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首页> 外文期刊>Langmuir >Mesoporous Carbon/Zirconia Composites: A Potential Route to Chemically Functionalized Electrically-Conductive Mesoporous Materials
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Mesoporous Carbon/Zirconia Composites: A Potential Route to Chemically Functionalized Electrically-Conductive Mesoporous Materials

机译:介孔碳/氧化锆复合材料:化学功能化介电介孔材料的潜在途径

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摘要

Mesoporous nanocomposite materials in whichnnanoscale zirconia (ZrO2) particles are embedded in the carbonnskeleton of a templated mesoporous carbon matrix werenprepared, and the embedded zirconia sites were used tonaccomplish chemical functionalization of the interior surfaces ofnmesopores. These nanocomposite materials offer a uniquencombination of high porosity (e.g., ∼84% void space), electricalnconductivity, and surface tailorability. The ZrO2/carbon nanocompositesnwere characterized by thermogravimetric analysis,nnitrogen-adsorption porosimetry, helium pychnometry, powdernX-ray diffraction, Raman spectroscopy, scanning electronnmicroscopy, transmission electron microscopy, and X-ray photoelectronnspectroscopy. Comparison was made with templated mesoporous carbon samples prepared without addition of ZrO2.nTreatment of the nanocomposites with phenylphosphonic acid was undertaken and shown to result in robust binding of thenphosphonic acid to the surface of ZrO2 particles. Incorporation of nanoscale ZrO2 surfaces in the mesoporous compositenskeleton offers unique promise as a means for anchoring organophosphonates inside of pores through formation of robustncovalent Zr−O−P bonds.
机译:制备了介孔纳米复合材料,其中在模板化的介孔碳基体的碳骨架中嵌入了纳米级氧化锆(ZrO2)颗粒,并利用嵌入的氧化锆位点完成了纳米孔内表面的化学功能化。这些纳米复合材料提供了高孔隙率(例如约84%的空隙空间),导电性和表面可定制性的独特组合。通过热重分析,氮吸附孔隙率法,氦比重法,粉末X射线衍射,拉曼光谱,扫描电子显微镜,透射电子显微镜和X射线光电子能谱对ZrO2 /碳纳米复合材料进行了表征。与未添加ZrO2的模板化介孔碳样品进行了比较。n用苯基膦酸处理了纳米复合材料,结果表明,膦酸酯与ZrO2颗粒的表面牢固结合。在介孔复合骨架中掺入纳米级ZrO2表面提供了独特的前景,作为通过形成坚固的共价Zr-O-P键将有机膦酸酯固定在孔内的一种手段。

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