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A Novel Hydrogen Peroxide Amperometric Sensor Based on Hierarchical 3D Porous MnO 2 −TiO 2 Composites
Author(s) -
Ko WenYin,
Chen YiShin,
Li MengShan,
Lai JunYan,
Lin KuanJiuh
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800783
Subject(s) - x ray photoelectron spectroscopy , materials science , tin oxide , nanocomposite , scanning electron microscope , electrode , chemical engineering , raman spectroscopy , nanotechnology , electrochemistry , hydrogen peroxide , oxide , composite material , chemistry , metallurgy , physics , optics , engineering , organic chemistry
A novel nanocomposite electrode based on hierarchical 3D porous MnO 2 −TiO 2 for the application in hydrogen peroxide (H 2 O 2 ) sensors has been explored. This electrode was fabricated by growing TiO 2 cross‐linked nanowires on a commercial fluorine tin oxide (FTO) glass via a hydrothermal process and subsequent deposition of 3D honeycomb‐like MnO 2 nanowalls using an electrodeposition method (denoted as 3D MNS‐TNW@FTO). The obtained 3D MNS‐TNW@FTO electrode was characterized by scanning electron microscopy (SEM), Raman spectroscopy, X‐ray diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS). Based on such a unique 3D porous framework and the existence of MnO 2 , the electrode demonstrates a good performance in the detection of H 2 O 2 , with two linear ranges from 9.8 to 125 μM and 125 μM–1.0 mM, a good selectivity of 8.02 μA mM −1 cm −2 , and a low detection limit of 4.5 μM. In addition, the simplicity of the developed low‐cost fabrication process provides an efficient method for the mass production of electrocatalytical MnO 2 −TiO 2 nanocomposites on commercial FTO glass for H 2 O 2 sensing applications and can be adapted for other electrochemical sensors for various biochemical targets. It thus is beneficial for the practical usage in bioanalysis.