scholarly journals Sensitive Electrochemical Detection of Glucose at Glucose Oxidase-Cobalt Phthalocyanine-Modified Boron-Doped Diamond Electrode

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Takeshi Kondo ◽  
Masaru Horitani ◽  
Makoto Yuasa
Keyword(s):  
Thin Film ◽  
Glucose Oxidase ◽  
Electrochemical Detection ◽  
Glucose Oxidation ◽  
Microwave Plasma ◽  
Cobalt Phthalocyanine ◽  
Electron Mediator ◽  
Boron Doped Diamond ◽  
Bdd Electrode ◽  
Boron Doped

Electrochemical detection of glucose was achieved at a glucose oxidase (GOx)-cobalt phthalocyanine (CoPc)-modified boron-doped diamond (BDD) electrode without any additional electron mediator in the electrolyte solution. The surface of the hydrogen-terminated BDD thin film prepared by microwave plasma-assisted CVD was modified with 4-vinylpyridine (4VP) via photochemical modification. The 4VP-BDD was then immersed in a CoPc solution to obtain CoPc-BDD. A poly(p-phenylenediamine) (PPD) thin film containing GOx was coated on the CoPc-BDD electrode surface via electropolymerization. At the GOx/PPD-CoPc-BDD electrode, anodic current for glucose oxidation was observed with a sigmoidal voltammetric curve, indicating successful electron mediation of H2O2generated as the result of glucose oxidation at GOx. The signal-to-background ratio for voltammetric current of glucose detection was larger at the GOx/PPD-CoPc-BDD electrode than at the GOx/PPD-modified platinum electrode due to the smaller background current of the modified BDD electrode.

scholarly journals Copper-Modified Boron-Doped Diamond (Cu/Bdd) Electrode for the Electrochemical Detection of Paclitaxel and Oxaliplatin in Aqueous Solutions

2020 ◽  
Vol 70 (12) ◽  
pp. 4605-4610
Keyword(s):  
Electrochemical Detection ◽  
Supporting Electrolyte ◽  
Boron Doped Diamond ◽  
Easy Method ◽  
Potential Value ◽  
Bdd Electrode ◽  
Diamond Electrode ◽  
Boron Doped ◽  
Boron Doped Diamond Electrode ◽  
Electrocatalytic Effect

The aim of this study was to obtain a simple and fast modified electrode for the detection of paclitaxel (PCX) and oxaliplatin (OXA) in aqueous solution. PCX and OXA are some of the most used cytostatic drugs suitable to treat various types of cancer, e.g., ovarian, breast, lung, cervical, pancreatic, Kaposi’s sarcoma. The development of an easy method for its determination is required for both the dosage in cancer therapy and due its potential presence in environment and especially, in water samples. Boron doped diamond (BDD) electrode was electrochemically modified with copper (Cu) by chronoamperometry (CA) operated under optimized conditions of -0.75 V/SCE potential level for 120 minutes. Copper-modified boron-doped diamond (Cu/BDD) exhibited the electrocatalytic effect towards the paclitaxel and oxaliplatin oxidation, allowing their detection in 0.1 M NaOH supporting electrolyte. The limiting anodic current was noticed at the potential value of +0.75 V/SCE that increased linearly with PCX concentration, and at the potential value of + 0.6V/SCE for the oxaliplatin. Some mechanical aspects related to the PCX oxidation at Cu/BDD electrode in 0.1 M NaOH supporting electrolyte were determined using cyclic voltammetry (CV) recorded at various scan rates. CV was based on compounds detection and achieved the sensitivity of 0.65 μA/µM for oxaliplatin and respective, 5.47 μA/µM for paclitaxel. Keywords: copper, electrochemical detection, modified boron-doped diamond electrode paclitaxel, oxaliplatin

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

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.

High-speed synthesis of heavily boron-doped diamond films by in-liquid microwave plasma CVD

2019 ◽  
Vol 92 ◽  
pp. 41-46 ◽  
Author(s):  
Yohei Harada ◽  
Ryota Hishinuma ◽  
Nicolae Spătaru ◽  
Yusei Sakurai ◽  
Kazuya Miyasaka ◽  
...  
Keyword(s):  
High Speed ◽  
Microwave Plasma ◽  
Diamond Films ◽  
Plasma Cvd ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Microwave Plasma Cvd
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