Cover Picture

1 XIX Brazilian Symposium on Electrochemistry and Electroanalytical Chemistry (XIX-SIBEE)Roberto M. Torresi and Mauro Coelho dos Santos

Editorial

Contents

Vol. 25, No. 3, March, 2014

ISSN 0103-5053JBCSJournal of the Brazilian Chemical Society

The mission of the event is to promote the integration of different areas of knowledge in electrochemistry and electroanalytical chemistry and to induce the association of researchers enabling the development of multi and interdisciplinary work, leading to substantial contribution to the progress of science.

J. Braz. Chem. Soc.vi

Reviews393 A Review on the Degradation of Organic Pollutants in Waters

by UV Photoelectro-Fenton and Solar Photoelectro-FentonEnric Brillas

Graphical AbstractThis paper presents a review on the UV photoelectro-Fenton and solar

photoelectro-Fenton methods in which organic pollutants are mineralized under the synergistic action of •OH formed at the anode from water

oxidation and in the bulk from Fenton’s reaction between added Fe2+ and cathodically generated H2O2, as well as UV radiation provided by an

artificial lamp and sunlight, respectively

Articles442 Oscillatory Instabilities in the Electrooxidation of Borohydride

on PlatinumEduardo G. Machado and Hamilton Varela

Graphical AbstractThis figure displays the main findings of the work, showing in a pictorial

way that the electrooxidation of borohydride, under the appropriate conditions, can present complex behavior

418 Nanoparticle Mediated Electron Transfer Across Organic Layers: From Current Understanding to ApplicationsJ. Justin Gooding, Muhammad Tanzirul Alam, Abbas Barfidokht and Lachlan Carter

Graphical AbstractNanoparticles mediated electron transfer through an otherwise insulating

surface

427 Electrocatalysis by Hydrogenases: Lessons for Building Bio-Inspired DevicesIan J. McPherson and Kylie A. Vincent

Graphical Abstract‘Plugging in’ redox enzymes to electrically conductive surfaces allows the assembly of devices ranging from fuel cells to photochemical systems for

fuel production

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478 Simultaneous Determination of Paracetamol and Ibuprofen in Pharmaceutical Samples by Differential Pulse Voltammetry Using a Boron-Doped Diamond ElectrodeAmanda B. Lima, Lívia M. F. C. Torres, Carlos F. R. C. Guimarães, Rodrigo M. Verly, Leonardo M. da Silva, Álvaro D. Carvalho Júnior and Wallans T. P. dos Santos

Graphical AbstractWe present in this work a simple, fast and low-cost methodology for simultaneous determination of paracetamol and ibuprofen in

pharmaceutical samples using a high stable electrode (boron-doped diamond) by differential pulse voltammetry (DPV)

469 Electrochemical Oxidation, Adsorption and Quantification of 1,2-Benzopyrone Employing a Glassy Carbon ElectrodeLuiz Fernando M. de Azevedo, Marcello G. Trevisan, Jerusa S. Garcia and Alzira M. S. Lucho

Graphical AbstractThe electrooxidation and quantification of 1,2-benzopyrone in guaco

samples was studied. An optimization chemometric and electrochemical impedance methodology was used to evaluate the adsorption process on

an electrode surface

460 Electrochemical Behavior of Iron and Magnesium in Ionic LiquidsLucas Lodovico, Vitor L. Martins, Tânia M. Benedetti and Roberto M. Torresi

Graphical AbstractIn this study, some issues concerning the electrodeposition of Mg2+ and

Fe2+ in ionic liquids (ILs) are discussed, like: passivation of the electrode caused by the participation of the ILs ions in the process and the effect

of the presence of small amounts of water in the systems

453 Polymer Brush Modified Electrode with Switchable Selectivity Triggered by pH Changes Enhanced by Gold NanoparticlesJuliane R. Sempionatto, Lucas C. Recco and Valber A. Pedrosa

Graphical AbstractA switchable sensor was built up with smart material based on polymer

brush and gold nanoparticles. The modified electrode functionalized with polyacrylic acid (PAA) tethered to indium tin oxide (ITO) and covered

with gold nanoparticle (ITO/PAA/Au) demonstrated switchable interfacial properties discriminating different pH measurements by different

techniques

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448 Electrochemical Oxidation of Chlorhexidine and its Amperometric Determination by Flow-Injection AnalysisAna Paula de Lima, Jessica S. Stefano, Rodrigo H. O. Montes, Rafael R. Cunha, Luiz A. J. Silva, Eduardo M. Richter and Rodrigo A. A. Muñoz

Graphical AbstractThe electrochemical oxidation of chlorhexidine is studied for the first

time and its amperometric determination using a flow-injection analysis system is demonstrated. The method was applied for the analysis mouth

rinses and skin disinfectants and compared with HPLC

J. Braz. Chem. Soc.viii

517 Determination of Quercetin in a Pharmaceutical Sample by Square-Wave Voltammetry Using a Poly(vinylpyrrolidone)-Modified Carbon-Paste ElectrodeJamille V. Piovesan and Almir Spinelli

Graphical AbstractA poly(vinylpyrrolidone)-modified carbon-paste electrode was

evaluated for determination of quercetin. The sensor showed excellent performance in the analysis of a pharmaceutical sample. The sensor also

worked for other flavonoids

509 Performance of a Direct Glycerol Fuel Cell using KOH Doped Polybenzimidazole as ElectrolyteAna P. Nascimento and José J. Linares

Graphical AbstractAlkaline-based direct glycerol fuel cells act oxidizing glycerol and producing electricity at the same time. In the anode, the glycerol oxidation products are produced along with water. In the cathode,

oxygen is reduced, generating OH– ions that travels across the KOH-impregnated polybenzimidazole membrane. The electrons flow through

the external circuit supplying electricity to the external elements

502 Carbon Nanotubes Modified with SnO2 Rods for Levofloxacin Detection Vivian Cesarino, Ivana Cesarino, Fernando C. Moraes, Sergio A. S. Machado and Lucia H. Mascaro

Graphical AbstractA new sensor based on multi-walled carbon nanotubes modified with

SnO2 rods was evaluated for the electrochemical determination of levofloxacin. The proposed material was shown to be a promising

alternative for electrochemical sensing

492 Electrochemical Degradation of Dimethyl Phthalate Ester on a DSA® ElectrodeFernanda L. Souza, José M. Aquino, Douglas W. Miwa, Manuel A. Rodrigo and Artur J. Motheo

Graphical AbstractElectric energy consumption for electrolysis required to attain 40% of

DMP concentration and TOC removals is ca. 23 kW h m-3

484 Flow-Injection Analysis with Multiple-Pulse Amperometry for Simultaneous Determination of Paracetamol and Naproxen Using a Homemade Flow Cell for Screen-Printed ElectrodesJessica S. Stefano, Rodrigo H. O. Montes, Eduardo M. Richter and Rodrigo A. A. Muñoz

Graphical AbstractThe simultaneous determination of paracetamol and naproxen using

multiple-pulse amperometric detection on a screen-printed electrode adapted in a homemade flow-injection analysis cell is described

ixVol. 25, No. 3, 2014

560 Hybrid Microbial-Photosynthetic Biofuel Cells for Simultaneous Bacterial Glycerol Biotransformation and Algal Carbon Dioxide CaptureCamilo Enrique La Rotta Hernández, Ady Luna Leite, Patricia Virginia Dantas, Sergio Peres Ramos, Maria de los Angeles Perez and Galba Maria de Campos Takaki

Graphical AbstractUpper figure: bicompartmented microbial fuel cell for glycerol

biotransformation using Pseudomonas aeruginosa bioanode and chemical redox pair cathode; and lower figure: hybrid photosynthetic fuel cell for

glycerol biotransformtion in bacterial anodes and CO2 co-sequestration using Chlorella vulgaris biocathode

550 A New Electrochemical Sensor Containing a Film of Chitosan-Supported Ruthenium: Detection and Quantification of Sildenafil Citrate and AcetaminophenFábio Godoy Delolo, Claudia Rodrigues, Monize Martins da Silva, Luis Rogério Dinelli, Felix Nicolai Delling, Julio Zukerman-Schpector and Alzir Azevedo Batista

Graphical AbstractThe chitosan-supported ruthenium compound (RuQT) was synthesized and

characterized. Its obtained film on the glass carbon electrode surface was applied as an electrochemical sensor for detection and quantification

of sildenafil citrate (Viagra®) and acetaminophen (Tylenol®) analytes

540 Melt sonoquenching: an Affective Process to Obtain New Hybrid Material and Achieve Enhanced Electrochromic Performances Based on V2O5/2,4,5-tris(1-methyl-4-pyridinium)-imidazolide Tetrafluoroborate NanofibersRenato S. de Oliveira, Juliana da S. Goulart, Fabio S. Miranda and Eduardo A. Ponzio

Graphical AbstractA new synthetic method to prepare hybrid nanomaterials based in melt

sonoquenching was developed. This procedure is easily applicable for production of hybrid nanomaterials. The new hybrid presents a good

electrochromic performance

532 On the Use of the Power-Law Model for Interpreting Constant-Phase-Element ParametersMark E. Orazem, Bernard Tribollet, Vincent Vivier, Douglas P. Riemer, Erick White and Annette Bunge

Graphical AbstractElectrochemical impedance spectroscopy: method shown to extract

meaningful physical properties from CPE parameters

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SI online

526 Optical Properties and Surface Morphology of ZnTe Thin films Prepared by Multiple Potential Steps Murilo F. Gromboni, Francisco W. S. Lucas and Lucia H. Mascaro

Graphical AbstractThis picture shows the morphology and photocurrent of ZnTe thin films

growth by multiple potentiostatic steps

J. Braz. Chem. Soc.x

602 Electrochemical Study of Simple Coumarin and its Determination in Aqueous Infusion of Mikania glomerataDaniela M. Miyano, Thays Lima, Fábio R. Simões, Mauro A. La-Scalea, Hueder P. M. Oliveira and Lucia Codognoto

Graphical AbstractCurrent components for the simple coumarin reduction by SWV at

pH 12.0 in 0.1 mol L-1 BR buffer

597 Morphological and Electrochemical Characteristics of Electrosynthesized PPy/CD CompositeRubênia S. Monte, Lloyd R. V. Kotzebue, Dalila L. Alexandre, Roselayne F. Furtado, Jorge A. C. Santos, Joana D. P. Dantas and Carlucio R. Alves

Graphical AbstractCardanol is a byproduct of processing cashew nuts of

Anacardium occidentale L. It was used in the electropolymerization process of conductive polypyrrole/cardanol composite

589 A Comparative Study Between Two Different Conventional Working Electrodes for Detection of ∆9-Tetrahydrocannabinol Using Square-Wave Voltammetry: a New Sensitive Method for Forensic AnalysisMarco A. Balbino, Izabel C. Eleotério, Laura S. de Oliveira, Matheus M. T. de Menezes, José Fernando de Andrade, Antônio José Ipólito and Marcelo F. de Oliveira

Graphical AbstractThe voltammetric analysis of ∆9-THC in marijuana seized samples.

A previous extraction of cannabinoids (1,2) and subsequent purification by thin layer chromatography (3) is essential for optimization of ∆9-THC

detection by SWV analysis (4,5)

579 Decoration of Ti/TiO2 Nanotubes with Pt Nanoparticles for Enhanced UV-Vis Light Absorption in Photoelectrocatalytic ProcessLucio C. Almeida and Maria V. B. Zanoni

Graphical AbstractPhotoelectrocatalytic oxidation of Acid Red 29 dye using Pt/TiO2NT

photoelectrodes. The degradation efficiency was enhanced remarkably when Pt nanoparticles were deposited, due to better use of irradiation

and minimization of charge recombination

572 Electrochemical Synthesis of the Copolymer Poly(2-methoxy-5-bromo-p-phenylenevinylene)/(2,5-dicyano-p-phenylenevinylene) (MB-PPV/DCN-PPV): Tuning PropertiesKarine C. C. W. S. Klider, Fábio S. Santos, Laura O. Péres, Karen Wohnrath and Jarem R. Garcia

Graphical AbstractThe electrical and structural characterization of the copolymer

cop‑MB-PPV/DCN-PPV indicated that it presents a D-A characteristic, and for this reason is a good candidate to be used as active layer in

photovoltaic devices