Dehydroxylation and structure of alumina gels prepared from trisecbutoxyaluminium

Frost, Raymond; Kloprogge, J. Theo; Russell, Shane C.; Szetu, Jennifer

doi:10.1016/s0040-6031(98)00663-7

Cited by 47 publications

(24 citation statements)

References 17 publications

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“…For as-synthesized Al 2 O 3 powder (before calcination), bands at 744, 628 and 1070 cm -1 are allotted to boehmite, and similar kind of characteristic results are reported in literature 30. Bending modes of Al-O-H is observed at 1070 cm -1 for symmetric and 1160 cm -1 for asymmetric 31. The OH torsional mode is not identified at 750 cm -1 due to the overlap of stretching vibrations of Al-O with OH.…”

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confidence: 83%

Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

et al. 2016

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Clay based ceramic support was prepared by uniaxial pressing method and Titanium dioxide (TiO 2 ) and γ-Alumina (γ-Al 2 O 3 ) composite membranes were fabricated individually by coating of TiO 2 and γ-Al 2 O 3 particles on the prepared ceramic support via hydrothermal method. The prepared TiO 2 and γ-Al 2 O 3 powders as well as membranes were systematically characterized using analytical techniques such as thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), BET surface area, X-ray diffraction analysis (XRD), particle size analyzer, scanning electron microscope (SEM), porosity, field emission scanning electron microscope (FESEM), N 2 gas permeation and pure water permeability. Filtration experiments were performed to evaluate the performance of the support and membranes by separation of synthetic oil-in-water emulsions. The effects of applied pressure and feed (oil) concentration on the treatment of oil-in-water emulsion for the support and membranes were examined. TiO 2 membrane demonstrates better rejection (97-99 %) and permeate flux (8.48-55.13×10 -5 m 3 /m 2 s) as compared to the support (rejection of 95-97 % and permeate flux of 1.87-9.84×10 -5 m 3 /m 2 s). Also the γ-Al 2 O 3 membrane shows good rejection (96-98 %) and permeate flux (6.12-22.03×10 -5 m 3 /m 2 s). Despite similar rejection shown by the support and composite membranes, the flux of the TiO 2 membrane is one order higher than that of the support due to the enhanced hydrophilic character of the membrane after TiO 2 coating.Hence, the prepared composite membranes can be used as potential candidates for the treatment of oil-in-water emulsions.

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confidence: 83%

Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

et al. 2016

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“…The bands at 744, 628 and 1075 cm −1 can be assigned to the defined characteristics of boehmite. 38 It is observed an intense band at 1075 cm −1 and a shoulder at 1171 cm −1 , which are assigned to the symmetric and asymmetric bending modes of Al-O-H, respectively. 39 The intense band at 1634 cm −1 and broad band centered at 3414 cm −1 are assigned to the bending and stretching modes of hydroxyl groups due to the adsorbed water molecule.…”

Section: Resultsmentioning

confidence: 89%

Separation of bovine serum albumin (BSA) using γ‐Al₂O₃–clay composite ultrafiltration membrane

Monash

Majhi

Pugazhenthi

2009

J of Chemical Tech & Biotech

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BACKGROUND: Ceramic membranes have received more attention than polymeric membranes for the separation and purification of bio-products owing to their superior chemical, mechanical and thermal properties. Commercially available ceramic membranes are too expensive. This could be overcome by fabricating membranes using low-cost raw materials. The aim of this work is to fabricate a low-cost γ -Al 2 O 3 -clay composite membrane and evaluate its potential for the separation of bovine serum albumin (BSA) as a function of pH, feed concentration and applied pressure. To achieve this, the membrane support is prepared using low-cost clay mixtures instead of very expensive alumina, zirconia and titania materials. The cost of the membrane can be further reduced by preparing a γ -alumina surface layer on the clay support using boehmite sol synthesized from inexpensive aluminium chloride instead of expensive aluminium alkoxide using a dip-coating technique.

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“…The result of these tests was the temporal evolution of the spectra. This follow-up could show, for example, the formation of gypsum, ettringite and aluminium hydroxide due to the absorbance variation of the bands at 1110 cm −1 and 1020 cm −1 [15][16][17][18]. By monitoring the band absorbance over time, the competition between species formation and consumption in a paste could be observed.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Hydration modelling of an ettringite-based binder

Georgin

Prud’Homme

2015

Cement and Concrete Research

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Dehydroxylation and structure of alumina gels prepared from trisecbutoxyaluminium

Cited by 47 publications

References 17 publications

Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

Separation of bovine serum albumin (BSA) using γ‐Al₂O₃–clay composite ultrafiltration membrane

Hydration modelling of an ettringite-based binder

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Dehydroxylation and structure of alumina gels prepared from trisecbutoxyaluminium

Cited by 47 publications

References 17 publications

Preparation and characterization of TiO2and γ-Al2O3composite membranes for the separation of oil-in-water emulsions

Preparation and characterization of TiO2and γ-Al2O3composite membranes for the separation of oil-in-water emulsions

Separation of bovine serum albumin (BSA) using γ‐Al2O3–clay composite ultrafiltration membrane

Hydration modelling of an ettringite-based binder

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Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

Preparation and characterization of TiO₂and γ-Al₂O₃composite membranes for the separation of oil-in-water emulsions

Separation of bovine serum albumin (BSA) using γ‐Al₂O₃–clay composite ultrafiltration membrane