Investigation of cyclic voltammetry, impedance spectroscopy and electrical properties of thermally exfoliated biomass-synthesized graphene
- 5 Downloads
In this paper we have reported the synthesis of graphene by a novel and facile thermal exfoliation process of Allium cepa (Onion) and was characterized by scanning electron microscopy, atomic force microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy to investigate the morphological and structural properties and chemical networks present on it. The AFM and SEM images revealed the formation of thin strip-like layered structure of graphene with the thickness of 1.1 nm. The electrochemical properties of graphene were characterized by cyclic voltammeter, impedance spectroscopy, Tafel plot, Nyquist plot, Bode plot, and voltage-dependent impedance using 0.5 M H2SO4 electrolyte as an illustrative standard material. The cyclic voltammetric curve of graphene electrodes determined a quasi-reversible electrochemical behavior under linear diffusion control square shape at higher process temperature. The ratio of atomic % C-to-O varied from 7.57 to 24.04 indicating a decrease in the oxygen content for the graphene processed at higher temperature. The areal capacitance and voltage-dependent impedance varied from 8.59 × 10− 5 to 18.8 × 10− 5 F/cm2 and 15.79 to 7.7 Ohm, respectively, with the process temperature varying from 600 to 1000 °C. The corrosion potential (Ecorr) and corrosion current density (Icorr) values are − 0.12 V and − 9.1A/cm2, respectively, for the graphene processed at 1000 °C.
KeywordsGraphene Cyclic voltammetry Tafel plot Nyquist plot Bode plot
One of the authors Ms. Rabina Bhujel acknowledges Dr. RamdasPai and Mrs.Vasanthi Pai endowment fund for providing the financial support for conducting this research work.
Compliance with ethical standards
Conflict of interest
The authors have no conflict of interest with anyone.
- Akgül Ö, Alver Ü, Tanrıverdi A (2016) Calculation of electronic properties of multilayer graphene with Monte Carlo method. In: AIP Conf. Proc., vol 1722, pp 280001–280004Google Scholar
- Bonanni A, Pumera M (2013) High-resolution impedance spectroscopy for graphene characterization. ElectrochemCommun 26:52–54Google Scholar
- Casero E, Parra-Alfambra AM, Petit-Domínguez MD, Pariente F, Lorenzo E, Alonso C (2012) Differentiation between graphene oxide and reduced graphene by electrochemical impedance spectroscopy (EIS). ElectrochemCommun 20:63–66Google Scholar
- Devadas B, Rajkumar M, Chen SM, Saraswathi R (2012) Electrochemically reduced graphene oxide/neodymium hexacyanoferrate modified electrodes for the electrochemical detection of paracetomol. Int J Electrochem Sci 7:3339–3349Google Scholar
- Johra FT, Lee JW, Jung WG (2014) Facile and safe graphene preparation on solution based platform, J Ind Eng Chem 20׃2883–2887Google Scholar
- Latif IA, Merza SH (2016) Fabrication of functionalize reduce graphene oxide and its application in ampicillin detection. Nanosci Nanotech 6:24–33Google Scholar
- Marcelina V, Syakir N, Wyantuti S, Hartati YW, Hidayat R, Fitrilawati F (2017) Characteristic of thermally reduced graphene oxide as supercapacitors electrode materials. In: IOP conf. series: mater sci eng, vol 196, pp 012034Google Scholar
- N.Puri, SKMishra, A.Niazi AK, Srivastava, Rajesh (2014) Physicochemical characteristics of reduced graphene oxide based Pt-nanoparticles-conducting polymer nanocomposite film for immunosensor applications. J Chem Tech Biotech 90:1699–1706Google Scholar
- Supriya S, Kumar S, Kar M (2016) Impedance spectroscopy studies in cobalt ferrite-reduced graphene oxide nanocomposite. In: AIP Conf. Proc., vol 1728, pp 020566–020569Google Scholar
- Wall M (2011) The Raman spectroscopy of graphene and the determination of layer thickness. Thermo Scientific Application Note: 52252. https://tools.thermofisher.com/content/sfs/brochures/AN52252_E%201111%20LayerThkns_H_1.pdf