Results 231 to 240 of about 24,536 (272)
In vitro profiling and molecular dynamics simulation studies of berberine loaded MCM-41 mesoporous silica nanoparticles to prevent neuronal apoptosis. [PDF]
Nanoscale AdvSingh AK +7 more
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Preparation of Activated Carbon-Reinforced Composite Beads Based on MnO2/MCM-41@Fe3O4 and Calcium Alginate for Efficient Removal of Tetracycline in Aqueous Solutions. [PDF]
Polymers (Basel)Zheng Z, Shi R, Zhang X, Ni Y, Zhang H.
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Metastability of MCM-41 and Al-MCM-41
The Journal of Physical Chemistry A, 2008The apparent stability of MCM-41 and Al-MCM-41 in water was appraised in a series of solubility experiments. MCM-41 is a siliceous, mesoporous material of hexagonal symmetry and exceptionally high surface area first synthesized in 1992. The dissolution experiments were carried out at several solid/water ratios: 1/200, 1/100, and 1/75. Results indicated
Colin P, Guthrie, Eric J, Reardon
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Vapor-phase silylation of MCM-41 and Ti-MCM-41
Microporous and Mesoporous Materials, 2003Abstract MCM-41 mesoporous molecular sieves have been silylated with trimethylchlorosilane (TMCS) and trimethylethoxysilane (TMES) under anhydrous, vapor-phase reaction conditions. The silylation reactions were performed at 473 and 623 K following pre-treatment at either 523 or 973 K.
Robert R Sever +3 more
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Formation Process of MCM-41 Precursor and Porous Texture of MCM-41
Journal of Colloid and Interface Science, 2000The formation process of the MCM-41 precursors (silicate/surfactant complex) was investigated on the basis of the pH titration curves of Na(4)SiO(4) in the presence of [C(16)H(33)N(CH(3))(3)]Cl. Measurements of the pH titration curves were carried out using the computer-controlled gravimetric titrator constructed in our laboratory.
, Naono +4 more
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Dyes and Pigments, 2009
Abstract 4-Piperazinyl- N -methyl-1,8-naphthalimide (PMN) was synthesized and encapsulated into mesoporous molecular sieves. The fluorescent emission spectra and fluorescence decay of PMN/M-MCM-41 (where M = Si, Ce, Al) were used to investigate the photophysical properties of the hybrid composites. The emission intensity of 4-piperazinyl- N -methyl-1,
G CHEN, L WANG, J ZHANG, F CHEN, M ANPO
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Abstract 4-Piperazinyl- N -methyl-1,8-naphthalimide (PMN) was synthesized and encapsulated into mesoporous molecular sieves. The fluorescent emission spectra and fluorescence decay of PMN/M-MCM-41 (where M = Si, Ce, Al) were used to investigate the photophysical properties of the hybrid composites. The emission intensity of 4-piperazinyl- N -methyl-1,
G CHEN, L WANG, J ZHANG, F CHEN, M ANPO
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Photoluminescence study of mesoporous MCM-41 and Ti-grafted MCM-41
Research on Chemical Intermediates, 2003Photoluminescence combined with diffuse reflectance UV—Vis spectroscopy was used to characterise both the pure siliceous MCM-41 and Ti-MCM-41 containing tetrahedral Ti(IV) species anchored onto the inner walls of the siliceous MCM-41. Both Ti-MCM-41 and MCM-41 showed complex photoemission signals and this study allows, for the first time, the ...
GIANOTTI, Enrica +5 more
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Langmuir, 2000
Temperature-programmed desorption (TPD) of benzene on Si−MCM-41, Na−AlSi−MCM-41, and H−AlSi−MCM-41 mesoporous materials from 323 to 673 K at different linear heating rates (5, 10, 20, and 25 K min-1) and that on Si−MCM-41 at different adsorbate loadings (0.45−10.7 μmol g-1) has been investigated.
Vasant R. Choudhary, Kshudiram Mantri
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Temperature-programmed desorption (TPD) of benzene on Si−MCM-41, Na−AlSi−MCM-41, and H−AlSi−MCM-41 mesoporous materials from 323 to 673 K at different linear heating rates (5, 10, 20, and 25 K min-1) and that on Si−MCM-41 at different adsorbate loadings (0.45−10.7 μmol g-1) has been investigated.
Vasant R. Choudhary, Kshudiram Mantri
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Molecular Sieves (MCM-41, Al-MCM-41) Characterization Using Different Silica Sources
Materials Science Forum, 2012Research, synthesis and catalytic application of molecular sieves areas has been constituting a large field of development and prominence in recent decades, due to the large potential of these materials in respect of theirs catalytic properties. The need for costs reduction in the production of these structures, has encouraged the search for new ...
José Otávio Peroba Nascimento Santos +4 more
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Toluene hydrogenation over nickel-containing MCM-41 and Ti-MCM-41 materials
Journal of Porous Materials, 2009Nickel-containing MCM-41 and Ti-MCM-41 mesoporous materials with different amounts of nickel were prepared by one-pot, sol–gel synthesis. The properties of the nickel catalysts were studied by means of X-ray diffraction (XRD), N2 physisorption, UV-Vis spectroscopy and temperature programmed reduction (TPR) methods. The catalysts have been tested in the
Ágnes Szegedi, Margarita Popova
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