Synthesis and characterization of mesoporous molecular sieves
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Michal Horňáček
,
Pavol Hudec
Abstract
In the synthesis of mesoporous molecular sieves of the type MCM-41, different cationactive surfactants and sources of silicon were used. Moreover, Al-MCM-41 samples with different content of aluminium were synthesized. MCM-41 and Al-MCM-41 were synthesized at elevated temperature in stainless-steel autoclaves. Prepared mesoporous molecular sieves were characterized by powder X-ray diffraction (XRD), physical adsorption of nitrogen at the temperature of −197°C, sorption capacity of benzene, and by infrared spectroscopy (FTIR). Acidity was measured for Al-MCM-41 by temperature programmed desorption of ammonia (TPDA) and by FTIR of adsorbed pyridine. Acid catalytic activity of Al-MCM-41 was tested by isomerization of o-xylene. Influence of the synthesis reproducibility, surfactant used, source of silicon, synthesis time, source of aluminium, and Si to Al mole ratio on the properties of mesoporous molecular sieves were evaluated.
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© 2009 Institute of Chemistry, Slovak Academy of Sciences
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- Analysis of spectinomycin in fermentation broth by reversed-phase chromatography
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- Effect of anthraquinone on brightness value and crystalline structure of pulp during soda processes
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- Study on polymeric micelles of poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) copolymer and its mixtures with poly(γ-benzyl l-glutamate) homopolymer in ethanol
- Synthesis and characterization of mesoporous molecular sieves
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- Novel use of silicon nanocrystals and nanodiamonds in biology
- Fluoride anion sensing using colorimetric reagents containing binaphthyl moiety and urea binding site
- Spectrophotometric methods for sertraline hydrochloride and/or clidinium bromide determination in bulk and pharmaceutical preparations
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