Publications (191)
ARTICLE
Electrocatalytic activity carbon-supported metallophthalocyanine catalysts toward oxygen reduction reaction in alkaline solution
Seydou Hebié, Mabinty Bayo-Bangoura, Karifa Bayo, Karine Servat, Claudia Morais,Teko W. Napporn, K. Boniface Kokoh
Carbon-supported metallophthalocyanine catalysts,
composed of a transition central metal M (M = Co, Mn, Ni,
Fe) in the phthalocyanine ring, were synthesized in this work.
As cathodic reaction in a fuel cell, the oxygen reduction reaction
(ORR) was investigated in alkaline medium with linear
scanning voltammetry at the surface of these ele(...)
Metallophthalocyanines . Cyclic voltammetry . Oxygen reduction reaction (ORR) . Electrocatalytic activity . Alkaline medium
ARTICLE
Electrochemical behaviour of iron (II) at a Nafion-1,10-phenanthroline-modified carbon paste electrode : assessing the correlation between preconcentration potential, surface morphology and impedance measurements
Abdoulkadri Ayouba MAHAMANE, Boubié. GUEL, Paul-Louis FABRE
: The electrochemical behavior of a Nafion-1,10-phenanthroline-modified carbon paste electrode (CMCPE:
Chemically Modified Carbon Paste Electrode) immersed in a supporting electrolyte 0.1 mol.L-1 acetate buffer solution
(pH 4.5) containing iron(II) metal ion has been studied, using cyclic voltammetry, differential-pulse voltammetry and
impe(...)
Iron(II) metal ion; Nafion-1
ARTICLE
Caractérisations physico-chimiques des eaux souterraines de la localité de Yamtenga (Burkina Faso)
Abdoulkadri Mahamane AYOUBA, B. GUEL
Dans la localité de Yamtenga au Burkina Faso, les eaux souterraines constituent les ressources hydriques primordiales pour l’alimentation en eau de boisson de la population rurale et pour l’irrigation des terres agricoles. Ce travail visait à étudier la qualité physico-chimique des eaux de forages et de puits de cette localité. Pour y parvenir(...)
Yamtenga, eaux souterraines, analyses physico-chimiques
ARTICLE
Impact of sheet erosion mechanisms on organic carbon losses from crusted soils in the Sahel
S.B. Maïga-Yaleu, P. Chivenge, H. Yacouba, I. Guiguemde, H. Karambiri, O. Ribolzi, A. Bary, V. Chaplot
Soil surface crusting influences water infiltration and runoff but its impact on soil organic carbon (SOC) losses by sheet erosion is largely unknown. Because there are different mechanisms of sheet erosion, from raindrop detachment and transport by raindrops interacting with flow (RIFT), to detachment and transport by flow, that require a cer(...)
Erosion mechanism, Soil surface feature, Land degradation, Soil organic carbon, Nutrients
ARTICLE
Propriétés technologiques de carreaux céramiques à base d’argiles : influence d’un talc nature
Moustapha Sawadogo, Lamine Zerbo, Mohamed Seynou, Brahima Sorgho, Raguilnaba Ouedraogo
Local clay from Burkina Faso has been used as a basic
raw material in the formulation of ceramic tile with a natural talc (0 - 4%
wt) as a flux. The used sintering temperatures are between 950 and 1100 °C
with one hour as hold at heating rate of 5 °C·min-1. The different
technological properties (shrinkage, water absorption and mechani(...)
ceramic tiles, energy gain, low temperatures, raw clay, sintering
ARTICLE
Caractérisations physico-chimiques des ustensiles de cuisine (marmites artisanales) fabriqués au Burkina Faso.
Jacques Sawadogo1*, Moussa Bougouma1, Tambi Ramdé1,Guel Boubié1, Lucien Désiré Bonou1, Marie-Paule Delplancke Ogletree2, Jean Boukari Legma
Dans le cadre de la valorisation des matériaux d’origine artisanale du Burkina Faso, quelques échantillons d’ustensiles de cuisine (marmites artisanales) prélevés dans les différentes zones de la ville de Ouagadougou ont subi une série d’analyses chimiques et physico-chimiques. Les analyses à la fluorescence X (XRF) et à la Spectroscopie d’émi(...)
ustensiles de cuisine, Analyses, physico-chimiques, MEB
ARTICLE
Inhibition of the Cu65/Zn35 brass corrosion by natural extract of Camellia sinensis
Tambi Ramdé, Stefano Rossi, Caterina Zanella
In this work, the corrosion inhibition of brass was studied using natural plant extract, Camellia sinensis, in 0.1 M Na2SO4 solutions with pH 7 and pH 4. Electrochemical techniques (potentiodynamic polarization, electrochemical impedance spectroscopy) and scanning electron microscopy (SEM) were applied to study the brass corrosion behavior in(...)
Natural extract, Corrosion inhibition, Brass, Cultural artefacts conservation
ARTICLE
Étude d’une série de phtalocyanines de cobalt et de zinc par chronoampérométrie et chronocoulométrie
Seydou Ouedraogo, Mabinty Bayo-Bangoura, Bertrand Ouemega,Karifa Bayo, Boubié Guel
Nous avons étudié une série de complexes de la phtalocyanine (Pc) : CoPc, biCoPc, CoPcF8, F12biCoPc,
ZnPc, biZnPc, ZnPcF8 et F12biZnPc par chronoampérométrie et chronocoulométrie sur une électrode de carbone vitreux dans le DMSO. Cette étude confirme les résultats déjà en notre possession, à savoir que, dans les complexes
binucléaires, la dé(...)
cobalt, zinc, phtalocyanine, mononucléaire, binucléaire
ARTICLE
Ageing of clay and clay–tannin geomaterials for building
I. Keita a, B. Sorgho b, C. Dembele a, M. Plea a, L. Zerbo b, B. Guel b, R. Ouedraogo b, M. Gomina c, P. Blanchart d,
Clay geomaterials for building are clay sand mixture with controlled microstructural characteristics. The macroscopic strength mostly results from the binding property of clays and can be increased with the addition of various additives as tannins from plants. Such an improvement is due to the formation of chemical complexes tannin–clay–iron h(...)
Clay Geomaterials Tannin Iron hydroxides Parkia biglobosa pods
ARTICLE
Etude de l’adsorption d’ions fluorures par une bentonite du Niger
Marou Gourouza , Ibrahim Natatou, Karifa Bayo , Anne Boos
Résumé : Nous avons étudié la capacité de défluoruration d’une argile de Sabon-karré de la région de Tahoua en
République du Niger. L’argile brute n’adsorbe pas les fluorures, il en libère au contraire. La calcination de cette argile, à
700°C pendant 6 h, a permis la génération de sites d’adsorption de fluorures. Le pourcentage de fluorures(...)
Mots clés : Argile ; calcination ; adsorption ; défluoruration
ARTICLE
Refractory bricks based on Tikaré (Burkina Faso) kaolinitic raw clay material
Mohamed Seynou, Pierre Flament, Moustapha Sawadogo, Jacques Tirlocq, Raguilnaba Ouedraogo
A raw clay material deposit in Burkina Faso has been used for refractory bricks production in the lab. The
extruded raw clay material has been fired at 1400°C to produce a chamotte grog that has been crushed into different
particle sizes. These have been mixed with 14%.wt of the raw clay material as a binder. The admixture has then been(...)
Refractory bricks, refractoriness under load, mullite, cristobalite
ARTICLE
In vitro antifungal activity of flavonoid diglycosides of Menthapiperita and their oximes derivatives against two cereals fungi
Ousmane Ilboudo, Schémaeza Bonzi, Issa Tapsoba, Irénée Somda, Yvonne L. Bonzi-Coulibaly
Flavonoids due to their various interesting biological properties such as antifungal activity were investigated in Mentha piperita leaves. The butanolic fraction obtained from the hydro-alcoholic crude extract of M. piperita is rich in flavonoids; it reduced in vitro the mycelium growth of Phoma sorghina and Fusarium moniliforme around 72% and(...)
Mots clés non renseignés
ARTICLE
Soil crusting impact on soil organic carbon losses by water erosion
S. Maïga-Yaleu, I. Guiguemde, H. Yacouba, H. Karambiri, O. Ribolzi, A. Bary, R. Ouedraogo, V. Chaplot
The Sahelian region, characterized by erratic, heavy rainfalls and low soil organic carbon (SOC) stocks, is highly vulnerable to land degradation. While water erosion is recognized as being a main mechanism of SOC losses, little research has yet been done to investigate the role which soil surface crusting might have on SOC losses. The main ob(...)
Erosion, Soil organic carbon, Soil surface crust, Enrichment ratio
ARTICLE
Comportement thermique de céramiquesà base d’argiles naturelles du Burkina Faso
Lamine Zerbo1*, Brahima sorgho1 , Sié Kam2 , Julien Soro3 , Younoussa Millogo1 , Boubié Guel4 , Karfa Traoré1 , Moussa Gomina5 , Philippe Blanchart3
Le comportement thermiquede céramiques élaborées à partir d’argiles locales du Burkina Faso a été caractérisé dans cette étude. L’argile SIT est composée majoritairement de montmorillonite,de quartz, d’albite de kaolinite et d’illite, tandis que l’argile GAR contient les phases majeures que sont le talc, la dolomite et la chlorite. Des mélange(...)
argiles locales ;conductivité thermique ; choc thermique ; résistance résiduelle
ARTICLE
Growth and characterization of large, high quality MoSe2 single crystals
Moussa Bougouma ,Abdelkrim Batan , Boubie´ Guel , Tiriana Segato , Jean B. Legma , Francois Reniers , Marie-Paule Delplancke-Ogletree , Claudine Buess-Herman , Thomas Doneux ,
MoSe2 single crystals were grown by chemical vapor transport using TeCl4 as transport agents in the
temperature gradient 1020–980 1C. They were characterized by scanning electron microscopy (SEM),
optical microscopy, image analysis coupled with SEM, microanalysis by SEM-EDX, X-ray fluorescence,
inductively coupled plasma (ICP), X-ray photoe(...)
Mots clés non renseignés