Inventors: Huang XJ, Lin JB, Yuan DX
Patent Title: Method for preparing iron ion imprinted silica gel
Publication date: 2010
Publication number: CN101711975

Abstract: The invention discloses a method for preparing an iron ion imprinted silica gel, which relates to an imprinted silica gel. The method for preparing the iron ion imprinted silica gel comprises the following steps of: soaking a silica gel in acid solution, washing the silica gel until the silica gel is neutral, and drying the silica gel to obtain an activated silica gel; putting a salt containing iron ions into a solvent, heating and stirring the salt and the solvent until the solid is dissolved to obtain a mixture; adding mercapto-propyl silane into the mixture, and heating, stirring and refluxing the mixture; adding the activated silica gel into the mixture, and heating, stirring and refluxing the mixture continuously to obtain a crude product of the iron ion imprinted silica gel; filtering the crude product, washing the crude product with a solvent until no impurity is detected, then soaking the crude product with an acid until no iron ion imprinted silica gel is detected, and finally washing the iron ion imprinted silica gel until the iron ion imprinted silica gel is neutral; and drying the iron ion imprinted silica gel to obtain a final product. In the method, the mercapto-propyl silane is used as a functional monomer, and a synthesis technique of molecular engram is utilized. The preparation process is simple and convenient, and is easy to operate, the obtained iron ion imprinted silica gel has high adsorption capacity and certain adsorption selection performance of the iron ions, and the synthesized iron ion imprinted silica gel can be filled to form a small solid phase extraction column which is used for the selective extraction of the iron ions in a water sample.
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