scholarly journals Functionalized Carbon Nanotubes for Chemical Sensing: Electrochemical Detection of Hydrogen Isotopes

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 968
Author(s):  
Stefan-Marian Iordache ◽  
Eusebiu Ilarian Ionete ◽  
Ana-Maria Iordache ◽  
Ioan Stamatin ◽  
Nicolae Catalin Zoita ◽  
...  
Keyword(s):  
Pd Nanoparticles ◽  
Carbon Electrode ◽  
Aqueous Samples ◽  
Hydrogen Atoms ◽  
Sensitive Material ◽  
Functionalized Carbon Nanotubes ◽  
Deuterium Concentration ◽  
Oxidation Curve ◽  
Micellization Process ◽  
Spectroscopy Studies

In this study, we propose a palladium-functionalized CNT composite working as a sensitive material to evaluate the deuterium concentration in aqueous samples. The sensitive material was prepared by the deposition of Pd nanoparticles onto MWCNT–OH by the micellization process. A modified electrode was prepared by drop casting 60 μL of Pd-decorated MWCNT suspension on a clean glassy carbon electrode surface. The sensing behavior was investigated in a series of deuterium-enriched solutions ranging from 25 to 10.000 ppm. We performed cyclic voltammetry and impedance spectroscopy studies on the samples. The process is quasi-reversible with the reduction curve more pronounced than the oxidation curve, which indicates a low tendency to desorption for the hydrogen atoms.

Electrocatalytic determination of hydrazine by a glassy carbon electrode modified with PEDOP/MWCNTs–Pd nanoparticles

2011 ◽  
Vol 153 (1) ◽  
pp. 246-251 ◽  
Author(s):  
Seul Ki Kim ◽  
Yu Na Jeong ◽  
Mohammad Shamsuddin Ahmed ◽  
Jung-Min You ◽  
Hyun Chul Choi ◽  
...  
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Pd Nanoparticles ◽  
Carbon Electrode ◽  
Electrocatalytic Determination

CO Adsorption on Pd Nanoparticles:  Density Functional and Vibrational Spectroscopy Studies

2003 ◽  
Vol 107 (1) ◽  
pp. 255-264 ◽  
Author(s):  
Ilya V. Yudanov ◽  
Riadh Sahnoun ◽  
Konstantin M. Neyman ◽  
Notker Rösch ◽  
Jens Hoffmann ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Density Functional ◽  
Co Adsorption ◽  
Pd Nanoparticles ◽  
Spectroscopy Studies

scholarly journals Differential pulse adsorptive stripping voltammetric determination of methotrexate using a functionalized carbon nanotubes-modified glassy carbon electrode

2013 ◽  
Vol 11 (11) ◽  
pp. 1837-1843 ◽  
Author(s):  
Geiser Oliveira ◽  
Bruno Janegitz ◽  
Valtencir Zucolotto ◽  
Orlando Fatibello-Filho
Keyword(s):  
Carbon Nanotubes ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
High Performance ◽  
Comparative Method ◽  
Differential Pulse ◽  
Carbon Electrode ◽  
Experimental Conditions ◽  
Functionalized Carbon Nanotubes

AbstractA glassy carbon electrode (GC) containing multiwalled functionalized carbon nanotubes (MWCNTs) immobilized within a dihexadecylhydrogenphosphate film (DHP) is proposed as a nanostructured platform for determination of methotrexate (MTX) concentration (a drug used in cancer treatment) using differential pulse adsorptive stripping voltammetry (DPAdSV). The voltammograms for a MTX solution using MWCNTs-DHP/GC electrode presented an oxidation peak potential at 0.98 V vs. Ag/AgCl (3.0 mol L−1 KCl) in a 0.1 mol L−1 sulphuric acid. The apparent heterogeneous electron transfer rate constant of 0.46 s−1 was calculated. The recovery area of 2.62×10−9 mol cm2 was also obtained. Under the optimal experimental conditions, the analytical curve was linear in the MTX concentration range from 5.0×10−8 to 5.0×10−6 mol L−1, with a detection limit of 3.3×10−8 mol L−1. The MWCNTs-DHP/GC electrode can be easily prepared and was applied for the determination of MTX in pharmaceutical formulations, with results similar to those obtained using a high-performance liquid chromatography comparative method.

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