期刊
ANALYTICAL METHODS
卷 8, 期 44, 页码 7937-7943出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ay02804g
关键词
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资金
- BK 21 PLUS, Creative Human Resource Development Program for IT Convergence
- Basic Research Laboratory through the National Research Foundations of Korea - Ministry of Science, ICT and Future Planning [NRF-2015R1A4A1041584]
- MOTIE (Ministry of Trade, Industry Energy), KIAT [N0001126]
A self-powered supercapacitor based on a caffeine sensor electrode has been developed using an electrochemically deposited rGO/beta-CD/MnO2 ternary composite with ionic liquid assistance. This typical composite electrode was prepared from electrochemically reduced e-rGO followed by the addition of b-cyclodextrin and MnO2 from Mn(CH3COOH)(2)center dot 4H(2)O on FTO surfaces. The composite material is indexed to the corresponding crystalline phase of MnO2 in the XRD investigation and Mn 3p, Mn 2p, C 1s, and O 1s signals were identified from XPS analysis. The cyclic voltammetry study reveals that the potential of the caffeine samples and the square wave voltammetry peak currents indicate an increasing trend for caffeine oxidation. The sensor expressed a sensitivity of 0.187 mu A cm(2) mu M-1 with a linear range of 10-550 mu M (n = 3.12). The corresponding supercapacitor also exhibited a specific capacitance of 352 F g(-1) and it showed a very good life time from a long term cyclic test. The proposed ternary composite electrodes may be suitable electrodes for self-powered sensor devices.
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