Facile Fabrication and Enhanced Sensing Properties of Hierarchically Porous CuO Architectures

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• 作者：Guoxing Zhu ; Huan Xu ; Yunyun Xiao ; Yuanjun Liu ; Aihua Yuan ; Xiaoping Shen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：February 22, 2012
• 年：2012
• 卷：4
• 期：2
• 页码：744-751
• 全文大小：494K
• 年卷期：v.4,no.2(February 22, 2012)
• ISSN：1944-8252

文摘

Hierarchically porous CuO architectures were successfully fabricated via copper basic carbonate precursor obtained with a facile hydrothermal route. The shape of the precursor is preserved after its conversion to porous CuO architectures by calcination. The obtained CuO are systemically characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and Brunauer鈥揈mmett鈥揟eller N₂ adsorption鈥揹esorption analysis. The results reveal that hierarchical CuO microspheres are monoclinic structure and are assembled by porous single-crystal sub-microplatelets. The Brunauer鈥揈mmett鈥揟eller N₂ adsorption鈥揹esorption analysis indicates that the obtained CuO has a surface area of 12.0 m²/g with pore size of around 30 nm. The gas sensing performance of the as-prepared hierarchical CuO microspheres were investigated towards a series of typical organic solvents and fuels. They exhibit higher sensing response than that of commercial CuO powder. Their sensing properties can be further improved by loading of Ag nanoparticles on them, suggesting their potential applications in gas sensors.

Keywords:

CuO; Gas sensor; hierarchical structure; Ag-CuO; porous structure