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Simultaneous Determination of Nitrophenol Isomers Based on β‐Cyclodextrin Functionalized Reduced Graphene Oxide
Author(s) -
Liu Zhaona,
Ma Xuemei,
Zhang Huacheng,
Lu Weijie,
Ma Houyi,
Hou Shifeng
Publication year - 2012
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.201100735
Subject(s) - graphene , oxide , nitrophenol , 4 nitrophenol , cyclodextrin , redox , chemistry , nuclear chemistry , materials science , inorganic chemistry , nanotechnology , chromatography , organic chemistry , catalysis
β‐CD modified reduced graphene oxide (RGO) sheets have been prepared and characterized by TEM, AFM, IR, EIS and CVs. In comparison with bare glass carbon electrode (GCE) and RGO modified GCE, CD‐RGO/GCE showed much higher peak currents to the reduction of nitrophenol isomers (NPs), attributed to the larger specific surface area of RGO and high quantities of host–guest recognition sites. Three pairs of redox peaks are observed on the CVs of CD‐RGO for p ‐NP (0.3 V), o ‐NP (−0.2 V) and m ‐NP (0.05 V), separating well with each other. Under the optimized condition, the anodic peak currents were linear over ranges around 1–10 mg dm −3 for p ‐NP, 1–9 mg dm −3 for o ‐NP and 1–6 mg dm −3 for m ‐NP, with the detection limits of 0.05 mg dm −3 , 0.02 mg dm −3 and 0.1 mg dm −3 , respectively. Thus, the CD‐RGO is expected to be a promising sensor material for detecting trace NPs in waste water.