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GHEZINI Rachid
LABORATOIRE DE CHIMIE DES MATERIAUX - LCM
Article 04 :Année de publication 2017
Titre Synthesis of MIL-101@g-C 3 N 4 nanocomposite for enhanced adsorption capacity towards CO 2
   
Revue, référence Journal of Porous Mater, J Porous Mater DOI 10.1007/s10934-017-0433-y
   
Autres auteurs Asmaa Argoub 1 • Rachid Ghezini 1 • Cherifa Bachir 1
2 • Bouhadjar Boukoussa 1
3 • Amine Khelifa 4 • Abdelkader Bengueddach 1 • Peter G. Weidler 5 • Rachida Hamacha 1
   
Mots Clefs MIL-101 Carbon nitride MIL-101@g-C 3 N 4 nanocomposite CO 2 adsorption Adsorption isotherms
   
Résumé
   MIL-101@g-C 3 N 4 nanocomposite was prepared by solvothermal synthesis and used for CO 2 adsorption. The parent materials (MIL-101 and g-C 3 N 4 ) and the MIL-101@g-C 3 N 4 were characterized by X-ray diffraction, argon adsorption/desorption, Fourier transform infrared spectroscopy, thermal analysis (TG/DTA), transmission electronic microscopy, and Energy-dispersive X-ray spectroscopy. The results confirmed the formation of well-defined MIL-101@g-C 3 N 4 with interesting surface area and pore volume. Furthermore, both MIL-101 and MIL-101@g-C 3 N 4 were accomplished in carbon dioxide capture at different temperatures (280, 288, 273 and 298 K) at lower pressure. The adsorption isotherms show that the nanocomposite has a good CO 2 adsorption affinity compared to MIL-101. The best adsorption capacity is about 1.6 mmol g −1 obtained for the nanocomposite material which is two times higher than that of MIL-101, indicating strong interactions between CO 2 and MIL-101@g-C 3 N 4 . This difference in efficacy is mainly due to the presence of the amine groups dispersed in the nanocomposite. Finally, we have developed a simple route for the preparation of an effective and new adsorbent for the removal of CO 2 , which can be used as an excellent candidate for gas storage, catalysis, and adsorption.
Article 03 :Année de publication 2016
Titre Enhanced hydrogen storage capacity of copper containing mesoporous silicas prepared using different methods
   
Revue, référence Materials. Research. Express, Mater. Res. Express 3 ( 2016 ) 085501
   
Autres auteurs Housseyn Sekkiou
Bouhadjar Boukoussa
Ghezini Rachid
   
Mots Clefs mesoporous materials , MCM-41, copper, CuO, hydrogen adsorption
   
Résumé
   This paper focuses on the synthesis ofmesoporous materials, Al-MCM-41, doped with copper using different methods. The results show that the method ofsynthesis affects the structural and textural properties of these solids. Their application in hydrogen storage shows that the adsorption is enhanced when using a solid containing Cu +2 ions, with an adsorption capacity around 1.8 wt% at 77 K, while the solids containing CuO particles present a medium adsorption capacity. Temperature variation plays a very important role in determining the adsorption capacity and the best results are obtained at 77 K.
Article 02 :Année de publication 2016
Titre Synthesis of polypyrrole/Fe-kanemite nanocomposite through in situ polymerization: effect of iron exchange, acid treatment, and CO2 adsorption properties
   
Revue, référence Journal of Mater Science, J Mater Sci (2017) 52:2460–2472
   
Autres auteurs Bouhadjar Boukoussa 1
2
*
Fatiha Abidallah 2
Zakaria Abid 1
Zoulikha Talha 1
Nafissa Taybi 1
Hadjer Sid El Hadj 1
Rachid Ghezini 1
Rachida Hamacha 1
and Abdelkader Bengueddach 1
   
Mots Clefs exchange CO2 adsorption Fe nanocomposite
   
Résumé
   This paper focuses on the synthesis of polypyrrole/Fe-kanemite nanocomposites by in situ polymerization of pyrrole. Different percentages of PPy/Fe-kan have been prepared and tested for the CO 2 adsorption. Fe-exchanged kanemite was prepared using various iron contents and used as an oxidant for the preparation of PPy/Fe-kan nanocomposite. The obtained materials were characterized using various techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy, ultraviolet–visible (UV–vis), thermogravimetric analysis TGA, energy dispersive X-ray analysis, scanning and transmission electronic microscopy (SEM, TEM). Based on the XRD and UV–vis analysis, the exchange process leads to the formation of various iron species on the external and internal surface. The thermal stability of PPy/Fe-kan was improved and increased in the following order PPy/Fe-kan (1%) [ PPy/Fe-kan (3%) [ PPy/ Fe-kan (5%) [ PPy/Fe-kan (10%) [ PPy. SEM and TEM analysis show that the nanocomposite particles have spherical morphology with a high dispersion of the Fe-kanemite in the polymer matrix. CO2 adsorption at 0 and 15 C was carried using a volumetric method, and the recorded isotherm indicated that the CO2 adsorption capacity of PPy/Fe-kan can be enhanced through modification by polypyrrole. The unmodified Na-kanemite has low CO 2 adsorption capacity around 0.05 mmol g-1 at 15 C, while the PPy/Fe-kan (5%) nanocomposite presented the best CO 2 adsorption capacity around 1.7 mmol g-1 at 0 C under low pressure that is mainly attributable to physical adsorption.
Article 01 :Année de publication 2008
Titre Adsorption of carbon dioxide at high pressure over H-ZSM-5 type zeolite. Micropore volume determinations by using the Dubinin–Raduskevich equation and the ‘‘t-plot” method.
   
Revue, référence Microporous and Mesoporous Materials, Volume 113, Issues 1-3, 1 August 2008, Pages 370-377
   
Autres auteurs Ghezini Rachid SASSI Mohamed
   
Mots Clefs Adsorption, Carbon dioxide, Dubinin–Raduskevich equation, Micropore volume, t-Plot method
   
Résumé
   In this paper, a study of the adsorption of carbon dioxide at high pressure and at the temperatures of 273 K and 293 K in H-ZSM-5 zeolite is reported. The results show that the measured adsorption isotherms obey the Dubinin–Raduskevich equation and the invariance condition of temperature is ful.lled. This implies that adsorption in this zeolite is not a surface process, but is rather a volume .lling. The proposed methodology for the analysis of the experimental adsorption data allows the determination of the micropore volume (W0) and the characteristic energies (E). An experimental value of W0 equal to 0.184 cm3/g is obtained in good agreement with the literature. The ‘‘t-plot” method, adapted for the .rst time in this work to the adsorption of carbon dioxide is also used in order to calculate the micropore volume. A value of W0 equal to 0.163 cm3/g is obtained in very good agreement with those found using the ‘‘t-plot” method and the universal t-equation for the adsorption of nitrogen at 77 K.



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