Journal
APPLIED SURFACE SCIENCE
Volume 347, Issue -, Pages 73-78Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.04.060
Keywords
Flower-like; WO3 center dot H2O; Hierarchical architectures; Gas-sensing
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Funding
- National Natural Science of China [51202302, 11332013]
- Postdoctoral Science Funded Project of Chongqing [Xm201301]
- Chongqing Graduate Student Research Innovation Project [CYS14011]
- Fundamental Research Funds for the Central Universities [106112015CDJXY130013]
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Hierarchical architectures consisting of two-dimensional (2D) nanostructures are of great interest for potential use in recent year. Here, we report the successful synthesis of four hierarchical tungsten oxide flower-like architectures via a simple yet facile hydrothermal method. The as-prepared WO3 center dot H2O hierarchical architectures are in fact assembled with numerous nanosheets or nanoplates. Through a comprehensive characterization of microstructures and morphologies of the as-prepared products, we find that petal thickness is a key factor for affecting gas-sensing performances. We further propose a possible growth mechanism for the four flower-like architectures. Moreover, gas-sensing measurements showed that the well-defined sheet-flower WO3 center dot H2O hierarchical architectures exhibited the excellent gas-sensing properties to ethanol owing to their largest amount of thin petal structures and pores. (C) 2015 Elsevier B.V. All rights reserved.
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