1. Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study
- Author
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Smilja Marković, Xuesen Du, Dusan Stosic, Sanja Bosnar, Aline Auroux, Josip Bronić, Srečo D. Škapin, Arnaud Travert, Georgeta Postole, Vladimir B. Pavlović, Ljiljana Damjanović-Vasilić, Vladislav Rac, Vesna Rakić, IRCELYON-Approches thermodynamiques, analytiques et réactionnelles intégrées (ATARI), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)
- Subjects
Materials science ,Morphology (linguistics) ,Hierarchical ZSM-5 ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,General Materials Science ,Zeolite ,ZSM-5 zeolite ,Acidity ,Flower like ,Flower-like morphology ,General Chemistry ,Microporous material ,[CHIM.CATA]Chemical Sciences/Catalysis ,In situ FTIR ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,[SDE.ES]Environmental Sciences/Environmental and Society ,0104 chemical sciences ,Amorphous solid ,Microcalorimetry ,FTIR ,Chemical engineering ,Mechanics of Materials ,Homogeneous ,0210 nano-technology ,Mesoporous material ,Dual template - Abstract
Dual templating approach, using hexadecyltrimethylammonium bromide (CTAB), was employed in an attempt to synthesize hierarchical ZSM-5 zeolite. Amount of mesoporogen and the duration of aging of the precursor were varied. Majority of the synthesis routes resulted in phase separation, yielding separate ZSM-5 and amorphous mesoporous material. The relative amounts of the two phases were dependent on the CTAB amount ratio and also significantly on the duration of precursor aging before CTAB addition. One particular combination of the two factors led to the formation of a homogeneous hierarchical form of ZSM-5 with leafy morphology, consisting of intergrown thin crystalline sheets which formed flower-like structures. The hierarchical ZSM-5 possessed significant microporous (≈95 m2/g) and highly developed mesoporous surface (≈470 m2/g), with a relatively broad distribution of mesopore sizes (
- Published
- 2021
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