Nonthermal Synthesis of Three-Dimensional Metal Oxide Structures under Continuous-Flow Conditions and Their Catalytic Applications

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• 作者：Cecil K. King鈥檕ndu ; Naftali N. Opembe ; Homer C. Genuino ; Hector F. Garces ; Eric C. Njagi ; Aparna Iyer ; Hui Huang ; Saminda Dharmarathna ; Steven L. Suib
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：December 1, 2011
• 年：2011
• 卷：115
• 期：47
• 页码：23273-23282
• 全文大小：1093K
• 年卷期：v.115,no.47(December 1, 2011)
• ISSN：1932-7455

文摘

Continuous-flow synthesis of one-dimensional (1D) metal oxide nanostructures and/or their integration into hierarchical structures under nonthermal conditions is still a challenge. In this work, a nonthermal, continuous-flow approach for the preparation of 纬-manganese oxide (纬-MnO₂) and cerium oxide (CeO₂) microspheres has been developed. By this technique, 纬-MnO₂ materials with surface areas of 240, 98, and 87 m²/g and CeO₂ microspheres with a surface area of 1 m²/g have been fabricated successfully. Characterization of the materials was carried out using powder X-ray diffraction, infrared and inductively coupled plasma optical emission spectrometer (ICP/OES), nitrogen sorption, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The synthesized materials showed good catalytic activity in the oxidation of 伪-methyl styrene.