نتایج جستجو برای: nh2 mcm 48
تعداد نتایج: 153648 فیلتر نتایج به سال:
M41S: A family of mesoporous materials including MCM41, MCM-48, and MCM-50 MSU-1,2,3,4: Michigan State University no. 1, 2, 3, 4, a series of wormhole mesoporous materials prepared in the presence of nonionic surfactants Pluronic: polyethylene oxide–polypropylene oxide triblock surfactant, (EO)m(PO)n(EO)m, for example, P123 = (EO)20 (PO)70(EO)20 SBA-x: Santa Barbara no. x, a series of mesoporou...
IR and NMR spectroscopy were used to determine the silanol content in the most common mesoporous ordered silicas: MCM-41, MCM-48, SBA-15 and SBA-16. In addition, a spray dried MCM-41 and an ethene bridged PMO are investigated. The results are compared with a commercial chromatographic silica (Nucleosil). The complete distribution of surface and bulk silanols, and of isolated, geminal and vicina...
A novel chemically modified electrode was constructed based on multi-walled carbon nanotubes, MCM48 molecular sieve composite modified glassy carbon electrode .The modified electrode showed that it can be used for simultaneous determination of acetaminophen (ACT) and codeine (COD), simultaneously. The measurements were carried out by the application of differential pulse voltammetry (DPV), cycl...
در این پژوهش به منظور حذف کروم از محلول های آبی ماده نانو حفره mcm-41 آمین دار شده با استفاده از روش پیوندزنی پس سنتزی به وسیله گروه 3-آمینوپروپیل تری متوکسی سیلان تولید شد. آنالیزهای پراش پرتو ایکس، جذب- واجذب گاز نیتروژن، وزن سنجی حرارتی و طیف سنجی عبوری مادون قرمز فوریر (ft-ir)، تشکیل ماده میان حفره با ساختار منظم و عامل دار شدن با گروه آمین را تصدیق کرد. nh2-mcm-41 به عنوان جاذب برای حذف یو...
Translational and rotational dynamics of water in mesoporous silica materials: MCM-41-S and MCM-48-S
We investigated the translational and rotational dynamics of water molecules in mesoporous silica materials MCM-41-S and MCM-48-S using the incoherent quasielastic neutron scattering technique. The range of wave vector transfers Q covered in the measurements was from 0.27 to 1.93 Å broad enough to detect both the translational and rotational contributions to the scattering. We used the relaxing...
Highly ordered mesoporous MCM-41silica with hexagonal structure was synthesized using extracted amorphous silica from sedge (Carex riparia) ash. Obtained mesoporous materials functionalized by 3-(Aminopropyl) trimethoxysilane (APTMS) and their structures characterized by means of X-ray diffraction (XRD), nitrogen adsorption-desorption, thermogravimetric analysis (TGA) and Fourier transform infr...
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