Journal
ELECTROANALYSIS
Volume 24, Issue 5, Pages 1178-1185Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201100735
Keywords
Reduced graphene oxide (RGO); Nitrophenol isomers (NPs); Cyclic voltammograms (CVs); Cyclodextrin (CD); Selective detection
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Funding
- National Natural Science Foundation of China [21175059, 21073111]
- Graduate Independent Innovation Foundation of Shandong University
- National Basic Research Program of China [2009CB93103]
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beta-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 hostguest 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 110 mg?dm-3 for p-NP, 19 mg?dm-3 for o-NP and 16 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.
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