SEM images of ZnO flowerlike nanostructures (a) single flower, (b) flower with different
size, (c) flower matrix, (d) continuous line-mode structures, (e) ZnO grid , (f) EDX analysis took from the
flower petals, and the substrate (the inset), respectively.
References:
1. X. D. Guo, et al.. Synthesis of ZnO nanoflowers and their wettabilities and photocatalytic
properties. Optics Express, 18, 18401 (2010)
2. X. D. Guo, et al.. Controllable growth of flowerlike ZnO nanostructures by combining laser
direct writing and hydrothermal synthesis, Materials Letters, 66, 377 (2012)
*
Corresponding author: xiaodong.guo@ift.uib.no