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    In situ crystallization of b-oriented MFI films on plane and curved substrates coated with a mesoporous silica layer

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    Type
    Article
    Authors
    Deng, Zhiyong
    Pera-Titus, Marc
    Date
    2013-05
    Permanent link to this record
    http://hdl.handle.net/10754/598591
    
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    Abstract
    A simple and reproducible method is presented for preparing b-oriented MFI films on plane (disc) and curved (hollow fiber) supports by in situ hydrothermal synthesis. A mesoporous silica (sub-)layer was pre-coated on the supports by dip coating followed by a rapid thermal calcination step (973 K during 1 min) to reduce the number of grain boundaries while keeping the hydrophilic behavior of silica. The role of the silica sub-layer is not only to smoothen the substrate surface, but also to provide a silica source to promote the nucleation and growth of zeolite crystals via a heterogeneous nucleation mechanism (zeolitization), and adsorb zeolite moieties generated in the synthesis solution via a homogeneous nucleation mechanism. A monolayer of b-oriented MFI crystals was obtained on both supports after 3 h synthesis time with a moderate degree of twinning on the surface. © 2013 Elsevier Ltd.
    Citation
    Deng Z, Pera-Titus M (2013) In situ crystallization of b-oriented MFI films on plane and curved substrates coated with a mesoporous silica layer. Materials Research Bulletin 48: 1874–1880. Available: http://dx.doi.org/10.1016/j.materresbull.2013.01.020.
    Sponsors
    Z.D. would like to acknowledge Dr. Bo Wang from KAUST for providing the YSZ hollow fibers and for the helpful comments in the preparation of this manuscript.
    Publisher
    Elsevier BV
    Journal
    Materials Research Bulletin
    DOI
    10.1016/j.materresbull.2013.01.020
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.materresbull.2013.01.020
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