Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"mesoporous material"”.
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Application of PEO-PPO-PEO Triblock Copolymers in Synthesis of Silica and Organosilica Nanomaterials
… oxide) (PEO-PPO-PEO), in the synthesis of mesoporous material, such as double-helical silica nanotube structures as well as bridged organosilica nanotubes by using swollen micelles of Pluronic surfactants and their mixtures. Chapter 1 introduced the background and several important …
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The use of novel mesoporous molecular sieve MCM-41 for the sorption and separation of neutral and overbased sulphonate and phenate lubricant detergents
… The development of large pore sized materials such as MCM-41 enables larger molecules to be separated by the process of size exclusion than by traditional zeolites. In this work, mesoporous materials were synthesised and characterised using powder x-ray diffraction and nitrogen …
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Dynamics of biopolymers and their hydration water studied by neutron and X-ray scattering
… in hydrophilic MCM-41-S (a porous silica material). We then observe an interesting phenomenon that TL of water confined in a hydrophobic mesoporous material CMK-1 occurs in-between the above two. Our results indicate that besides the obvious surface effect brought about by the hydrophobic …
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Growth, spectroscopy and utilisation of novel low dimensional nanostructures: carbon nanotubes and quantum dots
… of 4 to 7 nm. Using CNT probes the surface of a mesoporous material with pore diameter of 7 to 12 nm and repeated distance of 15 to 18 nm was imaged, proving the high resolution that can be achieved with such probes and that AFM can be applied successfully to mesoporous materials. The latter has …
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Nanostructured Porous High Surface Area Ceramics for Catalytic Applications
… of novel nanosized and nanostructured ceramic materials. Ordered mesoporous silica SBA-15 was found to be useful as a hard template for the nanocasting of silicon carbide and allowed the preparation of high temperature stable mesoporous silicon carbide ceramics. Chemical vapor infiltration of …
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Stereo-directing effect of molecularly imprinted polymers on cinnamic acids
… confirmed the formation of amorphous, mesoporous material with high surface areas, particularly after template removal. The disappearance of the vinyl C=C stretch (1635 cm-1) in the FTIR spectra confirmed complete polymerization while the peaks for the polymer backbone were confirmed by …
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Polycondensation of Bridged Amino-Functionalized Trialkoxysilanes.
… mission to resolve global warming predicament. Mesoporous silsesquioxanes, which stabilized by organobridges and has high content aminon absorption site, can serve as a potential CO<sub>2</sub> adsorbent. Synthesis of such material is done by hydrolysis and polycondensation of trialkoxysilane. …
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Modified Organoclay Containing Chelating Ligand for Adsorption of Heavy Metals in Solution.
… and ferric oxide were targeted on development of mesoporous structure. Laboratory tests of the organoclay efficiency for purification of wastewater were conducted with the most promising sample, i.e. organoclay with the highest specific loading of chelating agent. Experiments were conducted with …
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Ion specific effects on charged interfaces
… and of silica-based ordered mesoporours material (OMM) chosen as model systems, was the main purpose of this thesis. In particular, the present work is devoted to reach the following aims: I) To investigate the ion specific effects due to added electrolytes in different systems where soft …