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SASSI Mohamed
LABORATOIRE DE CHIMIE DES MATERIAUX - LCM
Article 08 :Année de publication 2017
Titre Preparation and characterization of layered silicate magadiite intercalated by Cu2+and Zn2+ for antibacterial behavior
   
Revue, référence Journal of Porous Materials, DOI 10.1007/s10934-017-0402-5
   
Autres auteurs Adel Mokhtar Amal Djelad Abdelkader Boudia Mohamed Sassi Abdelkader Bengueddach
   
Mots Clefs Cu-magadiite Zn-magadiite Ion-exchange Layer silicates Antibacterial activity
   
Résumé
   The purpose of this work is the synthesis of two series of layered silicate materials with different ratios(10, 30, 50, 80 and 100) of Cu(NO3)2, or Zn(NO3)2 by ion-exchange method. Several analysis techniques have been used such as X-ray diffraction, energy dispersive X-ray spectroscopy, thermogravimetric analysis, scanning electron microscope and Fourier transform infrared spectroscopy. The results revealed that ion-exchange method of copper and zinc with different ratios did not affect the structure of Na-magadiite. The gap between the theoretical and experimental ion-exchange are in agreement. Antibacterial activity test against Escherichia coli, Rhizobium sp.and Staphylococcus demonstrate that when ratio was (30,50, 80 and 100) the antibacterial activity of the layered silicate materials showed high antibacterial activity.
Article 07 :Année de publication 2017
Titre Preparation of new microporous titanium pillared kenyaite materials active for the photodegradation of methyl orange
   
Revue, référence Journal of Porous Materials, Springer
   
Autres auteurs Bechikh Aicha Sassi Mohamed Miehe‑Brendle Jocelyne Lebeau Benedicte Blin Jean‑Luc Bengueddach Abdelkader
   
Mots Clefs Kenyaite • Magadiite Hydrothermal synthesis Titanium oxide pillaring • Photocatalysis
   
Résumé
   In recent years, layered silicates have extensively been used to design new nanomaterials through functionalization. In this work, the lamellar sodium silicates magadiite and kenyaite have been hydrothermally synthesized in presence of ethanol as organic co-solvent. Materials of high purity and high crystallinity were obtained after only24 hours of crystallization at a temperature of 180°C for kenyaite and a temperature of 150°C for magadiite. It appears that the presence of ethanol in the synthesis medium tends not only to increase the crystallization rate, but also to stabilize the formation of magadiite.The as-synthesized Na-kenyaite was used as precursor for the preparation of titanium pillared clay materials. The resulting microporous titanium oxide pillared kenyaite materials exhibit large specific surface areas up to180 m2.g-1 with a Ti contents up to 24 wt% and are active for the photocatalytic degradation under UV light irradiation of the organic dye methyl orange in water.
Article 06 :Année de publication 2017
Titre Structure and intercalation behavior ofcopper II on the layered sodium silicate magadiite material
   
Revue, référence Chemical Papers, Chem. Pap. DOI 10.1007/s11696-017-0255-z
   
Autres auteurs Adel Mokhtar Zohra Aouali Kebir Medjhouda Amal Djelad Abdelkader Boudia Abdelkader Bengueddach Mohamed Sassi
   
Mots Clefs Ion exchange Copper Magadiite Layered silicate Structure
   
Résumé
   In this work, the ion-exchange reaction of the sodium silicate Na-magadiite with cupric ions was studied and the mode of interaction of the intercalated Cu2+Ions with silicate sheet was investigated. To do this, Na-magadiite was first synthesized using a hydrothermal method and characterized. It is then used to prepare Cu-exchanged magadiite materials with different copper contents by an ion-exchange reaction. The solids obtained were characterized by chemical and thermogravimetric analyses, powder X-ray diffraction, UV–Visible diffuse reflectance and Fourier transform spectroscopy, scanning electron microscopy and transmission electron microscopy. The results show that magadiite has a high affinity to copper ions and that the experimental exchange rate can be easily predicted. They show also that the intercalated Cu2+ ions are non-hydrated and are in direct interactions with the terminal interlayer :Si–O- groups, to which they are also probably strongly linked. Furthermore, the interlayer copper oxide species phase formed are in form of small particles homogeneously dispersed. Finally, the introduction of Cu2? ions into the interlayer space does not substantially affect the structure of the Cu-exchanged materials but rather tends to stabilize it by increasing the decomposition temperature of the silanol groups .
Article 05 :Année de publication 2017
Titre AMELIORATION OF ADSORPTION CAPACITY OF ALGINATE’S BEADS BY INCOPORATING MAGADIITE: THE EFFICIENT REMOVAL OF CRYSTAL VIOLET DYE IN AN AQUEOUS SOLUTION
   
Revue, référence Scientific Research Abstract, Scientific Research Abstract Vol 7 p 810-2017. ISSN 2464-9147.
   
Autres auteurs Youcef Yahia Amal Djelad Lala Setti Belaroui Abdelkader Bengueddach Mohamed Sassi
   
Mots Clefs
   
Résumé
   Résumé (Abstract) Dyes are widely used in printing, food, cosmetics and in textile industries for their chemical stability, the ease of synthesis and variety of colors. However, these dyes are can potentially cause pollution once they are released in the environment[1]. Crystal violet (CV) is a cationic dye that is widely applied to colour paper, hair, dye cottons, and wool. The dye is regarded as a biohazardous substance[2]. Magadiite is is a rare polysilicates, which has unique adsorption and swelling properties[3]. These properties could promote its application as an adsorbent for environmental pollutants [4]. The main aim of this study was to combine the gelling and adsorption properties of alginate (a linear polysaccharide, natural, hydrophilic and biocompatible) with magadiite’s characteristics for efficient removal of CV dye from an aqueous solution.We started by the preparation of alginate’s beads. Then, synthesis of composite’s beads (Alg:Mag) to finally carry out the adsorption’s CV test on these materials. The dye removal adsorption studies were performed by varying different parameters like pH (0-8), initialconcentration of CV (10–300 mg/L), ratio of Alg/Mag(5–60%) and adsorbent’s dose (0.2–6 g). Maximum dye removal was observed by (Alg:Mag) at a pH of 3.5, 3 g of adsorbent with ration 60% of Mag/Alg, 50 mg/L dye concentration and 120 min of contact time. The process of dye removal followed a pseudo second-order kinetics rather than pseudo first order.The results from the experimental data reveal that beads of (Alg:Mag) have proved to be an excellent adsorbent material for the removal of CV dye.
Article 04 :Année de publication 2017
Titre Synthesis and Characterization of the New Lacunar Zincophosphate [C6H10N2][ZnP2O8H2]∙0.6H2O
   
Revue, référence Zeitschrift für anorganische und allgemeine Chemie, 10.1002/zaac.201700189
   
Autres auteurs Nadjet Chouat Emanuelle Ligner Mohamed Sassi Mohammed Abdelkrim Hasnaoui Laure Michelin Ludovic Josien Claire Marichal Abdelkader Bengueddach Joël Patarin Jean
Louis Paillaud
   
Mots Clefs
   
Résumé
    The new zincophosphate of chemical formula [C6H10N2][ZnP2O8H2]∙0.6H2O was hydrothermally synthesized with pphenylenediamine as structure-directing agent. The titled compound crystallizes in the trigonal symmetry (proposed space group P-3m1) where inorganic zincophosphate chains form layers due to the half occupancy of the unique crystallographic zinc site. The layers are separated from each other by p-phenylenediammonium dications with a hydrogen-bonding scheme involving the ammonium protons that reveals a pillar-like 3D structure aspect. The compound was characterized by powder X-ray diffraction, multinuclear solid-state NMR, scanning electron microscopy, chemical analysis and thermogravimetric analysis.
Article 03 :Année de publication 2016
Titre Lead(II) removal from aqueous solutions by organic thiourea derivatives intercalated magadiite
   
Revue, référence Desalination and Water Treatment, 57(2016) 9383-9395
   
Autres auteurs Soumia Benkhatou Amal Djelad Mohamed Sassi Mohamed Bouchekarac Abdelkader Bengueddach
   
Mots Clefs Na-magadiite Hydrothermal synthesis Intercalation Thiourea derivatives Lead; Adsorption
   
Résumé
   In this work, a layered silicate magadiite-Na (Mag) is hydrothermally synthesized and used to prepare organic thiourea-intercalated magadiite. It is organically modified by N-(2-methoxyphenyl)-N´-(2-methylphenyl)-thiourea (TMMe) and N-(2-methoxyphenyl)-N´- (2-methoxyphenyl)-thiourea (TMM) without preintercalation with a cationic surfactant. These materials are characterized by X-ray diffraction, infrared spectroscopy, and scanning electron microscopy. Due to the increment of basic centers attached to the pendant chains, the metal adsorption capacities of the final chelating materials are found to be higher than the precursor. The ability of these materials to remove Pb(II) from an aqueous solution is followed by a series of adsorption isotherms at a temperature of 25°C, pH 5 and pH 7. The kinetic parameters analyzed by the Lagergren and Ho and Mc Kay models give a good fit for a pseudo-second-order reaction for all systems. The adsorption isotherm data follow the Langmuir equation where parameters are calculated. Mag/TMM has a better lead(II) removal capacity (33.44 mg/g) at pH 5 than Mag/TMMe (19.9 mg/g) and Mag (9.91 mg/g) at pH 7.
Article 02 :Année de publication 2015
Titre Lead(II) removal from aqueous solutions by organic thiourea derivatives intercalated magadiite
   
Revue, référence Desalination and Water Treatment, (2015) 1-13
   
Autres auteurs Soumia Benkhatou
Amal Djelad
Mohamed Sassi
Mohamed Bouchekarac
Abdelkader Bengueddach
   
Mots Clefs Na-magadiite, Hydrothermal synthesis, Intercalation, Thiourea derivatives, Lead; Adsorption
   
Résumé
   In this work, a layered silicate magadiite-Na (Mag) is hydrothermally synthesized and used to prepare organic thiourea-intercalated magadiite. It is organically modified by N-(2-methoxyphenyl)-N´-(2-methylphenyl)-thiourea (TMMe) and N-(2-methoxyphenyl)-N´- (2-methoxyphenyl)-thiourea (TMM) without preintercalation with a cationic surfactant. These materials are characterized by X-ray diffraction, infrared spectroscopy, and scanning electron microscopy. Due to the increment of basic centers attached to the pendant chains, the metal adsorption capacities of the final chelating materials are found to be higher than the precursor. The ability of these materials to remove Pb(II) from an aqueous solution is followed by a series of adsorption isotherms at a temperature of 25°C, pH 5 and pH 7. The kinetic parameters analyzed by the Lagergren and Ho and Mc Kay models give a good fit for a pseudo-second-order reaction for all systems. The adsorption isotherm data follow the Langmuir equation where parameters are calculated. Mag/TMM has a better lead(II) removal capacity (33.44 mg/g) at pH 5 than Mag/TMMe (19.9 mg/g) and Mag (9.91 mg/g) at pH 7.
Article 01 :Année de publication 2015
Titre Crystal structure of a new homochiral one-dimensional zincophosphate containing L-methionine
   
Revue, référence Acta Crystallographica E, Acta Cryst. (2015). E71, 832–835
   
Autres auteurs Nadjet Chouat
Mohammed Abdelkrim Hasnaoui
Mohamed Sassi
Abdelkader Bengueddach
Gigliola Lusvardi
Andrea Cornia
   
Mots Clefs crystal structure, Hydrothermal synthesis, zincophosphates, methionine, hybrid, materials, homochiral structure
   
Résumé
   catena-Poly[[(l-methionine-_O)zinc]-_3-(hydrogen phosphato)-_3O:O0:O00], [Zn(C5H11NO2S)]n, a new one-dimensional homochiral zincophosphate, was hydrothermally synthesized using l-methionine as a structuredirecting agent. The compound consists of a network of ZnO4 and (HO)PO3 tetrahedra that form ladder-like chains of edge-fused Zn2P2O4 rings propagating parallel to [100]. The chains are decorated on each side by zwitterionic l-methionine ligands, which interact with the inorganic framework via Zn—O coordination bonds. The structure displays interchain N—H_ _ _O and O—H_ _ _S hydrogen bonds.



Sunday. 19/08/2018 10:08:17