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Hierarchical ZnO films with microplate/nanohole structures induced by precursor concentration and colloidal templates, their superhydrophobicity, and enhanced photocatalytic performance

Published online by Cambridge University Press:  03 July 2013

Zhigang Li
Affiliation:
Department of Physics & Electronic Engineering, Taizhou University, Taizhou, Zhejiang 318000, China
Guotao Duan
Affiliation:
Key Laboratory of Materials Physics and School of Materials Science and Engineering, Institute of Solid State Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Chinese Academy of Sciences, Hefei 230031, Anhui, China
Guangqiang Liu
Affiliation:
Key Laboratory of Materials Physics and School of Materials Science and Engineering, Institute of Solid State Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Chinese Academy of Sciences, Hefei 230031, Anhui, China
Zhengfei Dai
Affiliation:
Key Laboratory of Materials Physics and School of Materials Science and Engineering, Institute of Solid State Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Chinese Academy of Sciences, Hefei 230031, Anhui, China
Jinlian Hu
Affiliation:
School of Materials Science and Engineering, Anhui University of Technology, Ma-An-Shan 243002, Anhui, China
Weiping Cai
Affiliation:
Key Laboratory of Materials Physics and School of Materials Science and Engineering, Institute of Solid State Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Chinese Academy of Sciences, Hefei 230031, Anhui, China
Yue Li*
Affiliation:
Key Laboratory of Materials Physics and School of Materials Science and Engineering, Institute of Solid State Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Chinese Academy of Sciences, Hefei 230031, Anhui, China
*
a)Address all correspondence to this author. e-mail: yueli@issp.ac.cn
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Abstract

A facile inexpensive route has been developed to prepare ZnO hierarchical materials with microplate/nanohole structures based on the colloidal monolayer template by the precursor thermal decomposition. These hierarchical structured materials demonstrated an excellent superhydrophobicity with self-cleaning effect and an enhanced photocatalytic performance to organic molecules, which are attributed to big roughness and large surface area of such special hierarchical structures. The formation mechanism of such hierarchical structures was investigated in detail by tracing morphology changing at different precursor concentrations. At high precursor concentration, both incompletely restricted ZnO growth of colloidal templates and preferable growth of microplates take place at the same time, and hence, ZnO hierarchical materials with microplate/nanohole structures are formed. With increasing precursor concentration, the number density of ZnO microplates tends to be larger. The large number density of ZnO microplates and holes on the microplates render the sample a large surface area and surface roughness, leading to good superhydrophobicity and photocatalytic activity. Such hierarchical ZnO micro/nanostructured materials have important applications in environmental science, microfluidic devices, etc.

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Articles
Copyright
Copyright © Materials Research Society 2013 

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Hierarchical ZnO films with microplate/nanohole structures induced by precursor concentration and colloidal templates, their superhydrophobicity, and enhanced photocatalytic performance
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