|Title: ||Mesoporous-TiO2 nanoparticles based carbon paste electrodes exhibit enhanced electrochemical sensitivity for phenols|
|Citation: ||Electrochemistry communications, 2009, vol. 11, no. 10, pp.1990-1995|
|Publisher: ||Elsevier Inc.|
|Issue Date: ||2009 |
|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.|
|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|
Carbon paste electrodes
|Appears in Collections: ||Department of Chemistry and Materials|
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