Resolving intermediate solution structures during the formation of mesoporous SBA-15

Journal of the American Chemical Society
Sharon RuthsteinDaniella Goldfarb

Abstract

The evolution of the solution microstructures during the formation of the hexagonal mesoporous material SBA-15 was studied by direct imaging and freeze-fracture replication cryo-TEM. A reaction mixture was sampled at different times after the addition of tetramethoxyorthosilane (TMOS) to an acidic solution of Pluronic P123 held at 50 degrees C. Solution microstructures were detected by direct imaging cryo-TEM in the time window of 6.5-40 min after the addition of the TMOS (t = 0). The micrographs revealed that the initial spheroidal micelles evolve into threadlike micelles, which become longer and straighter with time. Then bundles with the dimensions similar to those found in the final material appeared, although there was no sign of a hexagonal arrangement up to 40 min. Due to the appearance of a precipitate at 40 min the sample became too viscous, preventing clear observation of its content. To observe the structures present after 40 min, freeze-fracture replication was carried out as well. Such samples were collected also at 22 min and showed the presence of threadlike micelles in agreement with the direct imaging cryo-TEM micrographs. The 2 h samples showed some areas of hexagonal ordered structures, which become very clea...Continue Reading

References

Jul 15, 1997·Journal of Colloid and Interface Science·S L NolanS R Dungan
Oct 23, 2001·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·G WirnsbergerG D Stucky
Mar 19, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Katarina FlodströmViveka Alfredsson
Jun 30, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Katarina FlodströmMika Lindén
Jan 13, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·N GovD Goldfarb
Jul 21, 2006·The Journal of Physical Chemistry. B·Andrei Y KhodakovDominique Durand

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Nov 5, 2013·Journal of Colloid and Interface Science·Emma M BjörkMagnus Odén
Mar 19, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Emma M JohanssonMagnus Odén
Sep 20, 2008·Chemical Communications : Chem Comm·Xiulei JiLinda F Nazar
Jul 16, 2014·Expert Opinion on Drug Delivery·Justin SiefkerMarc-Olivier Coppens
Feb 22, 2007·Chemical Communications : Chem Comm·Ying WanDongyuan Zhao
Sep 6, 2014·Journal of the American Chemical Society·Yao Zhou, Hua Chun Zeng
Jun 25, 2015·Accounts of Chemical Research·Viveka Alfredsson, Håkan Wennerström
Nov 20, 2009·Physical Chemistry Chemical Physics : PCCP·Peter LintonViveka Alfredsson
Apr 2, 2010·Physical Chemistry Chemical Physics : PCCP·Peter LintonViveka Alfredsson
Jul 23, 2013·Advanced Materials·Wei LiDongyuan Zhao
Feb 15, 2013·Chemical Society Reviews·Corine GérardinBénédicte Lebeau
May 30, 2009·Chemistry : a European Journal·Yu ZhouJian Hua Zhu
Mar 10, 2017·Journal of Toxicology and Environmental Health. Part a·Michela CangiottiMaria Francesca Ottaviani
Feb 20, 2007·Chemical Communications : Chem Comm·Marianne Impéror-ClercVladimir L Zholobenko
Nov 8, 2012·Chemical Society Reviews·Tian-Yi MaZhong-Yong Yuan
Jan 29, 2010·The Journal of Physical Chemistry. B·Anne GalarneauM Francesca Ottaviani
Mar 12, 2010·The Journal of Physical Chemistry. B·Konstantin UlrichPegie Cool
Mar 5, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Shilei DingWeiping Ding
Jun 22, 2007·Chemical Reviews·Ying Wan, Dongyuan Zhao
Jan 2, 2009·The Journal of Physical Chemistry. B·Miguel JorgeNigel A Seaton
Jan 1, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Andreas SundblomKrister Holmberg
Mar 6, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Peter LintonViveka Alfredsson
Oct 16, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Shiori Kubo, Katsunori Kosuge
Jul 31, 2021·Chemical Reviews·Aoon RizviJoseph P Patterson
Oct 10, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Emma M BjörkMagnus Odén
Dec 8, 2011·The Journal of Physical Chemistry. B·Florentin MichauxMarie José Stébé
May 10, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·C V TeixeiraV Alfredsson
Jul 5, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Juanfang RuanViveka Alfredsson
Jul 28, 2011·Journal of the American Chemical Society·Jasper JammaerJohan A Martens
Jan 12, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Julien SchmittFlorian Meneau
Apr 16, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Aoli WuLiqiang Zheng
Aug 26, 2011·The Journal of Physical Chemistry. B·Sabine ManetCyrille Rochas
Jan 2, 2008·The Journal of Physical Chemistry. B·A G DenkovaM-O Coppens
Oct 6, 2021·Chemical Reviews·Linlin DuanDongyuan Zhao

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