Electrocatalytic activity of 2,3,5,6-tetrachloro-1,4-benzoquinone/multi-walled carbon nanotubes immobilized on edge plane pyrolytic graphite electrode for NADH oxidation

2008 ◽  
Vol 53 (14) ◽  
pp. 4706-4714 ◽  
Author(s):  
Rita de Cássia Silva Luz ◽  
Flavio Santos Damos ◽  
Auro Atsushi Tanaka ◽  
Lauro Tatsuo Kubota ◽  
Yoshitaka Gushikem
2012 ◽  
Vol 86 ◽  
pp. 22-29 ◽  
Author(s):  
Fernando Roberto Figueirêdo Leite ◽  
Camila Marchetti Maroneze ◽  
Adriano Bof de Oliveira ◽  
Wallans Torres Pio dos Santos ◽  
Flavio Santos Damos ◽  
...  

2015 ◽  
Vol 19 (9) ◽  
pp. 2819-2829 ◽  
Author(s):  
Cleylton Bezerra Lopes ◽  
Francisco de Assis dos Santos Silva ◽  
Phabyanno Rodrigues Lima ◽  
Johnnatan Duarte de Freitas ◽  
Jonas dos Santos Sousa ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Shirley Palisoc ◽  
Remuel Isaac M. Vitto ◽  
Michelle Natividad

AbstractAn electrochemical sensor based on graphite electrode extracted from waste zinc-carbon battery is developed. The graphite electrode was modified with bismuth nanoparticles (BiNP), multi-walled carbon nanotubes (MWCNT) and Nafion via the drop coating method. The bare and modified graphite electrodes were used as the working electrode in anodic stripping voltammetry for the determination of trace amounts of cadmium (Cd2+) and lead (Pb2+). The modified electrode exhibited excellent electroanalytical performance for heavy metal detection in comparison with the bare graphite electrode. The linear concentration range from 5 parts per billion (ppb) to 1000 ppb (R2 = 0.996), as well as detection limits of 1.06 ppb for Cd2+ and 0.72 ppb for Pb2+ were obtained at optimized experimental conditions and parameters. The sensor was successfully utilized for the quantification of Cd2+ and Pb2+ in herbal food supplement samples with good agreement to the results obtained by atomic absorption spectroscopy. Thus, the BiNP/MWCNT/Nafion modified graphite electrode is a cost-effective and environment-friendly sensor for monitoring heavy metal contamination.


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