Intergrowth Structure of Zeolite Crystals as Determined by Optical and Fluorescence Microscopy of the Template‐Removal Process

Karwacki, Łukasz; Stavitski, Eli; Kox, Marianne H. F.; Kornatowski, J.; Weckhuysen, Bert M.

doi:10.1002/anie.200702012

Cited by 122 publications

(96 citation statements)

References 31 publications

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“…The pore dimension between MFI and MEL is almost the same and the formation of intergrowth zeolitic structure is possible. The structure of ZSM-5/ZSM-11 intergrowth zeolites has been characterized by HREM [28][29][30][31][32], X-ray diffraction [33] and Fluorescence Microscopy [34,35]. The structure segment of ZSM-5/ZSM-11 is made up of inversion center of MFI and mirror symmetry of MEL connecting with pentasil chains.…”

Section: Introductionmentioning

confidence: 99%

Conversion of Methanol to Hydrocarbons over Phosphorus-modified ZSM-5/ZSM-11 Intergrowth Zeolites

et al. 2009

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The phosphorus-modified ZSM-5/ZSM-11 intergrowth zeolites has been used for the catalytic conversion of methanol to hydrocarbons. As evidenced by MAS NMR and NH 3 -TPD, the modification by phosphorus leads a distinct decrease of the BrØnsted acid sites and the acid strength of the catalysts in comparison with the parent ZSM-5/ZSM-11, which causes a dramatic improvement of the selectivity towards propylene. At 400°C, the ratio of propylene to ethylene can reach about 8.0. A comparison with the conventional ZSM-5 zeolite has been also carried out in the present study.

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Section: Introductionmentioning

confidence: 99%

Conversion of Methanol to Hydrocarbons over Phosphorus-modified ZSM-5/ZSM-11 Intergrowth Zeolites

et al. 2009

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“…Consequently, individual zeolite crystals differ in their overall material accessibility and related catalytic behavior. [23][24][25] Here, we describe for the first time the powerful combination of focused ion beam (FIB) and scanning electron microscopy (SEM) tomography to characterize porous solids, such as zeolites. As will be shown below, the approach leads to new quantitative insight into the type of mesopores (length, width, and morphology) generated in steamed zeolites.…”

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confidence: 99%

Architecture‐Dependent Distribution of Mesopores in Steamed Zeolite Crystals as Visualized by FIB‐SEM Tomography

et al. 2011

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“…Karawacki et al showed that the decomposition of template molecules in zeolite-type crystals yields light-absorbing and fluorescent intermediates, which they used to elucidate the 3-dimensional intergrowth structure by means of in-situ optical and fluorescence microscopy during heating [75]. In another study, also by Karawacki et al, the authors related the intergrowth structure of zeolites to internal and outer-surface molecular diffusion barriers [76].…”

Section: Diffusion Phenomena Morphology Intergrowth and Accessibilimentioning

confidence: 99%

Review. Fluorescence Microscopy Studies of Porous Silica Materials

Rühle

Davies

Bein

et al. 2013

Zeitschrift Für Naturforschung B

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In this article, we discuss how fluorescence microscopy techniques are used to investigate important characteristics of porous silica materials. We start with a discussion of the synthesis, formation mechanism and functionalization of these materials. We then give an introduction to single molecule microscopy and show how this technique can be used to gain deeper insights into some defining properties of porous silica, such as pore structure, host-guest interactions and diffusion dynamics. We also provide examples from the literature demonstrating how fluorescence microscopy is used for elucidating important aspects of porous silica materials and heterogeneous catalysis, e. g. diffusion properties, reactivity, morphology, intergrowth, accessibility, and catalyst deactivation. Finally, a short outlook on the scope of porous silica hosts in drug delivery applications is given.

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Intergrowth Structure of Zeolite Crystals as Determined by Optical and Fluorescence Microscopy of the Template‐Removal Process

Cited by 122 publications

References 31 publications

Conversion of Methanol to Hydrocarbons over Phosphorus-modified ZSM-5/ZSM-11 Intergrowth Zeolites

Conversion of Methanol to Hydrocarbons over Phosphorus-modified ZSM-5/ZSM-11 Intergrowth Zeolites

Architecture‐Dependent Distribution of Mesopores in Steamed Zeolite Crystals as Visualized by FIB‐SEM Tomography

Review. Fluorescence Microscopy Studies of Porous Silica Materials

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