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Ordered mesoporous crystalline aluminas from self-assembly of ABC triblock terpolymer-butanol-alumina sols

机译:来自ABC Triblock Terpolymer-丁醇 - 氧化铝溶胶的自组装的订购介孔晶体氧化物

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摘要

A one-pot synthesis approach is described to generate ordered mesoporous crystalline gamma-alumina-carbon composites and ordered mesoporous crystalline gamma-alumina materials via the combination of soft and hard-templating chemistries using block copolymers as soft structure-directing agents. Periodically ordered alumina hybrid mesostructures were generated by self-assembly of a poly(isoprene)-block-poly(styrene)-block-poly(ethylene oxide) terpolymer, n-butanol and aluminum tri-sec-butoxide derived sols in organic solvents. The triblock terpolymer was converted into a rigid carbon framework during thermal annealing under nitrogen to support and preserve the ordered mesoporous crystalline gamma-alumina-carbon composite structures up to 1200 degrees C. The carbon matrix was subsequently removed in a second heat treatment in air to obtain ordered mesoporous crystalline gamma-alumina structures. Such thermally stable, highly crystalline, and periodically ordered mesoporous ceramic and ceramic-carbon composite materials may be promising candidates for various high temperature catalysis, separation, and energy-related applications.
机译:描述了一种单釜合成方法来产生的有序中孔结晶γ-氧化铝 - 碳复合物和经由使用嵌段共聚物作为软结构导向剂软和硬模板化化学的组合有序中孔结晶γ-氧化铝材料。周期性地有序通过自组装的聚生成的氧化铝的混合的介孔结构(异戊二烯) - 嵌段 - 聚(苯乙烯) - 嵌段 - 聚(环氧乙烷)三元共聚物,正丁醇和铝,三仲丁氧基衍生的在有机溶剂中的溶胶。三嵌段三元共聚物在氮气下热退火时转化成一刚性碳框架支撑和保持有序中孔结晶γ-氧化铝 - 碳复合结构高达1200摄氏度的碳基体中的第二热处理随后除去在空气中获得有序的中孔结晶γ-氧化铝结构。这样热稳定的,高度结晶的,和周期性地有序中孔陶瓷和陶瓷 - 碳复合材料可以被希望用于各种高温催化,分离和能量相关的应用程序的候选者。

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