In situ atomic force microscopy of zeolite A dissolution

L. Itzel Meza, Michael W. Anderson, Ben Slater, Jonathan R. Agger

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In the present study, the {100} surface of zeolite A was exposed to a range of solutions and the response was monitored in real-time by means of atomic force microscopy (AFM). The zeolite dissolves by a well-defined layer process that is characterised by uncorrelated dissolution of units that are structurally unconnected and terrace retreat when building units are inter-connected. This process was observed to be coupled with the formation of nano-squares that are stabilized at the zeolite surface for a period before complete dissolution. Theoretical work suggests that three terminating structures are central to understanding the dissolution mechanism. Stripping the surface of the secondary building unit, the single 4-ring, is predicted to be a rate-determining step in dissolution, but this process occurs by removing monomeric rather than oligomeric units. © the Owner Societies.
    Original languageEnglish
    Pages (from-to)5066-5076
    Number of pages10
    JournalPhysical Chemistry Chemical Physics
    Volume10
    Issue number33
    DOIs
    Publication statusPublished - 2008

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