A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve
Abstract
Thermal degradation of cetyltrimethylarnmonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with Ea = 116±2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher Ea value (Ea = 153±5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings.
Keywords:
cetyltrimethylammonium bromide (CTMAB) / liquid-crystal templating / non-isothermal kinetics / open-framework / SBA-3 / TG analysisSource:
Studies in Surface Science and Catalysis, 2008, 174, B, 977-980Publisher:
- Elsevier Science Bv, Amsterdam
DOI: 10.1016/S0167-2991(08)80053-5
ISSN: 0167-2991
PubMed:
Scopus: 2-s2.0-55249121413
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Rajić, Nevenka AU - Stojaković, D. AU - Mrak, Maja AU - Kaučič, Venčeslav PY - 2008 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1208 AB - Thermal degradation of cetyltrimethylarnmonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with Ea = 116±2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher Ea value (Ea = 153±5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings. PB - Elsevier Science Bv, Amsterdam T2 - Studies in Surface Science and Catalysis T1 - A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve EP - 980 IS - B SP - 977 VL - 174 DO - 10.1016/S0167-2991(08)80053-5 ER -
@article{ author = "Rajić, Nevenka and Stojaković, D. and Mrak, Maja and Kaučič, Venčeslav", year = "2008", abstract = "Thermal degradation of cetyltrimethylarnmonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with Ea = 116±2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher Ea value (Ea = 153±5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Studies in Surface Science and Catalysis", title = "A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve", pages = "980-977", number = "B", volume = "174", doi = "10.1016/S0167-2991(08)80053-5" }
Rajić, N., Stojaković, D., Mrak, M.,& Kaučič, V.. (2008). A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve. in Studies in Surface Science and Catalysis Elsevier Science Bv, Amsterdam., 174(B), 977-980. https://doi.org/10.1016/S0167-2991(08)80053-5
Rajić N, Stojaković D, Mrak M, Kaučič V. A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve. in Studies in Surface Science and Catalysis. 2008;174(B):977-980. doi:10.1016/S0167-2991(08)80053-5 .
Rajić, Nevenka, Stojaković, D., Mrak, Maja, Kaučič, Venčeslav, "A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve" in Studies in Surface Science and Catalysis, 174, no. B (2008):977-980, https://doi.org/10.1016/S0167-2991(08)80053-5 . .