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  • Ordered hexagonal mesoporous aluminosilicates with low Si/Al ratio: synthesis, characterization, and catalytic application.

Ordered hexagonal mesoporous aluminosilicates with low Si/Al ratio: synthesis, characterization, and catalytic application.

Journal of nanoscience and nanotechnology (2014-04-18)
Aifeng Liu, Hongwei Che, Chuanzhi Liu, Quanrong Fu, Ruijiao Jiang, Cheng Wang, Liang Wang
ABSTRACT

Ordered hexagonal mesoporous aluminosilicates with lower Si/Al ratio below 5 have been successfully synthesized via the co-assembly of preformed aluminosilicate precursors with Gemini surfactant [C12H25N+(CH3)2(CH2)6N+(CH3)2C12H25] x 2Br(-) as the template. Powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption-desorption isotherm measurements, Fourier transform infrared spectroscopy, 27Al nuclear magnetic resonance, thermogravimetric analysis, and temperature-programmed desorption of cyclohexylamine are employed to characterize the resulting samples. The phenol alkylation reaction is carried out to evaluate their catalytic performances. These studies indicate that the sample with a low Si/Al ratio of 3 still retains a highly ordered hexagonal mesoporous structure. And it also possesses the highest acidity of 0.96 mmol among the samples with lower Si/Al ratios below 5 due to its higher specific surface area together with more content of tetrahedrally coordinated Al in the framework. The catalytic tests confirm that the acidity of the samples plays a key role in determining their catalytic performances.

MATERIALS
Product Number
Brand
Product Description

Aluminum, wire reel, 5m, diameter 0.05mm, as drawn, 99.99+%
Aluminum, wire reel, 5m, diameter 0.25mm, as drawn, 99.999%
Aluminum, wire reel, 50m, diameter 0.25mm, hard, 99.99+%
Aluminum, wire reel, 5m, diameter 1.0mm, as drawn, 99.999%
Aluminum, wire reel, 5m, diameter 0.025mm, as drawn, 99.99+%
Aluminum, wire reel, 50m, diameter 0.063mm, annealed, 99.99%
Aluminum, wire reel, 5m, diameter 2.0mm, as drawn, 99.999%
Aluminum, wire reel, 5m, diameter 0.125mm, as drawn, 99.99+%
Aluminum, wire reel, 5m, diameter 3.0mm, as drawn, 99.999%
Aluminum, wire reel, 50m, diameter 0.5mm, as drawn, 99.5%
Aluminum, wire reel, 50m, diameter 1.0mm, as drawn, 99.95+%
Aluminum, honeycomb, 600x600mm, thickness 10mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, honeycomb, 600x600mm, thickness 52.3mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin glass fiber 0.75mm, 99.9%
Aluminum, honeycomb, 300x300mm, thickness 26.5mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin carbon fiber / epoxy, 99.9%
Aluminum, honeycomb, 600x600mm, thickness 26.5mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin carbon fiber / epoxy, 99.9%
Aluminum, honeycomb, 600x600mm, thickness 20mm, cell size 3.2mm, cell wall 0.025mm, core density 0.072g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, honeycomb, 300x300mm, thickness 10mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, honeycomb, 300x300mm, thickness 52.3mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin glass fiber 0.75mm, 99.9%
Aluminum, honeycomb, 300x300mm, thickness 5mm, cell size 13mm, cell wall 0.1mm, core density 0.062g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, foam, 150x150mm, thickness 6.35mm, bulk density 0.2g/cm3, porosity 0.93, 2 pores/cm, aluminum 6101 grade, 98.5%
Aluminum, honeycomb, 300x300mm, thickness 13.9mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin aluminum 0.55mm, 99.9%
Aluminum, foam, 150x150mm, thickness 30mm, bulk density 0.2g/cm3, porosity 0.93, aluminum 6101 grade, 98.5%
Aluminum, foam, 300x400mm, thickness 6.35mm, bulk density 0.2g/cm3, porosity 0.93, aluminum 6101 grade, 98.5%
Aluminum, honeycomb, 600x600mm, thickness 5mm, cell size 13mm, cell wall 0.1mm, core density 0.062g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, honeycomb, 300x300mm, thickness 5mm, cell size 19mm, cell wall 0.064mm, core density 0.029g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, foam, 150x150mm, thickness 6.35mm, bulk density 0.2g/cm3, porosity 0.93, 8 pores/cm, aluminum 6101 grade, 98.5%
Aluminum, honeycomb, 600x600mm, thickness 5mm, cell size 3.2mm, cell wall 0.025mm, core density 0.072g/cm3, phenolic adhesive (resin), 99.5%
Aluminum, honeycomb, 300x300mm, thickness 26.5mm, cell size 6.3mm, cell wall 0.064mm, core density 0.083g/cm3, phenolic adhesive (resin), facing skin aluminum 0.55mm, 99.9%
Aluminum, honeycomb, 300x300mm, thickness 20mm, cell size 4.8mm, cell wall 0.038mm, core density 0.070g/cm3, phenolic adhesive (resin), 99.5%
Sigma-Aldrich
Drying pearls orange