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美國布魯克海文儀器公司>技術文章> Mesostructure of Mesoporous Silica/Anodic Alumina Hierarchical Membranes Tuned with Ethanol

技術文章

Mesostructure of Mesoporous Silica/Anodic Alumina Hierarchical Membranes Tuned with Ethanol

閱讀:233          發(fā)布時間:2018-3-29

作者 Silo Meoto , Niall Kent, Michael M. Nigra†, and Marc-Olivier Coppens*

Department of Chemical Engineering, University College London, Torrington Place, London, United Kingdom WC1E 7JE

 

摘要:Hierarchically structured membranes composed of mesoporous silica embedded inside the channels of anodic alumina (MS-AAM) were synthesized using the aspiration method. Ethanol is shown to have a significant effect on the type and organization of the mesoporous silica phase. Detailed textural analysis revealed that the pore size distribution of the mesoporous silica narrows and the degree of ordering increases with decreasing ethanol concentration used in the synthesis mixture. The silica mesopores were synthesized with pores as small as 6 nm in diameter, with the channel direction oriented in lamellar, circular, and columnar directions depending on the ethanol content. This study reveals ethanol concentration as a key factor behind the synthesis of an ordered mesoporous silica–anodic alumina membrane that can increase its functionality for membrane-based applications.

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