Publications (241)
ARTICLE
Préparation et étude de la phtalocyanine d’or
Bertrand Ouemega, Mabinty Bayo-Bangoura, Karifa Bayo.
Nous avons préparé par la voie humide, à partir du phtalodinitrile et de l’acide
tétrachloroaurique trihydraté, la phtalocyanine d’or (AuPc). Le produit a été caractérisé par
spectrométries de masse, vibrationnelle et électronique.
Métallophtalocyanine ; Or ; UV-visible ; Infrarouge.
ARTICLE
Solvent induced aggregation of protoporphyrin and octacarboxylphthalocyanine of zinc deposited on gold surface.
Virginie Gadenne, Mabinty Bayo-Bangoura, Louis Porte, Lionel Patrone.
In this paper, we studied the influence of solvent on the morphology of zinc protoporphyrin and zinc
octacarboxylphthalocyanine films transferred onto gold surface by dipping. In these films, carboxylic acid
groups borne in periphery of macrocycles allow anchoring to gold via ionic interaction. First, we followed
by UV–Visible absorption sp(...)
Zinc protoporphyrin Zinc phthalocyanine Solvent Aggregation Self-assembled monolayer Gold surface
ARTICLE
Antipassivating electrochemical process of glassy carbon electrode (GCE) dedicated to the oxidation of nitrophenol compounds
M. Pontié, G. Thouand, F. De Nardi, I. Tapsoba, S. Lherbette
We report for the first time a novel electrochemical treatment applied to a glassy carbon electrode (GCE) during p‐nitrophenol (PNP) oxidation and dedicated to the limitation of electrode passivation by nitrophenol compounds oxidation. We propose an electrochemical process of direct phenol oxidation by starting the electrolysis at a very low p(...)
Mots clés non renseignés
ARTICLE
Mabinty Bayo-Bangoura, Karifa Bayo, Mireille Mossoyan-Deneux. Synthèse de la chlorosousphtalocyanine de bore à partir de l’acide 1,4-diboronique benzène
Mabinty Bayo-Bangoura , Karifa Bayo, Mireille Mossoyan-Deneux
Nous avons synthe´ tise´ SubPcBCl a` partir de l’acide 1,4-diboronique benze`ne avec un
rendement de 45 %. Les analyses spectrome´ triques IR, UV-visible et RMN du proton sont
conformes aux donne´es de la litte´ rature.
Chlorosousphtalocyanine Bore Acide 1, Acide 1
ARTICLE
Direct Electroanalysis of p‐Nitrophenol (PNP) in Estuarine and Surface Waters by a High Sensitive Type C/p‐NiTSPc Coating Carbon Fiber Microelectrode (CFME)
M. Pontié, L. Sikpo, G. Thouand, R. Lahan, I. Tapsoba, R. Mallet, T. Feng
We report for the first time on the elaboration of a remarkable sensitivity type C/p‐NiTSPc carbon fiber microelectrode (CFME) for p‐nitrophenol (PNP) pollutant. We observed the best performances using square wave voltammetry (SWV) technique in the place of differential pulse voltammetry (DPV). Also the combination of p‐NiTSPc optimized cycles(...)
Mots clés non renseignés
ARTICLE
Comparative study of the hydrophobicity of BEA, HZSM-5 and HY zeolites determined by competitive adsorption
Arsène H. Yonli, Isabelle Gener, Samuel Mignard
A hydrophobicity study was realized for a series of siliceous and steamed BEA, HZSM-5 and HY zeolites. The hydrophobicity was assessed according to the Weitkamp method by performing water and toluene competitive adsorption experiments. The Weitkamp hydrophobicity indexes (HI) were determined for each sample. The BEA samples were the most hydro(...)
Mots clés non renseignés
ARTICLE
Tailoring the Hydrophobic Character of Mesoporous Silica by Silylation for VOC Removal
Isabelle Batonneau-Gener, Arsène Yonli, Adeline Trouvé, Samuel Mignard, Matteo Guidotti, Maila Sgobba
MCM-41 and non-ordered mesoporous silica were modified using hexamethyl-disilazane (HMDS). The hydrophobic and hydrophilic properties of grafted materials were studied and compared to a purely all silica BEA zeolite by using competitive and noncompetitive water toluene adsorption. A linear correlation between the silylation degree and the hydr(...)
Mots clés non renseignés
ARTICLE
Sensitive and Selective Electrochemical Analysis of Methyl‐parathion (MPT) and 4‐Nitrophenol (PNP) by a New Type p‐NiTSPc/p‐PPD Coated Carbon Fiber Micro...
Issa Tapsoba, S. Bourhis, T. Feng, M. Pontié
A novel modified carbon fiber microelectrode (CFME) was obtained by combination of tetrasulfonated nickel phtalocyanine (p‐NiTSPc) electroformed film associated to para‐phenylenediamine (p‐PPD) electropolymerized outer‐coating. The modified CFMEs where denoted C/p‐NiTSPc and C/p‐NiTSPc/p‐PPD, respectively. These electrodes are dedicated to the(...)
Mots clés non renseignés
ARTICLE
Les phénomènes de nitration des eaux souterraines dans la région de Tilabéry (Niger)
Marou Gourouza , Garba Zibo , Karifa Bayo
Résumé : Des échantillons d’eaux de consommation provenant de trois cent points d’eau
souterraine repartis sur toute la région de Tillabéry (Niger) ont été analysés. Les résultats
révèlent qu’environ 2/3 de ces points d’eaux connaissent un début de pollution au nitrate ;
10% sont impropres à la consommation humaine avec des teneurs supérieu(...)
Mots clés : eau, pollution, nitrate, potassium
ARTICLE
Comportement à la corrosion des alliages d’aluminium recyclés pour la confection de marmites
Tambi Ramdé∗ , Lucien Bonou, Boubié Guel, Jean Boukari Legma
La composition chimique et la microstructure d’alliages d’aluminium recyclés pour la fabrication de marmites ont été déterminées par méthode spectrométrique d’émission par ICP et la diffraction de rayons X (DRX). Le comportement à la corrosion aqueuse de ces alliages a été étudié dans une solution de Na2SO4, 0,5 M par le suivi de l’évolution d(...)
alliages d’aluminium recyclés, corrosion, polarisation potentiodynamique
ARTICLE
Influence of steaming and acid-leaching treatments on the hydrophobicity of HBEA zeolite determined under static conditions
Isabelle Batonneau-gener, Arsène Yonli , Solange Hazael-pascal, João Pedro Marques, José Madeira Lopes, Michel Guisnet, Fernando Ramôa Ribeiro, Samuel Mignard
A series of HBEA dealuminated samples was prepared by treatment with HCl or steaming of a parent sample. Samples were characterized by XRD, elemental analysis, nitrogen adsorption and pyridine adsorption–desorption followed by IR spectroscopy. The hydrophobicity coefficient, determined by separated static adsorption of water and toluene was us(...)
Mots clés non renseignés
ARTICLE
ELECTRODEPOSITION OF CADMIUM ON N-TYPE SILICON SINGLE CRYSTALS OF DIFFERENT SURFACE ORIENTATIONS
BOUBIÉ GUEL
The mechanisms related to the initial stages of the nucleation and growth mechanism of cadmium on (100) and (111) ntype silicon have been studied as a function of different potential steps. Within appropriate potential ranges the initial deposition kinetics corresponds to a model including progressive nucleation and diffusion controlled cluste(...)
Electrodeposition; n-Si(111); n-Si(100); Nucleation and growth mechanism.
ARTICLE
CADMIUM ELECTRODEPOSITION FROM AN AQUEOUS 0.1 M CdSO4 SOLUTION PART 1: ELECTROCHEMICAL AND IN SITU AFM STUDIES IN THE CASE OF n-Si(100)
Boubié GUEL
Electrochemical and in situ AFM studies of cadmium electrodeposition from an aqueous 0.1 M CdSO4 solution have been carried out in the case of (100) n-type silicon single crystal. The mechanisms related to the initial stages of the nucleation and growth mechanism of cadmium have been studied as a function of different potential steps. Within(...)
electrodeposition; n-Si(100); nucleation and growth, mechanism; anodic stripping curves.
ARTICLE
Influence d’additifs sur le mécanisme de l’électrodéposition du cuivre en milieu acide : étude en courant alternatif.
Lucien Bonou, Marielle Eyraud, Souleymane Kologo, Boubié Guel
Les travaux présentés dans cet article ont été faits
en utilisant des méthodes électrochimiques en courant alternatif. L’effet du PEG et des ions chlorures sur
l’électrodéposition du cuivre a donc été étudié par la spectrométrie d’impédance électrochimique (SIE) couplé
avec une étude ellipsométrique au potentiel à courant nul.
Les solution(...)
additifs PEG+Cl-, électrodéposition du cuivre, spectroscopie d'impédance électrochimique
ARTICLE
Electrochemical detection in a microfluidic device of oxidative stress generated by macrophage cells
Christian Amatore, Stéphane Arbault, Yong Chen, Cécile Crozatier and Issa Tapsoba
The release of reactive oxygen species (ROS) or reactive nitrogen species (RNS), ie, the initial phase of oxidative stress, by macrophage cells has been studied by electrochemistry within a microfluidic device. Macrophages were first cultured into a detection chamber containing the three electrodes system and were subsequently stimulated by th(...)
Mots clés non renseignés