Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 426, Issue -, Pages 293-299Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2014.03.056
Keywords
Folic acid; Reduced graphene oxide; Graphene-based sensing strategy
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21035005]
- Program for Innovative Research Team in University of Chongqing (2013)
- Research Fund for the Doctoral Program of Higher Education of China (young scholars) (RFDP) [20120182120017]
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A convenient and environment-friendly method is reported to synthesize the reduced graphene oxide (rGO) sheets in aqueous solution using folic acid (FA) as both a reducing and stabilizing agent, to improve the performance of graphene-based sensing strategy. The as-prepared FA-rGO sheets were characterized by transmission electron microscopy (TEM), UV-vis absorption spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) and thermogravimetric analysis (TGA), which provided the clear identification of the removal of oxygen-containing functional groups from the graphene oxide (GO) to form FA-rGO sheets. Further, it was found that the obtained FA-rGO sheets exhibited better biocompatibility and could act as the more efficient energy acceptor in long range resonance energy transfer (LrRET) process than that of graphene. Additionally, the FA-rGO can also catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by H2O2, and compared with GO sheets, they exhibited the more prominent intrinsic peroxidase-like activity, thus providing the more sensitive approach for colorimetric detection of H2O2. (C) 2014 Elsevier Inc. All rights reserved.
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