Dye-sensitized solar cells (DSCs) offer the possibilities to design solar cells with a large flexibility in shape, color, and transparency. DSC research groups have been established around the worl ...

/pdf/dye-sensitized-solar-cells-50b0w2bhsr.pdf

Dye-Sensitized Solar Cells

Department of Materials Science, University of Patras, 26504 Rio Patras, Greece, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vass. Constantinou Avenue, 116 35 Athens, Greece, Institut de Biologie Moleculaire et Cellulaire, UPR9021 CNRS, Immunologie et Chimie Therapeutiques, 67084 Strasbourg, France, and Dipartimento di Scienze Farmaceutiche, Universita di Trieste, Piazzale Europa 1, 34127 Trieste, Italy

Chemistry of Carbon Nanotubes

Review of the proton exchange membranes for fuel cell applications

Recent Trends in Macro-, Micro-, and Nanomaterial-Based Tools and Strategies for Heavy-Metal Detection Gemma Aragay, Josefina Pons, and Arben Merkoc-i* Nanobioelectronics & Biosensors Group, Institut Catal a de Nanotecnologia (CIN2, ICN-CSIC), 08193, Bellaterra, Barcelona, Spain Departament of Chemistry, Universitat Aut onoma de Barcelona, 08193, Bellaterra, Barcelona, Spain ICREA, Barcelona, Spain

Recent trends in macro-, micro-, and nanomaterial-based tools and strategies for heavy-metal detection.

Oxygen and hydrogen evolution reactions on Ru, RuO2, Ir, and IrO2 thin film electrodes in acidic and alkaline electrolytes: A comparative study on activity and stability

In this study, we present a copper film electrode (CuFE) for sensitive voltammetric detection of nitrophenols. The detection scheme comprised an electrochemical oxidative activation of a glassy carbon supporting electrode, an in situ formation of CuFE, and a measurement step. All three steps were performed simultaneously in a single cathodic voltammetric scan. Several critical parameters influencing the operation of CuFE were examined and optimized, such as the concentration of copper ions, pH, potential scan, activation time, etc. The CuFE showed excellent electroanalytical performance for the detection of selected mono-, di-, and trinitrophenols with good sensitivity in the low μg L−1 concentration range and favorable repeatability. The practical applicability of this sensor was successfully demonstrated by measuring 2,4-dinitrophenol, as a test analyte, in a real seawater sample.

Copper film electrode for sensitive detection of nitrophenols

Le pH est l'un des plus importants indicateurs pour deceler la longevite du papier Comme les methodes de mesure habituellement utilisees ne sont pas applicables a du papier a valeur historique, on a mis au point un nouveau type d'electrode Cet electrode est a base de carbone recouvert d'un film lisse de polyaniline et comprend une electrode de reference en argent/chlorite d'argent equipee d'un crochet permettant une mesure confortable de substances similaires au papier Il est possible de proceder a trois types d'echantillonage differents : ○ echantillons d'un diametre inferieur a 1 mm, ○ pas de prelevement special d'echantillons, mais mesure sur l'original humecte avec 1-2 μL, ○ mesure sur mini-echantillons de l'original a l'echelle de 5-10 μL On a etabli une correlation satisfaisante entre les resultats des trois procedes et une premiere extraction a froid Avec ces methodes, il est aussi aise de determiner le pH d'echantillons d'encre ferro-gallique On peut maintenir le degre de degradation causee lors du prelevement de fibres a la surface externe d'un objet a une quantite negligeable ou acceptable pour des objets precieux sur le plan artistique et historique C'est pour cette raison et aussi pour la simplicite de l'utilisation que cette nouvelle electrode est recommandee pour un usage de routine

A new electrode for micro-determination of paper pH

Abstarct A new type of bismuth electrode (BiImE) for anodic stripping voltammetric detection of trace Pb(II), which is based on a bismuth imidazolate (BiIm) sensing coating, is presented. A simple preparation protocol was adopted via drop-casting a rapidly drying methanol suspension of amorphous BiIm, serving as a source of bismuth ions, onto a supporting glassy carbon electrode. The BiIm sensing material was characterized and several key parameters influencing the preparation and performance of BiImE were investigated. The BiImE revealed good linear response in the two examined concentration ranges of 10–100 μg L−1 and 1–10 μg L−1 with r2 of 0.998 and 0.995, respectively, a low limit of detection (3σ) of 0.1 μg L−1 Pb(II) associated with 240 s accumulation, and a favorable repeatability with RSD of 3.8%. Even after scanning the potential toward more positive values than the re-oxidation potential of bismuth, the BiImE could be reused several times without any significant loss of performance, hence making it superior compared to its ex situ prepared counterparts while exhibiting advantages of the in situ prepared analogues. The applicability of BiImE was demonstrated through measuring Pb(II) in a real tap water sample. Preliminary experiments also proved its suitability for simultaneous measurement of trace Pb(II) and Cd(II).

A novel bismuth imidazolate-based sensor for detection of trace lead(II)

Initial studies with antimony-modified carbon paste electrodes are presented focused on their performance in anodic stripping voltammetry. The investigations performed have comprised the first experiments with antimony film-plated and antimony powder-dispersed carbon paste electrodes (SbF-CPE and Sb-CPE, respectively), as well as the corresponding bismuth-based electrodes in selected measurements carried out in parallel. The respective experiments have dealt with the characterisation of electrochemical behaviour of antimony, the effect ofpH, and the electrode substrate used. When using diluted solutions of HCl as the supporting electrolyte of choice together with Pb 2+ + Cd 2+ as model ions, the basic electroanalytical performance of both SbF-CPE and Sb-CPE in the square-wave anodic stripping voltammetric mode is outlined and some specifics found discussed with respect to possible applications in practical analysis.

Samo B. Hočevar

Papers

Copper film electrode for sensitive detection of nitrophenols

A new electrode for micro-determination of paper pH

A novel bismuth imidazolate-based sensor for detection of trace lead(II)

Antimony-modified carbon paste electrodes : initial studies and prospects

Impact of air pollution on outdoor cultural heritage objects and decoding the role of particulate matter: a critical review