Oriented growth of molecular sieves on inorganic membranes


  • We are grateful to Dr. T. Sheu and Mr. M. I. Shy (Materials Science Center of Tsinghua University) for the Fourier transform image analysis of SEM micrographs. This work was supported in part by the National Science Council of the Republic of China.


A molecular sieve film with vertically oriented and closely packed crystals has been prepared by a novel method. The Figure shows VAP4-5 (zeolite-like) crystals anchored inside the straight channel walls of an anodic alumina membrane. The novel method of synthesis is outlined and the effect of varying the growth conditions, e.g., temperature, solution dilution, chemical composition, reactant source, described.

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