期刊
MICROCHIMICA ACTA
卷 183, 期 6, 页码 1943-1951出版社
SPRINGER WIEN
DOI: 10.1007/s00604-016-1829-0
关键词
Hydrothermal synthesis; Cyclic voltammetry; Chitosan; Transmission electron microscopy; FTIR; Cyclic voltammetry
资金
- National Science Fund of China [21275116, 21575113]
- Specialized Research Fund for the Doctoral Program of Higher Education [20126101120023]
- Natural Science Fund of Shaanxi Province in China [2013KJXX-25]
- Scientific Research Foundation of Shaanxi Provincial Key Laboratory [13JS097, 14JS094, 15JS100]
A sandwich structured nanocomposite consisting of mildly reduced graphene oxide modified with silver nanoparticles supported on Co3O4 was synthesized and used for fabricating a nonenzymatic sensor for H2O2. The morphology and composition of the nanocomposite was characterized by transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction and FTIR. The composite was placed on a glassy carbon electrode which then displayed excellent performance in terms of electroreduction of H2O2. The H2O2 sensor, if operated at pH 7.4 at a working potential of 0.4 V (vs. SCE) has the following features: (a) linearity in the 0.1 mu M to 7.5 mM concentration range; (b) a sensitivity of 146.5 mu Aa (TM) mMaEuro3/4(1)a (TM) cmaEuro3/4(2); (c) a 35 nM detection limit at a signal-to-noise ratio of 3, and (d) a response time of 2 s. The sensor is long-term stable, well reproducible and selective.
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