Characterization and investigation mechanism of hydrothermal stability for micropore-free ordered mesoporous molecular sieves

2012 ◽  
Vol 258 (22) ◽  
pp. 8895-8901 ◽  
Author(s):  
Hongping Pu ◽  
Caiyun Han ◽  
Hua Wang ◽  
Siwei Xu ◽  
Liuyi Zhang ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Hydrothermal Stability ◽  
Mesoporous Molecular Sieves ◽  
Ordered Mesoporous

Adsorption of Carbon Dioxide into Amine Functionalized Ordered Mesoporous Materials

2018 ◽  
Author(s):  
Marcela N. Barbosa ◽  
Maria J. F. Costa ◽  
Maricele N. Barbosa ◽  
Valter J. Fernandes Jr. ◽  
Giancarlo R. Salazar-Banda ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Photoelectron Spectroscopy ◽  
Molecular Sieves ◽  
Synthesis Method ◽  
Mesoporous Molecular Sieves ◽  
Carbon Dioxide Adsorption ◽  
X Ray ◽  
Ordered Mesoporous ◽  
Mcm 41

The adsorption of carbon dioxide on amino silanes-functionalized MCM-41 and SBA-15 materials is reported. The functionalization of mesoporous silicas was made by post-synthesis method, by impregnation of 3-aminopropyltriethoxysilane. The obtained materials were characterized by X-ray diffraction, scanning and transmission electron microscopies, nitrogen adsorption-desorption and X-ray photoelectron spectroscopy measurements. The carbon dioxide adsorption capacities for the samples were carried out under ambient pressures. The obtained results evidenced that amino-silanes with a terminal amine (–NH2) were functionalized through covalent coupling of this group on the surface of the channels in the ordered mesoporous silica, meaning that the amine is anchored on the surface of the bigger pores of the MCM-41 and SBA-15 support. For functionalized materials, the CO2 adsorption capacity of the AMCM-41 increased from 0.18 to 1.1 mmol·g−1, whereas for ASBA-15, it was from 0.6 to 1.8 mmol·g−1. The Lagergren kinetic algorithms were applied in order to validate the obtained results, evidencing the enhanced carbon dioxide adsorption capacity and stability of the functionalized ordered mesoporous molecular sieves.

scholarly journals Dynamics of pH-sensitive nitroxide radicals in water adsorbed in ordered mesoporous molecular sieves by EPR Spectroscopy

2013 ◽  
Vol 179 ◽  
pp. 258-264 ◽  
Author(s):  
Elena G. Kovaleva ◽  
Leonid S. Molochnikov ◽  
Elena L. Golovkina ◽  
Martin Hartmann ◽  
Igor. A. Kirilyuk ◽  
...  
Keyword(s):  
Epr Spectroscopy ◽  
Molecular Sieves ◽  
Ph Sensitive ◽  
Mesoporous Molecular Sieves ◽  
Nitroxide Radicals ◽  
Ordered Mesoporous

scholarly journals MCM-41 ordered mesoporous molecular sieves synthesis and characterization

1999 ◽  
Vol 2 (3) ◽  
pp. 173-179 ◽  
Author(s):  
Rogério A.A. Melo ◽  
Marcus V. Giotto ◽  
João Rocha ◽  
Ernesto A. Urquieta-González
Keyword(s):  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Synthesis And Characterization ◽  
Ordered Mesoporous ◽  
Mcm 41

Improvement of hydrothermal stability of an ordered mesoporous molecular sieve via multistage recrystallization

2007 ◽  
Vol 85 (5) ◽  
pp. 379-382 ◽  
Author(s):  
Yong M Luo ◽  
Zhao Y Hou ◽  
Rong T Li ◽  
Xiao M Zheng
Keyword(s):  
Mesoporous Materials ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Mesoporous Molecular Sieve ◽  
Hydrothermal Stability ◽  
Hexagonal Symmetry ◽  
Stability Tests ◽  
Ordered Mesoporous ◽  
Mesoporous Aluminosilicate

A highly ordered mesoporous aluminosilicate molecular sieve, designated as MSAMS-4, has been synthesized via multistage recrystallization. Hydrothermal-stability tests revealed that MSAMS-4 has retained a well-ordered hexagonal-symmetry mesostructure both after treatment with 100 °C water for 120 h and after steaming at 800 °C for 6 h.Key words: aluminosilicates molecular sieves, mesoporous materials, multistage recrystallization, hydrothermal stability.

Improvement of the hydrothermal stability of MCM-48 mesoporous molecular sieves

2008 ◽  
Vol 34 (2-3) ◽  
pp. 267-286 ◽  
Author(s):  
Lingzhi Wang ◽  
Yaofeng Shao ◽  
Jinlong Zhang ◽  
Masakazu Anpo
Keyword(s):  
Molecular Sieves ◽  
Hydrothermal Stability ◽  
Mesoporous Molecular Sieves

Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism

Nature ◽  
1992 ◽  
Vol 359 (6397) ◽  
pp. 710-712 ◽  
Author(s):  
C. T. Kresge ◽  
M. E. Leonowicz ◽  
W. J. Roth ◽  
J. C. Vartuli ◽  
J. S. Beck
Keyword(s):  
Liquid Crystal ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Ordered Mesoporous
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