JBCS

This 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.

Nanoparticles mediated electron transfer through an otherwise insulating surface.

'Plugging in' redox enzymes to electrically conductive surfaces allows the assembly of devices ranging from fuel cells to photochemical systems for fuel production.

This 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.

The 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.

A 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.

In 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.

The 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.

We 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).

The 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.

Electric energy consumption for electrolysis required to attain 40% of DMP concentration and TOC removals is ca. 23 kW h m^-3.

A 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.

Alkaline-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.

A 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.

This picture shows the morphology and photocurrent of ZnTe thin films growth by multiple potentiostatic steps

Electrochemical impedance spectroscopy: method shown to extract meaningful physical properties from CPE parameters

A 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.

The 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.

Upper 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.

The electrical and structural characterization of the copolymer cop-MB-PPV/DCN-PPV indicated that itpresents a D-A characteristic, and for this reason is a good candidate to be used as active layer in photovoltaic devices.

Photoelectrocatalytic 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.

The 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).

Cardanol is a byproduct of processing cashew nuts of Anacardium occidentale L. It was used in the electropolymerization process of conductive polypyrrole/cardanol composite.

Current components for the simple coumarin reduction by SWV at pH 12.0 in 0.1 mol L^-1 BR buffer.