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采用十六烷基三甲氧基硅烷和3-氨丙基三甲氧基硅烷作为改性剂对SBA-15分子筛进行表面改性,制备出双官能化吸附剂十六烷基/3-氨丙基-SBA-15。用XRD、FT-IR、N2吸附/脱附、元素分析等手段对所制备材料进行结构表征,结果表明官能化后的SBA-15仍保留长程有序的六方介孔结构,十六烷基和3-氨丙基基团均成功负载到SBA-15表面。以壬基酚作为目标污染物,考察了所制备材料的吸附性能。研究结果表明,十六烷基/3-氨丙基-SBA-15的吸附容量高于十六烷基-SBA-15、3-氨丙基-SBA-15和未改性的SBA-15,这归因于双官能化吸附剂表面的十六烷基与壬基酚之间的疏水化作用力和3-氨丙基与壬基酚之间的氢键、离子键作用力的协同作用。
SBA-15 molecular sieve was modified by cetyltrimethoxysilane and 3-aminopropyltrimethoxysilane as modifiers to prepare bifunctional adsorbents cetyl / 3-aminopropyl -SBA-15. The prepared materials were characterized by XRD, FT-IR, N2 adsorption / desorption and elemental analysis. The results showed that the functionalized SBA-15 retained long-range ordered hexagonal mesoporous structure, hexadecyl and 3-aminopropyl groups were successfully loaded onto the surface of SBA-15. With nonylphenol as the target pollutant, the adsorption properties of the prepared materials were investigated. The results show that the adsorption capacity of cetyl / 3-aminopropyl-SBA-15 is higher than that of hexadecyl-SBA-15,3-aminopropyl-SBA-15 and unmodified SBA- This is attributed to the synergistic effect of the hydrophobic interaction between the hexadecyl group and the nonylphenol on the surface of the bifunctional adsorbent and the hydrogen bond between the 3-aminopropyl group and the nonylphenol and the ionic bond force.