TY - JOUR
T1 - Graphene prepared by one-pot solvent exfoliation as a highly sensitive platform for electrochemical sensing
AU - Wu, Can
AU - Cheng, Qin
AU - Wu, Kangbing
AU - Wu, Gang
AU - Li, Qing
PY - 2014/5/12
Y1 - 2014/5/12
N2 - Graphene was easily obtained via one-step ultrasonic exfoliation of graphite powder in N-methyl-2-pyrrolidone. Scanning electron microscopy, transmission electron microscopy, Raman and particle size measurements indicated that the exfoliation efficiency and the amount of produced graphene increased with ultrasonic time. The electrochemical properties and analytical applications of the resulting graphene were systematically studied. Compared with the predominantly-used reduced graphene oxides, the obtained graphene by one-step solvent exfoliation greatly enhanced the oxidation signals of various analytes, such as ascorbic acid (AA), dopamine (DA), uric acid (UA), xanthine (XA), hypoxanthine (HXA), bisphenol A (BPA), ponceau 4R, and sunset yellow. The detection limits of AA, DA, UA, XA, HXA, BPA, ponceau 4R, and sunset yellow were evaluated to be 0.8. μM, 7.5. nM, 2.5. nM, 4. nM, 10. nM, 20. nM, 2. nM, and 1. nM, which are much lower than the reported values. Thus, the prepared graphene via solvent exfoliation strategy displays strong signal amplification ability and holds great promise in constructing a universal and sensitive electrochemical sensing platform.
AB - Graphene was easily obtained via one-step ultrasonic exfoliation of graphite powder in N-methyl-2-pyrrolidone. Scanning electron microscopy, transmission electron microscopy, Raman and particle size measurements indicated that the exfoliation efficiency and the amount of produced graphene increased with ultrasonic time. The electrochemical properties and analytical applications of the resulting graphene were systematically studied. Compared with the predominantly-used reduced graphene oxides, the obtained graphene by one-step solvent exfoliation greatly enhanced the oxidation signals of various analytes, such as ascorbic acid (AA), dopamine (DA), uric acid (UA), xanthine (XA), hypoxanthine (HXA), bisphenol A (BPA), ponceau 4R, and sunset yellow. The detection limits of AA, DA, UA, XA, HXA, BPA, ponceau 4R, and sunset yellow were evaluated to be 0.8. μM, 7.5. nM, 2.5. nM, 4. nM, 10. nM, 20. nM, 2. nM, and 1. nM, which are much lower than the reported values. Thus, the prepared graphene via solvent exfoliation strategy displays strong signal amplification ability and holds great promise in constructing a universal and sensitive electrochemical sensing platform.
KW - Analytical platform
KW - Electrochemical sensing
KW - Graphene
KW - Solvent exfoliation
UR - https://www.scopus.com/pages/publications/84899485376
U2 - 10.1016/j.aca.2014.03.036
DO - 10.1016/j.aca.2014.03.036
M3 - Article
AN - SCOPUS:84899485376
SN - 0003-2670
VL - 825
SP - 26
EP - 33
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
ER -