Flexible and freestanding catalase-Fe3O4/reduced graphene oxide paper: Enzymatic hydrogen peroxide sensor applications
- Atatürk University, Faculty of Science, Department of Chemistry, 25240, Erzurum (Turkey)
Highlights: • The preparation of a new type of flexible Cat-Fe{sub 3}O{sub 4}/rGO paper was achieved by a simple method. • The characterization of the Fe{sub 3}O{sub 4} nanocrystals formed on rGO and Cat-Fe{sub 3}O{sub 4}/rGO paper were investigated by several techniques. • Cat-Fe{sub 3}O{sub 4}/rGO paper electrode was used as a flexible electrochemical sensor for H{sub 2}O{sub 2} determination. - Abstract: We proposed a new type of freestanding Catalase (EC 1.11.1.6) (Cat) modified paper electrode based on Fe{sub 3}O{sub 4} crystals decorated freestanding reduced graphene oxide (rGO) paper (Cat-Fe{sub 3}O{sub 4}/rGO) using a facile electrodeposition method. This enzyme modified paper electrode was used for the specific determination of hydrogen peroxide (H{sub 2}O{sub 2}). Structural, chemical, and morphological characterization of the Fe{sub 3}O{sub 4} crystals formed on rGO paper was investigated by (i) using scanning electron microscopy (SEM), (ii) energy-dispersive X-ray spectroscopy (EDS), (iii) X-ray photoelectron spectroscopy (XPS), (iv) X-ray diffraction spectroscopy (XRD), (v) Raman spectroscopy, (vi) electrochemical impedance spectroscopy (EIS) and (vii) cyclic voltammetry (CV) techniques. The Cat enzyme was successfully adsorbed on the Fe{sub 3}O{sub 4} nanocrystals surface which was demonstrated by fluorescence microscopy. The Cat-Fe{sub 3}O{sub 4}/rGO paper electrode showed excellent electrocatalytic activity toward H{sub 2}O{sub 2}. It is found that Cat-Fe{sub 3}O{sub 4}/rGO paper electrode shows a wide linear range, high sensitivity, and a low detection limit for H{sub 2}O{sub 2} detection.
- OSTI ID:
- 22805221
- Journal Information:
- Materials Research Bulletin, Vol. 106; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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