Mesoporous Carbon/Zirconia Composites: A Potential Route to Chemically Functionalized Electrically-Conductive Mesoporous Materials

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• 作者：Jung-Min Oh ; Amar S. Kumbhar ; Olt Geiculescu ; Stephen E. Creager
• 刊名：Langmuir
• 出版年：2012
• 出版时间：February 14, 2012
• 年：2012
• 卷：28
• 期：6
• 页码：3259-3270
• 全文大小：731K
• 年卷期：v.28,no.6(February 14, 2012)
• ISSN：1520-5827

文摘

Mesoporous nanocomposite materials in which nanoscale zirconia (ZrO₂) particles are embedded in the carbon skeleton of a templated mesoporous carbon matrix were prepared, and the embedded zirconia sites were used to accomplish chemical functionalization of the interior surfaces of mesopores. These nanocomposite materials offer a unique combination of high porosity (e.g., 84% void space), electrical conductivity, and surface tailorability. The ZrO₂/carbon nanocomposites were characterized by thermogravimetric analysis, nitrogen-adsorption porosimetry, helium pychnometry, powder X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Comparison was made with templated mesoporous carbon samples prepared without addition of ZrO₂. Treatment of the nanocomposites with phenylphosphonic acid was undertaken and shown to result in robust binding of the phosphonic acid to the surface of ZrO₂ particles. Incorporation of nanoscale ZrO₂ surfaces in the mesoporous composite skeleton offers unique promise as a means for anchoring organophosphonates inside of pores through formation of robust covalent Zr鈥揙鈥揚 bonds.