Abstract
Clay-modified electrodes were prepared with montmorillonite K10 and characterized in their ability to enhance the electrogenerated chemiluminescence (ECL) in a solution containing luminol and hydrogen peroxide. Montmorillonite K10 proved to be an effective catalyst for such a purpose, according to the anodic current and ECL intensity measured with the electrodes with and without clay particles. Under optimum conditions (pH 10 and 0.8 V vs. SCE), the ECL was enhanced by a factor of 10. Control experiments showed the enhanced ECL is likely due to a facilitation in the oxidation of luminol and H2O2 by the iron species contained in the clay. Double-step potential techniques suggested that superoxide is very likely to be the key reactive oxygen species involved in the clay-enhanced ECL reaction. In addition, clay/luminol/GOx electrodes were constructed by using aminopropyltrimethoxysilane as an immobilizing agent for the detection of glucose. Although the electrode sensitivity decreased by ca. 15% after 10 days, a linear calibration curve was attained, covering the concentrations of glucose from 10 μM to 0.5 mM with a detection limit at ca. 10 μM at pH 10.
| Original language | English |
|---|---|
| Pages (from-to) | 2654-2659 |
| Number of pages | 6 |
| Journal | Journal of the Electrochemical Society |
| Volume | 145 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1998 Jan 1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
Cite this
Clay-enhanced electrochemiluminescence and its application in the detection of glucose. / Ouyang, Chih Sheng; Wang, Chong Mou.
In: Journal of the Electrochemical Society, Vol. 145, No. 8, 01.01.1998, p. 2654-2659.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Clay-enhanced electrochemiluminescence and its application in the detection of glucose
AU - Ouyang, Chih Sheng
AU - Wang, Chong Mou
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Clay-modified electrodes were prepared with montmorillonite K10 and characterized in their ability to enhance the electrogenerated chemiluminescence (ECL) in a solution containing luminol and hydrogen peroxide. Montmorillonite K10 proved to be an effective catalyst for such a purpose, according to the anodic current and ECL intensity measured with the electrodes with and without clay particles. Under optimum conditions (pH 10 and 0.8 V vs. SCE), the ECL was enhanced by a factor of 10. Control experiments showed the enhanced ECL is likely due to a facilitation in the oxidation of luminol and H2O2 by the iron species contained in the clay. Double-step potential techniques suggested that superoxide is very likely to be the key reactive oxygen species involved in the clay-enhanced ECL reaction. In addition, clay/luminol/GOx electrodes were constructed by using aminopropyltrimethoxysilane as an immobilizing agent for the detection of glucose. Although the electrode sensitivity decreased by ca. 15% after 10 days, a linear calibration curve was attained, covering the concentrations of glucose from 10 μM to 0.5 mM with a detection limit at ca. 10 μM at pH 10.
AB - Clay-modified electrodes were prepared with montmorillonite K10 and characterized in their ability to enhance the electrogenerated chemiluminescence (ECL) in a solution containing luminol and hydrogen peroxide. Montmorillonite K10 proved to be an effective catalyst for such a purpose, according to the anodic current and ECL intensity measured with the electrodes with and without clay particles. Under optimum conditions (pH 10 and 0.8 V vs. SCE), the ECL was enhanced by a factor of 10. Control experiments showed the enhanced ECL is likely due to a facilitation in the oxidation of luminol and H2O2 by the iron species contained in the clay. Double-step potential techniques suggested that superoxide is very likely to be the key reactive oxygen species involved in the clay-enhanced ECL reaction. In addition, clay/luminol/GOx electrodes were constructed by using aminopropyltrimethoxysilane as an immobilizing agent for the detection of glucose. Although the electrode sensitivity decreased by ca. 15% after 10 days, a linear calibration curve was attained, covering the concentrations of glucose from 10 μM to 0.5 mM with a detection limit at ca. 10 μM at pH 10.
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U2 - 10.1149/1.1838695
DO - 10.1149/1.1838695
M3 - Article
AN - SCOPUS:0032140976
VL - 145
SP - 2654
EP - 2659
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 8
ER -