【摘 要】
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Nano-sized silica-alumina particles were in-situ synthesized in supersolubilizing reverse micellae. Both the most probable pore diameters and the particle sizes
【机 构】
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School of Material & Metallurgy,Liaoning
【基金项目】
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The authors thank the financial support of Liaoning Province National Science Fund
论文部分内容阅读
Nano-sized silica-alumina particles were in-situ synthesized in supersolubilizing reverse micellae. Both the most probable pore diameters and the particle sizes were distributed in nano-scale SiO2-Al2O3 particulates. The influence of SiO2/Al2O3 mass ratio and the surfactant content on the particle size and morphology, pore structure, and acidity was characterized by the low temperature nitrogen adsorption/desorption (BET), SEM, TEM and NH3-TPD methods. The test results indicated that the most probable pore diameter of SiO2-Al2O3 nanoparticles was around 10 nm, the specific surface area was about 223-286 m2/g, the pore volumes were about 0.48-0.63 cm3/g, and the particle sizes of porous SiO2-Al2O3 calcined at 550 ℃ were distributed always in the range between 10 nm to 50 nm. The calcined SiO2-Al2O3 nano-powders showed their acidity being stronger than the porous γ-Al2O3 support.
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