Synthesis of ordered macro-mesoporous Mg-Al composite oxides with high thermal stability and mechanical strength

Synthesis of ordered macro-mesoporous Mg-Al composite oxides with high thermal stability and mechanical strength
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高热稳定性和机械强度有序大介孔镁铝复合氧化物的合成

DOI:
10.1016/j.matlet.2018.04.068
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发表时间:
2018-08
期刊:
影响因子:
3
通讯作者:
Li Ruifeng
Li Ruifeng
中科院分区:
材料科学3区
文献类型:
--
作者:
Pan Dahai;Chen Wei;Yu Feng;Chen Shuwei;Yan Xiaoliang;Shi Xiufeng;Fan Binbin;Li Ruifeng

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以三嵌段共聚物F127和聚苯乙烯胶体晶体为模板,采用受限蒸发诱导自组装法合成了大孔尺寸可调、Mg分布高度均匀的有序大孔-介孔Mg-Al复合氧化物(OMM-MA-x)。所得的OMM-MA-x材料表现出更有序的二维六方介孔结构,构成有序大孔的壁骨架和更优异的织构性能比那些有序的大-介孔氧化铝材料。更重要的是,OMM-MA-x的有序介孔结构和大孔结构即使在900 °C的热处理或在15 MPa的压力处理后也可以很好地保持。
Ordered macro-mesoporous Mg-Al composite oxides (denoted as OMM-MA-x) with tunable macropore size and highly homogenous distribution of Mg have been synthesized via a confined evaporation induced self-assembly method, in which triblock copolymer F127 and polystyrene colloidal crystals are utilized as templates for ordered mesoporous and macroporous structures, respectively. The resultant OMM-MA-x materials exhibit a much more ordered 2D hexagonal mesostructure constituting wall skeleton of ordered macropores and more excellent textural properties than those of ordered macro-mesoporous alumina materials. More importantly, both ordered mesostructure and macroporous structure of OMM-MA-x can be well maintained even after thermal treatment at 900 °C or pressure treatment at 15 MPa.
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