Preparation and characterization of molecularly imprinted silica particles for selective adsorption of naphthalene
作者:Liang-qia Guo、Yan-bo Zeng、An-hua Guan、Guo-nan Chen
DOI:10.1016/j.reactfunctpolym.2011.08.005
日期:2011.12
monomer-template compound was prepared by the reaction of 3-(triethoxysilyl)propyl isocyanate with β-naphthol to form a thermally cleavable urethane bond. The silica gel was prepared by means of the gelation of monomer-template compound with tetraethoxysilane in ethanol using sol–gel technology. The removal of the template by the cleavage of urethane bond at elevated temperature resulted in the generation of recognition
通过共价/非共价混合策略制备了一种新型的萘分子印迹吸附剂。通过使异氰酸3-(三乙氧基甲硅烷基)丙基酯与β-萘酚反应形成可热裂解的氨基甲酸酯键来制备单体模板化合物。使用溶胶-凝胶技术,通过将单体模板化合物与四乙氧基硅烷在乙醇中凝胶化,制备了硅胶。在高温下通过氨基甲酸酯键的裂解除去模板导致识别位点的产生,其可以通过非共价相互作用重新结合萘。结合实验表明,压印的二氧化硅颗粒显示出非常快的萘吸收曲线,并且显示出对苯的高选择性识别能力,优于苯和其他PAH(例如蒽,