Nghiên cứu một số yếu tố ảnh hưởng đến quá trình tổng hợp vật liệu rây phân tử mao quản trung bình SBA-16 từ nguồn silic điều chế từ vỏ trấu.

Abstract

The synsthesis of SBA-16 silica molecular sieve using block copolymer EO₁₀₆PO₇₀EO₁₀₆ (F127) as structure-directing-agent, SiO₂ prepared from rice husk as silica source and using copolymer blends was investigated. Three series of samples were prepared to study the change trend of mesoporous structure by the variations of ratios of butanol/SiO₂, HCl/SiO₂ and P123/F127. The resulting SBA-16 materials were characterized by TG-DSC, XRD, N₂ physical sorption isotherms. The experiments show that butanol/SiO₂, HCl/SiO₂ in the range of 0.98-2.45; 2.12-2.47, respectively could provide a highly ordered mesoporous material with high surface areas. The pore size of SBA-16 could be varied by using copolymer blends of P123 and F127.