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Binding and recognition ability of molecularly imprinted polymer toward p ‐nitrophenol
Author(s) -
An Fu Qiang,
Gao Bao Jiao,
Feng Xiao Qin
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36403
Subject(s) - molecularly imprinted polymer , nitrophenol , selectivity , 4 nitrophenol , polymer , nip , chemistry , chemical engineering , nuclear chemistry , materials science , polymer chemistry , chromatography , organic chemistry , catalysis , composite material , engineering
Abstract p ‐Nitrophenol is a hazardous phenolic compound and its separation and determination is very necessary to protect public health and environmental quality. In this article, macromolecule polyethyleneimine (PEI) grafted on the surface of silica particles was crosslinked using p ‐nitrophenol as a template and diepoxyalkyl (669) as a crosslinking agent, and molecularly imprinted polymer on the surfaces of silica gel MIP‐PEI/SiO 2 was prepared. The binding and recognition ability of MIP‐PEI/SiO 2 for p ‐nitrophenol were researched using batch and dynamic methods. The experimental results showed that MIP‐PEI/SiO 2 had high affinity, specific recognition ability, and excellent selectivity for p ‐nitrophenol. The saturated binding amount could reach to 155.5 mg g −1 . The selectivity coefficients relative to m ‐nitrophenol and chlorophenol were 45.80 and 117.5, respectively. The empirical Freundlich isotherm was found to describe well the equilibrium binding data. pH of sample solution was found to have a strong influence on the binding amount. MIP‐PEI/SiO 2 was regenerated easily using diluted hydrochloric acid solution as eluent and MIP‐PEI/SiO 2 possesses better reusability. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012