Abstract:
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[EN] Stacking faults are two-dimensional planar defects frequently arising in zeolites, modifying their properties and potentially affecting their performance in catalysis and separation applications. In classical zeolite ...[+]
[EN] Stacking faults are two-dimensional planar defects frequently arising in zeolites, modifying their properties and potentially affecting their performance in catalysis and separation applications. In classical zeolite intergrowths, a topologically unique zeolite layer may often pile up after some spatial transformation (lateral translation, rotation, and/or reflection) that may occur in different amounts or directions with about similar probabilities, leading to a difficult to control disorder. Here, we present a new kind of zeolite intergrowth that requires an additional topologically distinct layer rather than a spatial transformation of a unique one. Stacking of the so-called pentasil layers produces the well-known medium pore zeolite MFI. Intercalation in strict alternation of a topologically distinct second layer sandwiched between pentasil layers expands the structure to produce the new extra-large pore IDM-1. Stacking disorder modulates the structural expansion along the stacking direction. The disordered materials have been studied by simulation of the X-ray diffraction patterns using the program DIFFaX and by Cs-corrected high-resolution electron microscopy. We show that disorder does not occur at random but in extended domains and can be controlled all the way from MFI to IDM-1 by just varying the concentration of the synthesis mixture.
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Project ID:
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105479RB-I00/ES/MATERIALES FUNCIONALES A PARTIR DE RECURSOS NATURALES PARA SOLUCIONES SOSTENIBLES EN ENERGIA, MEDIOAMBIENTE Y SALUD/
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105479RB-I00/ES/MATERIALES FUNCIONALES A PARTIR DE RECURSOS NATURALES PARA SOLUCIONES SOSTENIBLES EN ENERGIA, MEDIOAMBIENTE Y SALUD/
info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//PROMETEO%2F2018%2F024//SISTEMAS AVANZADOS DE LIBERACION CONTROLADA/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-101599-B-C22/ES/DESARROLLO Y APLICACION DE SISTEMAS ANTIMICROBIANOS PARA LA INDUSTRIA ALIMENTARIA BASADOS EN SUPERFICIES FUNCIONALIZADAS Y SISTEMAS DE LIBERACION CONTROLADA/
info:eu-repo/grantAgreement/NSFC//21835002/
info:eu-repo/grantAgreement/MINECO//MAT2015-71117-R/ES/NUEVAS ARQUITECTURAS HIBRIDAS MEDIANTE ENSAMBLADO CONTROLADO DE NANOMATERIALES/
info:eu-repo/grantAgreement/NSFC//21850410448/
info:eu-repo/grantAgreement/Gobierno de Aragón//DGA E13-20R/
info:eu-repo/grantAgreement/MICINN//RYC2018-024561-I/
info:eu-repo/grantAgreement/ShanghaiTech University//EM02161943/
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Thanks:
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The authors thank funding from the Spanish Ministry of Science, Innovation and Universities, under Projects MAT2015-71117-R (MINECO/FEDER, UE), PID2019105479RB-I00 and RTI2018-101599-B-C22 (MCUI/AEI/ FEDER, UE), the Swedish ...[+]
The authors thank funding from the Spanish Ministry of Science, Innovation and Universities, under Projects MAT2015-71117-R (MINECO/FEDER, UE), PID2019105479RB-I00 and RTI2018-101599-B-C22 (MCUI/AEI/ FEDER, UE), the Swedish Research Council (VR), and the Knut and Alice Wallenberg Foundation (KAW). L.A.V. also thanks the Generalitat Valenciana (project PROMETEO/ 2018/024). A.M. acknowledges the Spanish Ministry of Science (RYC2018-024561-I) and the Regional government of Aragon (DGA E13_20R), the National Natural Science Foundation of China (NFSC-21850410448 and NSFC21835002), and the Centre for High-resolution Electron Microscopy (C.EM), supported by SPST of ShanghaiTech University under contract No. EM02161943.
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