Comparison between carbon nanotube-based, graphite-based, and rice hull carbon-based electrodes with rice hull silica as catalyst for electrochemical detection of copper
Abstract
© 2018 Trans Tech Publications, Switzerland. This study aimed to determine the copper ion-sensing ability of a carbon nanotube (CNT)-based sensor with carbonized rice hull (CRH) as catalyst. The 50:50 CNT-CRH electrode was compared to 100% graphite, 100% CRH, 100% CNT, 50:50 graphite-CRH, and 70:30 graphite-CRH electrodes. Copper chloride (CuCl2) concentrations of 0.01M, 0.02M, 0.03M, 0.04M, 0.04M, 0.05M, 0.06, 0.07M, 0.08M, 0.09M, and 0.1M were used to test the response of the electrodes. Five trials were done for each concentration. The 50:50 CNT-CRH electrode exhibited good sensor characteristics such as high sensitivity, low resolution, and high correlation in concentration-voltage relationship. Electrical characterization using three-electrode system showed a linear relationship between the concentrations and voltage response. The 50:50 CNT-CRH electrode exhibited a sensitivity of 0.0619 V/0.01M or 9.7 mV/100ppm and a resolution of 10 ppm/1mV. The electrode also exhibited a high correlation R2 value of 0.933.
Source or Periodical Title
Key Engineering Materials
ISSN
10139826
Page
283-288
Document Type
Article
Subject
Carbon nanotubes, Carbon paste electrode, Copper detection, Rice hull silica, Voltage response
Recommended Citation
Apostol, Leandre Emile D.; Sacueza, Jose Victor O.; Visaya, John Paul Klien Zeus S.; Manalo, Franz Kevin B.; and Florido, Emmanuel A., "Comparison between carbon nanotube-based, graphite-based, and rice hull carbon-based electrodes with rice hull silica as catalyst for electrochemical detection of copper" (2021). Journal Article. 1201.
https://www.ukdr.uplb.edu.ph/journal-articles/1201