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• 2018-11-22 20:15發(fā)布了問答

  Micrometer-Sized Mesoporous Silica Spheres Grown幫翻譯下

  Introduction The discovery of the M41S family of mesoporous silicas1，2 has stimulated wide interest in the surfactanttemplated synthesis of mesoporous materials because of their potential applications as versatile catalysts， catalyst s... Introduction The discovery of the M41S family of mesoporous silicas1，2 has stimulated wide interest in the surfactanttemplated synthesis of mesoporous materials because of their potential applications as versatile catalysts， catalyst supports， separation media， and hosts for clusters and nanowires. Mesoporous silica molecular sieves have been prepared by ionic1-4 and neutral5，6 surfactant templating pathways; however， the obtained mesoporous silicas normally yield irregular agglomerates consisting of a wide particle size distribution.7 Because the control of the particle morphology and size of mesoporous silicas could open up new possibilities for the application of mesoporous silicas as a packing material in chromatography or as an easy-to-handle form for catalytic purposes， some recent efforts have been devoted to the synthesis of mesoporous silica spheres of defined size. For example， millimeter-sized mesoporous silica spheres ranging from 0.1 to 2 mm in size8 and submicrometer-sized mesoporous silica spheres ranging from 0.4 to 1.1 ím in size9 have been synthesized under stirred basic conditions by modified cationic surfactant templating routes. However， further efforts are required toward the synthesis of micrometer-sized mesoporous silica spheres， which could be directly used in high-performance liquid chromatography (HPLC) and related separation techniques.9 展開

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• 2018-11-20 11:46發(fā)布了問答

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• 2017-01-21 07:18發(fā)布了問答

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• 2010-11-26 09:56發(fā)布了問答

  請問分子篩屬何種催化劑，主要應(yīng)用在哪些領(lǐng)域。

  　

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• 2010-06-05 04:37發(fā)布了問答

  如何做5%的鈀碳催化劑

  　

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