TY  - JOUR
AU  - Bosnar, Sanja
AU  - Rac, Vladislav
AU  - Stošić, Dušan
AU  - Travert, Arnaud
AU  - Postole, Georgeta
AU  - Auroux, Aline
AU  - Škapin, Srečo Davor
AU  - Damjanović-Vasilić, Ljiljana S.
AU  - Bronić, Josip
AU  - Du, Xuesen
AU  - Marković, Smilja
AU  - Pavlović, Vladimir B.
AU  - Rakić, Vesna M.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13631
AB  - 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 (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.
T2  - Microporous and Mesoporous Materials
T1  - Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study
SP  - 111534
VL  - 329
DO  - 10.1016/j.micromeso.2021.111534
UR  - https://hdl.handle.net/21.15107/rcub_dais_13631
ER  - 

@article{
author = "Bosnar, Sanja and Rac, Vladislav and Stošić, Dušan and Travert, Arnaud and Postole, Georgeta and Auroux, Aline and Škapin, Srečo Davor and Damjanović-Vasilić, Ljiljana S. and Bronić, Josip and Du, Xuesen and Marković, Smilja and Pavlović, Vladimir B. and Rakić, Vesna M.",
year = "2022",
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 (<20 nm). The acidity of all samples was studied in detail. Isothermal microcalorimetry/volumetry of ammonia adsorption provided quantitative data on the number and distribution of strength of acidic sites. In situ FTIR of pyridine and collidine adsorption was used to quantify Brønsted and Lewis acid sites, and to provide information on their location - in the micropores or mesopores/external surface. The hierarchical ZSM-5 possessed both Lewis and Brønsted acidity, with Brønsted sites located mainly in the micropores. All samples were fully characterized using XRD, low temperature nitrogen adsorption, FESEM and EDS. The synthetic route used for obtaining the ZSM-5 zeolite with flower-like morphology is a simple strategy for preparing hierarchical ZSM-5 forms targeting enhanced diffusivity and accessibility of catalytically active sites.",
journal = "Microporous and Mesoporous Materials",
title = "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study",
pages = "111534",
volume = "329",
doi = "10.1016/j.micromeso.2021.111534",
url = "https://hdl.handle.net/21.15107/rcub_dais_13631"
}

Bosnar, S., Rac, V., Stošić, D., Travert, A., Postole, G., Auroux, A., Škapin, S. D., Damjanović-Vasilić, L. S., Bronić, J., Du, X., Marković, S., Pavlović, V. B.,& Rakić, V. M.. (2022). Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials, 329, 111534.
https://doi.org/10.1016/j.micromeso.2021.111534
https://hdl.handle.net/21.15107/rcub_dais_13631

Bosnar S, Rac V, Stošić D, Travert A, Postole G, Auroux A, Škapin SD, Damjanović-Vasilić LS, Bronić J, Du X, Marković S, Pavlović VB, Rakić VM. Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study. in Microporous and Mesoporous Materials. 2022;329:111534.
doi:10.1016/j.micromeso.2021.111534
https://hdl.handle.net/21.15107/rcub_dais_13631 .

Bosnar, Sanja, Rac, Vladislav, Stošić, Dušan, Travert, Arnaud, Postole, Georgeta, Auroux, Aline, Škapin, Srečo Davor, Damjanović-Vasilić, Ljiljana S., Bronić, Josip, Du, Xuesen, Marković, Smilja, Pavlović, Vladimir B., Rakić, Vesna M., "Overcoming phase separation in dual templating: A homogeneous hierarchical ZSM-5 zeolite with flower-like morphology, synthesis and in-depth acidity study" in Microporous and Mesoporous Materials, 329 (2022):111534,
https://doi.org/10.1016/j.micromeso.2021.111534 .,
https://hdl.handle.net/21.15107/rcub_dais_13631 .

TY  - CONF
AU  - Bosnar, Sanja
AU  - Rac, Vladislav
AU  - Škapin, Srečo Davor
AU  - Damjanović Vasilić, Ljiljana
AU  - Marković, Smilja
AU  - Bronić, Josip
AU  - Rakić, Vesna
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6989
AB  - In a quest for optimal synthesis procedure of hierarchically porous zeolite by dual template method, a series of materials was prepared starting from zeolite yielding precursor with an addition of surfactant as a mesoporogen. Characterization of the obtained materials showed that all samples possess micro and mesoporous structures, which ratio depends on the amount of surfactant present in the reaction mixture. However, in the most of the samples separation of phases occurred, and crystalline zeolite phase along amorphous MCM-41 like phase were detected, except for the sample obtained from the modified precursor, where only crystalline zeolite phase was obtained, with a specific and unusual morphology. Adsorption isotherm of that sample resembles the isotherms obtained for post synthesis modified samples.
PB  - Belgrade : Serbian Zeolite Association
C3  - Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites, 3 - 5 October 2019, Belgrade, Serbia
T1  - Micro/mesoporous aluminosilicate materials via dual templating, Part 1: synthesis and characterization
SP  - 134
EP  - 137
UR  - https://hdl.handle.net/21.15107/rcub_dais_6989
ER  - 

@conference{
author = "Bosnar, Sanja and Rac, Vladislav and Škapin, Srečo Davor and Damjanović Vasilić, Ljiljana and Marković, Smilja and Bronić, Josip and Rakić, Vesna",
year = "2019",
abstract = "In a quest for optimal synthesis procedure of hierarchically porous zeolite by dual template method, a series of materials was prepared starting from zeolite yielding precursor with an addition of surfactant as a mesoporogen. Characterization of the obtained materials showed that all samples possess micro and mesoporous structures, which ratio depends on the amount of surfactant present in the reaction mixture. However, in the most of the samples separation of phases occurred, and crystalline zeolite phase along amorphous MCM-41 like phase were detected, except for the sample obtained from the modified precursor, where only crystalline zeolite phase was obtained, with a specific and unusual morphology. Adsorption isotherm of that sample resembles the isotherms obtained for post synthesis modified samples.",
publisher = "Belgrade : Serbian Zeolite Association",
journal = "Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites, 3 - 5 October 2019, Belgrade, Serbia",
title = "Micro/mesoporous aluminosilicate materials via dual templating, Part 1: synthesis and characterization",
pages = "134-137",
url = "https://hdl.handle.net/21.15107/rcub_dais_6989"
}

Bosnar, S., Rac, V., Škapin, S. D., Damjanović Vasilić, L., Marković, S., Bronić, J.,& Rakić, V.. (2019). Micro/mesoporous aluminosilicate materials via dual templating, Part 1: synthesis and characterization. in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites, 3 - 5 October 2019, Belgrade, Serbia
Belgrade : Serbian Zeolite Association., 134-137.
https://hdl.handle.net/21.15107/rcub_dais_6989

Bosnar S, Rac V, Škapin SD, Damjanović Vasilić L, Marković S, Bronić J, Rakić V. Micro/mesoporous aluminosilicate materials via dual templating, Part 1: synthesis and characterization. in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites, 3 - 5 October 2019, Belgrade, Serbia. 2019;:134-137.
https://hdl.handle.net/21.15107/rcub_dais_6989 .

Bosnar, Sanja, Rac, Vladislav, Škapin, Srečo Davor, Damjanović Vasilić, Ljiljana, Marković, Smilja, Bronić, Josip, Rakić, Vesna, "Micro/mesoporous aluminosilicate materials via dual templating, Part 1: synthesis and characterization" in Proceedings of the 8th Serbian-Croatian-Slovenian Symposium on Zeolites, 3 - 5 October 2019, Belgrade, Serbia (2019):134-137,
https://hdl.handle.net/21.15107/rcub_dais_6989 .