Tuning the separation properties of zeolitic imidazolate framework core-shell structures: Via post-synthetic modification

Javier Sánchez-Laínez; Adrián Veiga; Beatriz Zornoza; Salvador R.G. Balestra; Said Hamad; A. Rabdel Ruiz-Salvador; Sofia Calero; Carlos Téllez; Joaquín Coronas

doi:10.1039/c7ta08778k

Tuning the separation properties of zeolitic imidazolate framework core-shell structures: Via post-synthetic modification

Javier Sánchez-Laínez, Adrián Veiga, Beatriz Zornoza, Salvador R.G. Balestra, Said Hamad, A. Rabdel Ruiz-Salvador, Sofia Calero, Carlos Téllez, Joaquín Coronas

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

64 Citaten (Scopus)

Samenvatting

The conversion of ZIF-8 into ZIF-7 via post-synthetic modification with benzimidazole has been monitored by quantifying the liberated 2-methylimidazole by chromatography. The reaction kinetics have been adjusted to the shrinking core model, providing the diffusion coefficient of bIm inside the pores and the reaction kinetic constant (2.86 × 10^-7 cm² s^-1 and 1.36 × 10^-4 cm s^-1, respectively). A wide variety of ZIF-7/8 hybrid core-shell frameworks have been obtained during this reaction. The most promising have been characterized by SEM/TEM, TGA, N₂ and CO₂ adsorption, FTIR and ¹³C NMR, showing features of the coexistence of both phases inside the frameworks. Their structures have also been simulated, providing comparable XRD and adsorption results. The hybrid material has been used as a filler for PBI mixed matrix membranes (MMMs) applied to H₂/CO₂ separation, enhancing the performances of the bare PBI polymer and MMMs containing ZIF-8 or ZIF-7 as a filler, with a maximum H₂ permeability value of 1921 Barrer and a H₂/CO₂ selectivity of 11.8.

Originele taal-2	Engels
Pagina's (van-tot)	25601-25608
Aantal pagina's	8
Tijdschrift	Journal of Materials Chemistry A
Volume	5
Nummer van het tijdschrift	48
DOI's	https://doi.org/10.1039/c7ta08778k
Status	Gepubliceerd - 2017
Extern gepubliceerd	Ja

Financiering

The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/ 2007–2013) under grant agreement no 608490, project M4CO2. In addition, nancial support from the Spanish MINECO and FEDER (MAT2016-77290-R and CTP2016-80206-P), the Aragón Government (T05) and the ESF is gratefully acknowledged. J. S.-L. thanks the Spanish Education Ministry Program FPU2014 for his PhD grant. S. R. G. Balestra also thanks the Spanish MINECO for his predoctoral fellowship (BES-2014-067825 from CTQ2013-48396-P). All the microscopy work was done at the Laboratorio de Microscopías Avanzadas at the Instituto de Nanociencia de Aragón (LMA-INA). Finally, the authors would like to acknowledge the use of the Servicio General de Apoyo a la Investigación-SAI, Universidad de Zaragoza.

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title = "Tuning the separation properties of zeolitic imidazolate framework core-shell structures: Via post-synthetic modification",

abstract = "The conversion of ZIF-8 into ZIF-7 via post-synthetic modification with benzimidazole has been monitored by quantifying the liberated 2-methylimidazole by chromatography. The reaction kinetics have been adjusted to the shrinking core model, providing the diffusion coefficient of bIm inside the pores and the reaction kinetic constant (2.86 × 10-7 cm2 s-1 and 1.36 × 10-4 cm s-1, respectively). A wide variety of ZIF-7/8 hybrid core-shell frameworks have been obtained during this reaction. The most promising have been characterized by SEM/TEM, TGA, N2 and CO2 adsorption, FTIR and 13C NMR, showing features of the coexistence of both phases inside the frameworks. Their structures have also been simulated, providing comparable XRD and adsorption results. The hybrid material has been used as a filler for PBI mixed matrix membranes (MMMs) applied to H2/CO2 separation, enhancing the performances of the bare PBI polymer and MMMs containing ZIF-8 or ZIF-7 as a filler, with a maximum H2 permeability value of 1921 Barrer and a H2/CO2 selectivity of 11.8.",

author = "Javier S{\'a}nchez-La{\'i}nez and Adri{\'a}n Veiga and Beatriz Zornoza and Balestra, {Salvador R.G.} and Said Hamad and Ruiz-Salvador, {A. Rabdel} and Sofia Calero and Carlos T{\'e}llez and Joaqu{\'i}n Coronas",

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doi = "10.1039/c7ta08778k",

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AU - Sánchez-Laínez, Javier

AU - Veiga, Adrián

AU - Zornoza, Beatriz

AU - Balestra, Salvador R.G.

AU - Hamad, Said

AU - Ruiz-Salvador, A. Rabdel

AU - Calero, Sofia

AU - Téllez, Carlos

AU - Coronas, Joaquín

PY - 2017

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N2 - The conversion of ZIF-8 into ZIF-7 via post-synthetic modification with benzimidazole has been monitored by quantifying the liberated 2-methylimidazole by chromatography. The reaction kinetics have been adjusted to the shrinking core model, providing the diffusion coefficient of bIm inside the pores and the reaction kinetic constant (2.86 × 10-7 cm2 s-1 and 1.36 × 10-4 cm s-1, respectively). A wide variety of ZIF-7/8 hybrid core-shell frameworks have been obtained during this reaction. The most promising have been characterized by SEM/TEM, TGA, N2 and CO2 adsorption, FTIR and 13C NMR, showing features of the coexistence of both phases inside the frameworks. Their structures have also been simulated, providing comparable XRD and adsorption results. The hybrid material has been used as a filler for PBI mixed matrix membranes (MMMs) applied to H2/CO2 separation, enhancing the performances of the bare PBI polymer and MMMs containing ZIF-8 or ZIF-7 as a filler, with a maximum H2 permeability value of 1921 Barrer and a H2/CO2 selectivity of 11.8.

AB - The conversion of ZIF-8 into ZIF-7 via post-synthetic modification with benzimidazole has been monitored by quantifying the liberated 2-methylimidazole by chromatography. The reaction kinetics have been adjusted to the shrinking core model, providing the diffusion coefficient of bIm inside the pores and the reaction kinetic constant (2.86 × 10-7 cm2 s-1 and 1.36 × 10-4 cm s-1, respectively). A wide variety of ZIF-7/8 hybrid core-shell frameworks have been obtained during this reaction. The most promising have been characterized by SEM/TEM, TGA, N2 and CO2 adsorption, FTIR and 13C NMR, showing features of the coexistence of both phases inside the frameworks. Their structures have also been simulated, providing comparable XRD and adsorption results. The hybrid material has been used as a filler for PBI mixed matrix membranes (MMMs) applied to H2/CO2 separation, enhancing the performances of the bare PBI polymer and MMMs containing ZIF-8 or ZIF-7 as a filler, with a maximum H2 permeability value of 1921 Barrer and a H2/CO2 selectivity of 11.8.

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Tuning the separation properties of zeolitic imidazolate framework core-shell structures: Via post-synthetic modification

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