scholarly journals Study of the Electrochemical Deposition of Cu/Sn Alloy Nanoparticles on Boron Doped Diamond Films for Electrocatalytic Nitrate Reduction

2013 ◽  
Vol 1511 ◽  
Author(s):  
Jorge T. Matsushima ◽  
Andrea B. Couto ◽  
Neidenei G. Ferreira ◽  
Mauricio R. Baldan
Keyword(s):  
Electrochemical Deposition ◽  
Sem Analysis ◽  
Homogeneous Distribution ◽  
Alloy Nanoparticles ◽  
Electrocatalytic Reduction ◽  
Boron Doped Diamond ◽  
Buffer Solution ◽  
Bdd Electrode ◽  
Boron Doped ◽  
Dissolution Peak

ABSTRACTThis paper presents the study of the electrochemical deposition of Cu/Sn alloy nanoparticles on Boron Doped Diamond (BDD) films in order to improve their electrocatalytic activity and selectivity for application in nitrate electrochemical reduction. Cyclic voltammetry measurements evidenced the formation of Cu/Sn alloy electrodeposited on BDD electrode. The electrodeposited Cu/Sn can be better visualized by analyzing the dissolution process. By studying the dissolution peak separately, the dissolution peak of the Sn was obtained at a more positive potential, when compared with the dissolution peak of Cu. From the scanning electronic microscopy (SEM) analysis, the homogeneous distribution of the Cu/Sn alloys particles on BDD surface with grain size in nanometric scale was verified. From X-ray diffraction analysis, two Cu/Sn alloy phases (Cu41Sn11 and Cu10Sn3) were identified for the electrodeposits obtained at -0.5V and charge of 0.26 C. The electrocatalytic reduction of nitrate in 0.1 M Britton-Robinson (BR) buffer solution with pH 9 was analyzed. The BDD electrode modified with Cu/Sn alloy nanoparticles proved to potentiate the electrocatalytic reduction of nitrate.

scholarly journals Investigation of a Cu/Pd Bimetallic System Electrodeposited on Boron-Doped Diamond Films for Application in Electrocatalytic Reduction of Nitrate

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Jorge T. Matsushima ◽  
Valéria C. Fernandes ◽  
Andrea B. Couto ◽  
Maurício R. Baldan ◽  
Neidenêi G. Ferreira
Keyword(s):  
Nitrate Reduction ◽  
Morphological Analysis ◽  
Homogeneous Distribution ◽  
Electrocatalytic Reduction ◽  
Boron Doped Diamond ◽  
Buffer Solution ◽  
Solution Ph ◽  
Cu Content ◽  
Boron Doped ◽  
Bimetallic System

The Cu/Pd bimetallic system electrodeposited on boron-doped diamond (BDD) films for application, as electrode material in the electrochemical reduction of nitrate was studied. The electrochemical behavior of Cu, Pd, and Cu/Pd bimetallic system was evaluated by cyclic voltammetry. From these results, the formation of the Cu/Pd composite was verified. In addition, Cu with different phases and a Cu/Pd phase in the composite were obtained. Morphological analysis by scanning electron microscopy (SEM) revealed a homogeneous distribution of Cu/Pd bimetallic particles with intermediary dimensions compared to those observed in Cu or Pd electrodeposits separately. These composites were tested as electrocatalysts for nitrate reduction in Britton-Robinson buffer solution (pH 9). Electrochemical measurements showed that composites with higher Cu content displayed the best electrocatalytic activity for nitrate reduction, and the Cu/Pd phase in the bimetallic system served to improve the Cu adherence on BDD electrode.

DICLOFENAC REMOVAL FROM AQUEOUS SOLUTIONS BY ELECTROOXIDATION AT BORON-DOPED DIAMOND (BDD) ELECTRODE

2015 ◽  
Vol 14 (6) ◽  
pp. 1339-1345
Author(s):  
Monica Ihos ◽  
Florica Manea ◽  
Maria Jitaru ◽  
Corneliu Bogatu ◽  
Rodica Pode
Keyword(s):  
Aqueous Solutions ◽  
Boron Doped Diamond ◽  
Bdd Electrode ◽  
Boron Doped

Rapid Electroanalytical Method for Determination of Nebivolol at a Boron-Doped Diamond Electrode

2015 ◽  
Vol 98 (6) ◽  
pp. 1535-1541 ◽  
Author(s):  
Biljana Nigović ◽  
Ana Mornar ◽  
Mario Završki
Keyword(s):  
High Speed ◽  
Comparative Method ◽  
Potential Range ◽  
Boron Doped Diamond ◽  
Buffer Solution ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode ◽  
Electroanalytical Method

Abstract A boron-doped diamond electrode provided a sensitive and cost-effective sensing platform for detection and quantitative determination of novel beta(1)-adrenergic receptor antagonist nebivolol. The net square-wave voltammetric response at 1.31 V related to the oxidation of nebivolol was obtained in Britton-Robinson buffer solution at pH 8. It increased linearly with the drug concentration in the range of 2.5 × 10–7 to 1.5 × 10–5 M. The LOD attained was 3.2 × 10–8 M. The practical analytical approach was illustrated by high speed quantification of nebivolol in a commercial pharmaceutical formulation. The RP-HPLC was selected as a comparative method for evaluating the proposed electroanalytical method. The newly developed method at the unmodified electrode surface was faster and simpler in comparison with HPLC (the retention time was 17.6 min), and only 6 s was necessary for direct voltammetric measurement in the potential range from 0.5 to 1.7 V with a 2 mV potential step and pulse frequency of 100 Hz.

scholarly journals Copper photoelectrodeposition onto boron doped diamond electrodes at different doping level to enhance nitrate electroreduction.

2012 ◽  
Vol 1395 ◽  
Author(s):  
A. B. Couto ◽  
M. R. Baldan ◽  
N. G. Ferreira
Keyword(s):  
Nitrate Reduction ◽  
Doping Level ◽  
Diamond Films ◽  
Diamond Electrodes ◽  
Boron Doped Diamond ◽  
Buffer Solution ◽  
Solution Ph ◽  
High Doping Level ◽  
Copper Particles ◽  
Boron Doped

ABSTRACTPhotoelectrodeposition of copper on boron-doped diamond films (BDD) was investigated. In this work, two different doped films were analyzed. Copper particles were deposited in the potentiostat mode and under UV irradiation. The BDD film as-grown and the BDD film modifed with Cu (Cu/BDD) on the surface were characterized by Raman Spectroscopy and Scanning Electron Microscopy (SEM) respectivily. These electrodes were tested as electrocatalysts for nitrate reduction in Britton-Robinson buffer solution (pH=3). Electrochemical measurements showed that the electrode with high doping level displayed the best electrocatalytic activity.

Voltammetric determination of antifungal agents in pharmaceuticals and cosmetics using boron-doped diamond electrodes

2014 ◽  
Vol 6 (19) ◽  
pp. 7912-7922 ◽  
Author(s):  
Katarzyna Mielech-Łukasiewicz ◽  
Katarzyna Rogińska
Keyword(s):  
Antifungal Agents ◽  
Voltammetric Determination ◽  
Diamond Electrodes ◽  
Boron Doped Diamond ◽  
Ciclopirox Olamine ◽  
Bdd Electrode ◽  
Boron Doped

This paper presents attractive methods for the determination of ketoconazole and ciclopirox olamine. The recommended procedures are based on oxidation of the said compounds on the BDD electrode. The properties of this electrode and the usage of the SWV technique facilitated the development of sensitive and accuracy procedures intended to determine the selected antifungal agents.

scholarly journals Sensitive Voltammetric Detection of Chloroquine Drug by Applying a Boron-Doped Diamond Electrode

2020 ◽  
Vol 6 (4) ◽  
pp. 75
Author(s):  
Geiser Gabriel Oliveira ◽  
Déborah Christine Azzi ◽  
Tiago Almeida Silva ◽  
Paulo Roberto de Oliveira ◽  
Orlando Fatibello-Filho ◽  
...  
Keyword(s):  
Square Wave Voltammetry ◽  
Limit Of Detection ◽  
Boron Doped Diamond ◽  
Bdd Electrode ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Wave Voltammetry ◽  
Boron Doped Diamond Electrode ◽  
Analytical Curve ◽  
Voltammetric Detection

In this research, a boron-doped diamond (BDD) electrode has been explored to detect the chloroquine drug. The electrochemical performance of BDD electrode towards the irreversible anodic response of chloroquine was investigated by subjecting this electrode to the cathodic (−0.5 A cm−2 by 180 s, generating a predominantly hydrogen-terminated surface) and anodic (+0.5 A cm−2 by 30 s, oxygen-terminated surface) pretreatments. The cathodically pretreated BDD electrode ensured a better-defined anodic peak and higher current intensity. Thus, by applying the cathodically pretreated BDD electrode and square-wave voltammetry (SWV), the analytical curve was linear from 0.01 to 0.25 µmol L−1 (correlation coefficient of 0.994), with sensitivity and limit of detection of 12.2 µA L µmol−1 and 2.0 nmol−1, respectively. This nanomolar limit of detection is the lowest recorded so far with modified and unmodified electrodes.

scholarly journals Anodic Stripping Voltammetry of Se4+on Gold-Modified Boron-Doped Diamond Electrodes

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Stéphane Fierro ◽  
Takeshi Watanabe ◽  
Kazumi Akai ◽  
Mikito Yamanuki ◽  
Yasuaki Einaga
Keyword(s):  
Gold Nanoparticles ◽  
Anodic Stripping Voltammetry ◽  
Selenium Concentration ◽  
Stripping Voltammetry ◽  
Boron Doped Diamond ◽  
Bdd Electrode ◽  
Boron Doped ◽  
Calibration Curves ◽  
Anodic Stripping ◽  
Clear Peak

Electrochemical detection of Se4+has been performed by anodic stripping voltammetry on a boron-doped diamond (BDD) electrode modified with gold nanoparticles deposited through chronocoulometry. This method is based on the affinity between the gold nanoparticles and Se0, while the BDD electrode is presented as an ideal material for metal modification due to its unique properties. The resulting anodic stripping voltammograms exhibited a clear peak at 0.9 V versus AgCl related to Se4+, and highly accurate (r2=0.99) calibration curves could be obtained for a selenium concentration range between 10 and 100 μg/L. The influence of Se deposition time and other metals dissolved in solution (Cu, Cd, Pb, Cr, and B) has been investigated as well, and it was found that the Se4+calibration curves remained unaltered. For all the experiments performed, a detection limit around 10 μg/L was achieved. The high accuracy and reproducibility of the results as well as the excellent stability of the electrode material proves the excellent capabilities of this system for selenium detection.

Mineralization of bisphenol A (BPA) by anodic oxidation with boron-doped diamond (BDD) electrode

2008 ◽  
Vol 154 (1-3) ◽  
pp. 213-220 ◽  
Author(s):  
M. Murugananthan ◽  
S. Yoshihara ◽  
T. Rakuma ◽  
T. Shirakashi
Keyword(s):  
Bisphenol A ◽  
Anodic Oxidation ◽  
Boron Doped Diamond ◽  
Bdd Electrode ◽  
Boron Doped
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