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espace at MMU > Faculties > Faculty of Science and Engineering > Department of Chemistry and Materials > Mesoporous-TiO2 nanoparticles based carbon paste electrodes exhibit enhanced electrochemical sensitivity for phenols

Please use this identifier to cite or link to this item: http://hdl.handle.net/2173/87545
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Title: Mesoporous-TiO2 nanoparticles based carbon paste electrodes exhibit enhanced electrochemical sensitivity for phenols
Authors: Lin, Huogang
Ji, Xiaobo
Chen, Qiyuan
Zhou, Yikai
Banks, Craig E.
Wu, Kangbing
Citation: Electrochemistry communications, 2009, vol. 11, no. 10, pp.1990-1995
Publisher: Elsevier Inc.
Issue Date: 2009
URI: http://hdl.handle.net/2173/87545
DOI: 10.1016/j.elecom.2009.08.034
Additional Links: http://www.elsevier.com/locate/elecom
Abstract: Mesoporous-TiO2 nanoparticles (meso-TiO2) and nano-TiO2 particles (nano-TiO2) were synthesized and characterized using scanning electron microscopy. The electrochemical behaviours of carbon paste electrodes (CPE), nano-TiO2/CPE and meso-TiO2/CPE were investigated using K3[Fe(CN)6] as the electrochemical probe. It was observed that the peak potential separation was remarkably decreased at the meso-TiO2/CPE with higher peak currents in comparison with the other two CPEs. Moreover, the electrochemical performance towards phenol and p-substituted phenol detection was studied with remarkably enhanced oxidation signals at meso-TiO2/CPE. The meso-TiO2 shows considerable surface enhancement effects towards phenols which increase linearly with Hammett’s constants. Additionally at higher NaCl concentrations, the oxidation peak currents of phenols notably increases at meso-TiO2/CPE, while remaining unchanged at CPE and nano-TiO2/CPE. In summary meso-TiO2 nanoparticles are superior electrode materials for electrocatalysis.
Type: Article
Language: en
Description: Full-text of this article is not available in this e-prints service. This article was originally published following peer-review in Electrochemistry Communications, published by and copyright Elsevier.
Keywords: Mesoporous-TiO2 nanoparticles
Phenol
Carbon paste electrodes
Electrochemistry
ISSN: 1388-2481
EISSN: 1873-1902
Appears in Collections: Department of Chemistry and Materials

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