Publications Internationales

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Subject: search.filters.subject.Nanocomposite

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    Eco-friendly Ca/α-Fe2O3/ZnO/CuO nanocomposite: Green synthesis, characterization, and high-efficiency heavy metal removal from contaminated sludge
    (John Wiley and Sons Inc, 2025) Saoud, Abdesselam; Bouafia, Abderrhmane; Meneceur, Souhaila; Younsi, Ferroudja
    This study explores the green synthesis of Ca/α-Fe2O3/ZnO/CuO nanocomposite using Mentha pulegium L. leaf extract as a bioreducing and stabilizing agent for eco-friendly remediation. XRD confirmed a multiphase crystalline structure—cubic Ca, rhombohedral α-Fe2O3, hexagonal ZnO, and monoclinic CuO—with an average crystallite size of 24.42 ± 3.07 nm. SEM revealed ~50 nm agglomerated nanoparticles with rough surfaces, enhancing catalytic reactivity. FTIR identified metal–oxygen bonds (FeO, ZnO, CuO, CaO) and plant-derived functional groups, confirming stabilization. UV–Vis showed strong absorption at 275 nm with direct (3.07 eV) and indirect (1.70 eV) bandgaps, suitable for UV/visible-light applications, and the low Urbach energy (0.211 eV) further reflected the material's high crystallinity. TGA-DSC demonstrated 49% residual mass at 1200°C, reflecting strong thermal stability. A zeta potential of −29.06 mV ensured colloidal stability. The nanocomposite efficiently removed heavy metals from petroleum sludge, achieving 84.1% (Pb), 74.6% (Zn), 72.3% (Se), and 73.7% (Cr), while arsenic removal was relatively lower at 24.9%, highlighting current adsorption challenges. Adsorption involved diffusion and chemical fixation, underscoring potential in remediation, photocatalysis, and optoelectronics
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    Improving the Environmental Sustainability through Efficient Recycling and Valorization of Polypropylene (PP)/Polyamide 66 (PA66)/Nanoclay Nanocomposite Blends with Recycled Polypropylene
    (Taylor and Francis Ltd, 2024) Sid, Asma Nour El Houda; Kouini, Benalia; Bezzekhami, Mohammed Amin
    Polypropylene/polyamide 66 composites were enhanced by introducing a polypropylene anhydrous melamine graft agent (PP-g-AM) and by adding different contents of recycled polypropylene (rPP). The composite was prepared using an internal mixer. Our research described here aimed to investigate the processing, production, and characteristics of the synthesized nanocomposites. The properties and structure of the mixtures were summarized to determine the optimal ratio of adding rPP in the nanocomposite (rPP/PP-g-AM/PA66). To comprehend the impact of rPP on the properties of the nanocomposite and the effectiveness of adding rPP for polymer blends/clay nanocomposites, we performed a rheological study and evaluated the mechanical, thermal, and barrier properties. X-ray diffraction analysis demonstrated the formation of an exfoliated structure of the mixtures of PP/PP-g-MA/PA66 reinforced with rPP. Through significant mechanical improvement, the mixtures showed better resistance to impact forces. Thermal analysis highlighted an increase in the mixtures’ stability under heat. Additionally, the carefully designed mixtures presented interesting barrier qualities.
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    Properties of clay/graphene/thermoplastic nanocomposites in relation to their composition : synergetic effect of hybrid nanofillers and role of matrix
    (Elsevier, 2022) Mederic, Pascal; Rahmaoui, Fath Eddine Zakaria; Ait Hocine, Nourredine
    The structural, rheological, thermal and mechanical properties of composites, constituted of a polyamide 12 filled with commercial graphene nanoplatelets and organically modified nanoclays, were investigated. Different graphene/clay ratios were used in order to better understand the role played by each kind of filler in the improvement of the end-use properties of prepared composites. With this aim in view, the dispersion state of fillers in ternary nanocomposites was evaluated in comparison with those of graphene PA and clay PA binary composites. Measured rheological and mechanical properties of ternary systems were discussed in comparison with those calculated as the sum of the contributions of graphene and clay in the PA matrix, underlining the combined roles of both fillers in the improvement of composite properties. On the other hand, structural and end-use properties of the 5 wt% graphene 5 wt% clay PA material were compared with those obtained in the past for the composite constituted with a high viscous polyethylene/maleic anhydride grafted polyethylene matrix filled with same commercial graphene nanoplatelets (5 wt%) and similar organically modified montmorillonite fillers (5 wt%). This comparison aimed at understanding the role played by the matrix in the dispersion states of both clay and graphene fillers, and consequently in the end-use properties of composites
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    Contribution of the organo-montmorillonite/graphene pair to the rheological and mechanical properties of polyethylene matrix based nanocomposites
    (Elsevier, 2017) Rahmaoui, Fath Eddine Zakaria; Mederic, Pascal; Aït Hocine, Nourredine; Aït Saada, Aïcha; Poirot, Nathalie; Belaidi, Idir
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    Synthesis of nanocomposites based semiconductors of PPy(Cl)/Zeolite HY
    (Syscom 18 SRL, 2015) Hamidouche, Fahim; Djelali, Nacer-Eddine
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    Elaboration and characterization of conducting nanocomposite inorganic/organic
    (Editions de l'Academie Republique Populaire, 2014) Ghebache, Z.; Djelali, Nacer-Eddine; Zitouni, S.
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    Elaboration of cellulose based nanobiocomposite : effect of cellulose nanocrystals surface treatment and interface "melting"
    (Elsevier, 2015) Timhadjelt, Lamia; Serier, Aicha; Belgacem, Mohammed Naceur; Bras, Julien