Phosphating alumina: A way to tailor its surface properties
Por:
Valente J.S., Falcón S., Lima E., Vera M.A., Bosch P., López-Salinas E.
Publicada:
1 ene 2006
Resumen:
Phosphated alumina with new surface properties was prepared by sol-gel synthesis. Aluminum coordinately unsaturated sites (CUS) were promoted and tuned through phosphate addition. Two phosphate species on alumina were disclosed by 31P MAS NMR spectroscopy. The population of aluminum CUS was related to the amount of phosphorus incorporated into the alumina network. The relative amount of phosphorus species was controlled by the alumina gel's aging time. X-ray diffraction, performed on calcined solids, identified a microcrystalline structure of ?-alumina. Phosphated aluminas showed both high surface areas (364-394 m2/g) and total pore volume (1.0-1.2 cm3/g), even after calcining at 550 °C. © 2006.
Filiaciones:
Valente J.S.:
Instituto Mexicano del Petróleo, Eje Central L. Cardenas 152, AP, 07730 México, DF, Mexico
Falcón S.:
Instituto Mexicano del Petróleo, Eje Central L. Cardenas 152, AP, 07730 México, DF, Mexico
Lima E.:
Universidad Autónoma Metropolitana, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 México, DF, Mexico
Instituto de Investigaciones en Materiales, UNAM, Circuito Exterior, AP 70-360, 04510 México, DF, Mexico
Vera M.A.:
Universidad Autónoma Metropolitana, Av. San Rafael Atlixco No. 186, Iztapalapa, 09340 México, DF, Mexico
Bosch P.:
Instituto de Investigaciones en Materiales, UNAM, Circuito Exterior, AP 70-360, 04510 México, DF, Mexico
López-Salinas E.:
Instituto Mexicano del Petróleo, Eje Central L. Cardenas 152, AP, 07730 México, DF, Mexico
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