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Structure‐specific sorbent based on nanostructures for selective recognition of cimetidine from its structural analogues
Author(s) -
Sooraj M. P.,
Mathew Beena
Publication year - 2014
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.40947
Subject(s) - thermogravimetric analysis , materials science , adsorption , scanning electron microscope , langmuir adsorption model , fourier transform infrared spectroscopy , chemical engineering , selectivity , analytical chemistry (journal) , nuclear chemistry , chemistry , organic chemistry , composite material , catalysis , engineering
ABSTRACT Synthetic molecular units for cimetidine recognition (MWCNT‐MIP) were fabricated at the vinyl functionalized surface of MWCNT (MWCNT‐CH=CH 2 ). The products and intermediates were characterized using Fourier‐transform infrared spectroscopy, PXRD, thermogravimetric analysis, scanning electron microscope, and tunneling electron microscope techniques. The well fit curve of Langmuir adsorption isotherm clearly indicated the increased homogeneity of MWCNT‐MIP ( R 2 = 0.998) as compared to the bulk MIP ( R 2 = 0.966). The rebinding process was found to follow a second‐order kinetics with a rapid adsorption rate and decreased time period which suggested the enhancement of recognition sites on the surface of MWCNT‐MIP. The maximum saturated binding capacity ( Q max ) showed a 31.73% increase after the incorporation of MWCNT on MIPs. The relative selectivity coefficient ( k ' ) of MWCNT‐MIP (6.82) was higher than that of the bulk MIP (4.23). In addition, reusability of bulk and MWCNT‐MIPs was demonstrated. It was found that MWCNT‐MIP showed five repeated cycles without any loss in performance. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40947.