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Flexible and freestanding catalase-Fe 3 O 4 /reduced graphene oxide paper: Enzymatic hydrogen peroxide sensor applications
- Source :
- Materials Research Bulletin. 106:57-65
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- We proposed a new type of freestanding Catalase (EC 1.11.1.6) (Cat) modified paper electrode based on Fe3O4 crystals decorated freestanding reduced graphene oxide (rGO) paper (Cat-Fe3O4/rGO) using a facile electrodeposition method. This enzyme modified paper electrode was used for the specific determination of hydrogen peroxide (H2O2). Structural, chemical, and morphological characterization of the Fe3O4 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 Fe3O4 nanocrystals surface which was demonstrated by fluorescence microscopy. The Cat-Fe3O4/rGO paper electrode showed excellent electrocatalytic activity toward H2O2. It is found that Cat-Fe3O4/rGO paper electrode shows a wide linear range, high sensitivity, and a low detection limit for H2O2 detection.
- Subjects :
- Materials science
Graphene
Mechanical Engineering
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
law.invention
Dielectric spectroscopy
symbols.namesake
X-ray photoelectron spectroscopy
Mechanics of Materials
law
Electrode
symbols
General Materials Science
Cyclic voltammetry
0210 nano-technology
Spectroscopy
Raman spectroscopy
Graphene oxide paper
Nuclear chemistry
Subjects
Details
- ISSN :
- 00255408
- Volume :
- 106
- Database :
- OpenAIRE
- Journal :
- Materials Research Bulletin
- Accession number :
- edsair.doi...........c6efec7d3f3fa639a5e53d1a18f6f593