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A Sensitive and Renewable Chlortoluron Molecularly Imprinted Polymer Sensor Based on the Gate‐Controlled Catalytic Electrooxidation of H 2 O 2 on Magnetic Nano‐NiO
Author(s) -
Li Xue,
Zhang Lianming,
Wei Xiaoping,
Li Jianping
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201200428
Subject(s) - non blocking i/o , catalysis , detection limit , selectivity , molecularly imprinted polymer , nanoparticle , nickel oxide , materials science , catalytic oxidation , chemistry , nuclear chemistry , chemical engineering , nanotechnology , chromatography , organic chemistry , engineering
A new sensor was fabricated by MIP synthesized on the surface of magnetic nickel(II) oxide (NiO) nanoparticles which based on the oxidation current change of H 2 O 2 . Chlortoluron was selected as template which can be detected indirectly by the decrease of the H 2 O 2 oxidation current on the NiO nanoparticle‐modified GCE caused by the blocking access after rebinding. A high sensitivity was obtained because of the high catalytic effect of NiO nanoparticles on H 2 O 2 oxidation. Chlortoluron was determined from 1.0×10 −8 /L to 1.0×10 −4 mol/L, with a detection limit of 2.4×10 −9 mol/L. The proposed method combines the high sensitivity of the catalytic effect and the high selectivity of the MIP technique. Water samples were assayed using the MIP sensor, and recoveries of 96.9 % to 104.7 % were obtained.