Macroporous silica�?�alumina composites with mesoporous walls

[摘要] Macroporous silicaâ€�?�alumina composites with mesopores have been prepared by employing polymethylmethacrylate beads as templates in the presence of the cationic surfactant, N-cetyl-N,N,N-trimethylammonium bromide. The Si/Al ratio in the composites has been varied between 4.5 and 48 and the occurrence of mesopores has been verified by X-ray diffraction. The surface areas of the samples vary between 676 and 1038 m²g^â€�??1, with the highest value in the sample with Si/Al = 48.

[学科分类] 材料工程

[关键词] Macroporous materials;mesoporous materials;silicaâ€�?�alumina composites.