CuO Nanoparticles from the Strongly Hydrated Ionic Liquid Precursor (ILP) Tetrabutylammonium Hydroxide: Evaluation of the Ethanol Sensing Activity

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• 作者：Andreas Taubert ; Franziska Stange ; Zhonghao Li ; Mathias Junginger ; Christina G眉nter ; Mike Neumann ; Alwin Friedrich
• 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：791-795
• 全文大小：326K
• 年卷期：v.4,no.2(February 22, 2012)
• ISSN：1944-8252

文摘

The sensing potential of CuO nanoparticles synthesized via precipitation from a water/ionic liquid precursor (ILP) mixture was investigated. The particles have a moderate surface area of 66 m²/g after synthesis, which decreases upon thermal treatment to below 5 m²/g. Transmission electron microscopy confirms crystal growth upon annealing, likely due to sintering effects. The as-synthesized particles can be used for ethanol sensing. The respective sensors show fast response and recovery times of below 10 s and responses greater than 2.3 at 100 ppm of ethanol at 200 掳C, which is higher than any CuO-based ethanol sensor described so far.

Keywords:

ionic liquids; ionic liquid precursors; tetrabutylammonium hydroxide; nanoparticles; CuO; gas sensing