Results 181 to 190 of about 6,787 (217)

Chemical modification of high-quality large-pore M41S materials

Journal of Materials Chemistry, 2002
M41S materials with a pore diameter of 80 A and MCM-41 materials with a pore diameter of 30 A were grafted with a variety of trimethoxysilanes and chlorosilanes. The obtained hybrid materials were characterised by thermogravimetric analysis, nitrogen adsorption measurements and multi nuclear MAS NMR.
Benedikt Lindlar, Marco Lüchinger, Adeline Röthlisberger, Mohamed Haouas, Gerhard Pirngruber, Andreas Kogelbauer, Roel Prins   +6 more
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ChemInform Abstract: The Synthesis and Properties of M41S and Related Mesoporous Materials

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. C. VARTULI, W. J. ROTH, J. S. BECK, S. B. MCCULLEN, C. T. KRESGE   +4 more
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Postsynthesis Hydrothermal Restructuring of M41S Mesoporous Molecular Sieves in Water

The Journal of Physical Chemistry B, 1999
A high-quality Si−MCM-41 was prepared with the composition of SiO2, 0.2; TEAOH, 0.25; CTMABr, 35 in H2O using fumed silica as the silica source. The quality of the compounds was assessed using different analytical techniques such as XRD, N2 adsorption−desorption measurement, UV−vis absorption, FTIR, and 29Si MAS NMR.
Laiyuan Chen, Tatsubbro Horiuchi, Toshiaki Mori, Kazuyuki Maeda   +3 more
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Development of a formation mechanism for M41S materials

1994
1. Summary The influence of surfactant/silica molar ratio(Sur/Si) in M41S syntheses was studied in the simple synthesis system consisting of tetraethylorthosilicate(TEOS), water, and the cetyltrimethylammonium(CTMA) cation at 100°C. As the Sur/Si increased from 0.5 to 2, the siliceous products obtained were identified and could be classified into ...
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Adsorption of carbon dioxide and nitrogen on silica lite-1 and M41S type materials

2005
Abstract The ability of silicalite-1 and M41S type materials to adsorb pure CO 2 and N 2 has been experimentally studied by determining the adsorption isotherms at 20°C. The experimental data have been analyzed using the Langmuir and Freundlich adsorption isotherm models.
A. MACARIO, A. KATOVIC, G. GIORDANO, IUCOLANO, FABIO, CAPUTO, DOMENICO   +4 more
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Preparation of M41S family mesoporous silica thin films on porous oxides

Microporous and Mesoporous Materials, 2005
Abstract The preparation of thin films of silicate MCM-41 and silicate MCM-48 on porous oxides have been studied using spin-coating, hydrothermal deposition, X-ray diffraction (XRD), scanning electron microscopy (SEM), N 2 adsorption–desorption and thermogravimetry (TG).
Huang, L., Kawi, S., Hidajat, K., Ng, S.C.   +3 more
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Shawe House, Flixton, M41 5DX: Historic Building Recording

2020
Archaeological Research Services Ltd was commissioned in December 2019 by THT Developments Ltd to undertake a historic building recording of the heritage structure at Shawe House, Pennybridge Lane, Flixton, M41 5DX. The historic building recording was undertaken to discharge condition 3 of the planning permission prior to the demolition of the existing
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Isopropylation of polynuclear aromatic hydrocarbons on Al-containing M41S mesoporous catalysts

Microporous Materials, 1997
Abstract MCM-48 with Al incorporated into the walls constructing its mesopores (Al-MCM-48) was synthesized by a hydrothermal method. Al-MCM-48 possesses almost the same surface area, thermal stability and pore size as MCM-48, and has an acidity equivalent to Al-MCM-41.
S.B. Pu, J.B. Kim, M. Seno, T. Inui
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MPEC 2025-M41 : 2025 MW

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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The discovery of ExxonMobil's M41S family of mesoporous molecular sieves

2004
Publisher Summary This chapter discusses the discovery of ExxonMobil's M41S family of mesoporous molecular sieves. The quest for new molecular sieves in the late 1980's led a team of mobil researchers to the discovery of a family of nanostructured mesoporous materials known as “M41S.” Mobil composition of matter (MCM)-41, the hexagonal phase, is ...
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