Investigation the effects of Al-grafting and calcination temperature on the acidity and physicochemical properties of silica SBA-15
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Abstract
In this study, the effect of calcination temperature and Si/Al mole ratio on acidity and physicochemical properties of silica SBA-15 were investigated. Silica SBA-15 samples were calcined at 350, 450 and 550 °C, and then post-synthesis, the Al-grafting method was applied to incorporate aluminum species into their framework with Si/Al mole ratio of 10 and 30. Characterizations using small angle XRD and N2 adsorption–desorption techniques indicated that the hexagonal mesoporous structure was retained after performing Al-grafting even at the high aluminum loading. Moreover, FTIR results implied that the aluminum species were incorporated into the SBA-15 framework. NH3-TPD results showed that by decreasing Si/Al mole ratio at all calcination temperatures, the number of weak acid sites increased in comparison to those of the pure SBA-15 samples. Additionally, the maximum total acidity of synthesized samples was observed at the calcination temperature of 450 °C with Si/Al mole ratio of 30.
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References
J. C. Morales-Ortuno, R. A. Ortega-Domínguez, P. Hernández-Hipólito, X. Bokhimi, T. E. Klimova, Catal. Today 271 (2016) 127 (https://doi.org/10.1016/j.cattod.2015.07.028)
K. Jaroszewska, A. Masalska, D. Czycz, J. Grzechowiak, Fuel Process. Technol. 167 (2017) 1 (https://doi.org/10.1016/j.fuproc.2017.06.012)
T. Klimova, J. Reyes, O. Gutierrez, L. Lizama, Appl. Catal., A 335 (2008) 159 (https://doi.org/10.1016/j.apcata.2007.11.008)
Y. Ganjkhanlou, Z. Tišler, J. M. Hidalgo, K. Frolich, J. Kotera, P. Čičmanec, R. Bulanek, Chem. Pap. 72 (2018) 937 (https://doi.org/10.1007/s11696-017-0336-z)
Gh. Mohammadi Ziarani, M. Rahimifard, F. Nouri, A. Badiei, J. Serb. Chem. Soc. 80 (2015) 1265 (https://doi.org/10.2298/JSC140930045M)
J. M. Rosenholm, T. Czuryszkiewicz, F. Kleitz, J. B. Rosenholm, M. Linde, Langmuir 23 (2007) 4315 (https://doi.org/10.1021/la062450w)
R. Ojeda-López, I. J. Pérez-Hermosillo, J. M. Esparza-Schul, A. Cervantes-Uribe, Adsorption 21 (2015) 659 (https://doi.org/10.1007/s10450-015-9716-2)
H. M. Kao, Ch. Ch. Ting, Sh. W. Chao, J. Mol. Catal., A: Chem. 235 (2005) 200 (https://doi.org/10.1016/j.molcata.2005.03.026)
D. Gao, A. Duan, X. Zhang, Zh. Zhao, E. Hong, J. Li, H. Wang, Appl. Catal., B 165 (2015) 269 (https://doi.org/10.1016/j.apcatb.2014.10.034)
Zh. Luan, M. Hartmann, D. Zhao, W. Zhou, L. Kevan, Chem. Mater. 11 (1999) 1621 (https://doi.org/10.1021/cm9900756)
D. Zhao, J. Feng, Q. Huo, N. Melosh, G. H. Fredrickson, B. F. Chmelka, G. D. Stucky, Science 279 (1998) 548 (https://doi.org/10.1126/science.279.5350.548)
D. Zhao, Q. Huo, J. Feng, B. F. Chmelka, G. D. Stucky, J. Am. Chem. Soc. 120 (1998) 6024 (https://doi.org/10.1021/ja974025i)
S. Brunauer,P. H. Emmett, E. Teller, J. Am. Chem. Soc. 60 (1938) 309
E. P. Barrett, L. G. Joyner, P. P. Halenda, J. Am. Chem. Soc. 73 (1951) 373
W. D. Harkins, G. J. Jura, Chem. Phys. 11 (1943) 430
K. Ch. Mouli, K. Soni, A. Dalai, J. Adjaye, Appl. Catal., A: Gen. 404 (2011) 21 (https://doi.org/10.1016/j.apcata.2011.07.001)
R. Orouj, M. Rashidzadeh, A. Irandokht, S. Sadighi, Energy Sources, A (2019) (https://doi.org/10.1080/15567036.2019.1655116)
A. A. Gurinov, Y. A. Rozhkova, A. Zukal, J. Cejka, I. G. Shenderovich, Langmuir 27 (2011) 12115 (https://doi.org/10.1021/la2017566)
G. Chandrasekar, M. Hartmann, M. Palanichamy, V. Murugesan, Catal. Commun. 8 (2007) 457 (https://doi.org/10.1016/j.catcom.2006.07.021).