TỔNG HỢP VẬT LIỆU MAO QUẢN TRUNG BÌNH SBA-15 CHỨA NHÓM THIOL (-SH) VÀ HOẠT TÍNH HẤP PHỤ ION Pb2+ TRONG DUNG DỊCH NƯỚC

Abstract

Mesoporous thiol-functionalized SBA-15 silicas (HS-SBA-15) have been directly synthesized by co-condensation of tetraethyl orthosilicate (TEOS) and 3-mercaptopropyltrimethoxysilane (MPTMS) with triblock copolymer P123 as-structure-directing agent under hydrothermal condition. The sample was characterized by EDX, IR and N₂ adsorption–desorption measurement. The sorption behaviors of Pb²⁺ on the sample were studied. Freundlich isotherm was found to describe the sorption data better than Langmuir isotherm and pseudo second order kinetic model could fit the rate equation of that Pb²⁺ad sorption on HS-SBA-15 solid.