Materials and Biomaterials Science <p><strong>Journal Overview</strong></p> <p>Materials and Biomaterials Science provides a unique forum for the discussion of novel processing, applications and theoretical studies of functional materials and biomaterials for (opto)electronics, sensors, detectors, biotechnology and green energy.&nbsp;This journal encompasses insights into the chemistry, biology and materials science underpinning (bio) materials research, new concepts in biomaterials design, and using materials to answer fundamental questions.</p> <p><span lang="EN-GB"><strong>ISSN:&nbsp;</strong>2661-7226</span></p> <p><span lang="EN-GB"><strong>Abbreviation:</strong>&nbsp;Mater. Biomater. Sci.</span></p> en-US <p>Copyright © 2019 Journal of Materials and Biomaterials Science&nbsp;</p> (A. Henni) (For more informations) Mon, 01 Jun 2020 00:00:00 +0200 OJS 60 Production of solar hydrogen at desert site of algeria <p>Hydrogen is a sustainable fuel option and one of the potential solutions for the current energy and environmental problems. Renewable energy–hydrogen systems for remote applications constitute an early niche for sustainable hydrogen energy. Optimal matching between the photovoltaic (PV) system and the electrolyzer is essential for maximum electrical energy transfer and hydrogen production.&nbsp;This paper concerns the study of an autonomous hydrogen production system basically consisting in a solar panel array supplying an alkaline electrolyzer. The system used photovoltaic (PV) modules, an alkaline electrolyzer, and an optimized direct connection between the PV and electrolyzer systems.The data supplied by the experimental system clearly showed the importance of considering the efficiency of photovoltaic module to hydrogen generator efficiency when designing an optimum solar hydrogen system.</p> <p><strong>Keywords: </strong>Solar; Hydrogen; Electrolyzer; Photovoltaic; Alkaline; Algeria.</p> <p><strong>Downloads :</strong></p> Noura Chaouch, Khadidja Bouziane ##submission.copyrightStatement## Thu, 09 Jan 2020 17:05:09 +0100 Performance of magnesium-based sacrificial anode for cathodic protection of steel in simulated saline solution <p>Magnesium is widely used as a sacrificial anode for protecting steel from corrosion. In this paper, the electrochemical behaviour of magnesium sacrificial anodes has been studied using electrochemical impedance spectroscopy (EIS) and polarisation curves, completed by Evans’ diagrams (under galvanic conditions) and SEM observations. The impedance diagrams are composed of two capacitive loops at the high and middle frequencies; the first one is related to the charge transfer resistance in parallel to the double layer capacity, the other one is attributed to the magnesium ion concentration. An inductive loop at low frequencies appeared as due to the formation, adsorption and desorption of the corrosion products, on the surface of the anodes. The intensiostatic curves permit the evaluation of the anodes efficiency as a function of the current flow. The obtained Evans’ diagrams are discussed taking into account the polarization effects at the electrodes for different experimental conditions.</p> <p><strong>Keywords:&nbsp;</strong>Corrosion protection; Sacrificial anodes; Magnesium; Polarization; Impedance;&nbsp;Raman.</p> <p><strong>Downloads :</strong></p> Hana Ferkous, Imene Chikouche, Souad Djellali, Soufiane Boudjelida, Amina Belakhdar ##submission.copyrightStatement## Sun, 05 Jan 2020 11:37:45 +0100 A Synthesis and Characterization of Biodegradable Poly(ethylene succinate). <p>The Biodegradable poly(ethylene succinate)(PESu) was synthesized by melt polycondensation of ethylene glycol and succinic acid. The synthesized polymer was analyzed by <sup>1</sup>H nuclear magnetic resonance (NMR) and Fourier transform-infrared (FT-IR) spectroscopy, diffraction x-rays (DRX) and were confirmed the chemical structure with weight-average molecular weight higher than 60,000 g mol<sup>−1</sup>. We also investigated the Biodegradation of PES by incubating the polymer with micro-organisms such as fungi (<em>Aspergilus Niger</em>) and bacteria (<em>basilus subtili</em>). The decomposition of polymer was confirmed by observed weight loss of the polymer and microbial growth around it and the changing of&nbsp;&nbsp; structure of the polymers were confirmed by IR spectral analyses after biodegradation test.</p> <p><strong>Keywords:&nbsp;</strong>Poly(ethylene succinate); Biodegradable; Characterization; Polymer; Micro-organism.</p> <p><strong>Downloads :</strong></p> Yasmina Khane, Mohamed Beldjillali, Khaldia Sediri, Fatma Dar Kebira, Lahcen Belarbi, Benali Mouffok ##submission.copyrightStatement## Sat, 07 Dec 2019 00:00:00 +0100 Simulation study of an all p-i-n amorphous silicon oxide solar cell <p>For thin film solar cells, it has been reported that using hydrogenated amorphous silicon oxide in absorber layer (with low oxygen concentration) could generate more electricity than hydrogenated amorphous silicon layers in short wavelengths due to wide band gap (E<sub>g</sub>). This work is concerned about the analysis of all p-i-n amorphous silicon oxide based solar cell by numerical simulation. The calculation was carried out by using Analysis of Microelectronic and Photonic Structures (AMPS-1D) simulator. We optimized hydrogenated amorphous silicon oxide (a-SiO<sub>x</sub>: H) as an active layer in the hydrogenated amorphous silicon oxide (a-SiO<sub>x</sub>: H) p-i-n single junction solar cell. We have achieved a power conversion efficiency of 5.716 %. Also, a good agreement between our simulated results and experimental results was obtained.</p> <p><strong>Keywords:</strong> Thin film; Solar cell; Amorphous silicon oxide; AMPS-1D; simulation.</p> <p><strong>Downloads :</strong></p> Wafa Hadj Kouider, Abbas Belfar, Houcine Ait-kaci ##submission.copyrightStatement## Wed, 04 Dec 2019 17:46:19 +0100 XRD, SEM and EIS analysis of electroplated Cu-Zn alloy using Zinc oxide <p>Substitution of cyanide in electroplating is a current challenge. We present an alternative method aiming to reduce the toxicity and the cost of electroplating of Cu-Zn alloy (usually prepared from cyanide baths) while maintaining the decorative qualities and anticorrosive properties of the coating. For this purpose, Cu-Zn alloys were obtained in two steps from non-cyanide electrolytes. First, a copper layer electrodeposited onto a nickel under-layer, followed by a thin layer of zinc from three different simple non-cyanide zinc baths. The Zn/Cu/Ni sandwich system was then subjected to heat treatment at a temperature of 400°C, to ensure the diffusion of zinc into the copper layer to give the desired Cu-Zn alloy structure. The synthesized films were characterized by using X-ray diffraction XRD, scanning electron microscopy and energy dispersive X-ray spectroscopy (EDS). XRD demonstrated that the electrodeposited films are crystalline and present the Cu0.7Zn0.3 phase with preferential (111) orientation. An analysis of XRD patterns revealed that after heat treatment, the Cu-Zn alloys were composed of a predominating α-phase structure. The morphology and composition of the coatings depends on the zinc plating bath type. After annealing, well defined pseudo-spherical Cu-Zn grains were formed covering the entire substrate surface. The EDS analysis indicated the formation of Cu0.7Zn0.3 brass alloys, corrosion was studied by impedance spectroscopy. The results showed the feasibility of this low-cost new route for the preparation of good quality Cu–Zn alloys from cyanide-free electrolytes.</p> <p><strong>Keywords:&nbsp;</strong>Electrodeposition; Cu-Zn alloy; Brass; Non-cyanide bath; Heat treatment;</p> <p><strong>Downloads :</strong></p> Ilyes Abacha, Salah Boukhrissa ##submission.copyrightStatement## Sun, 24 Nov 2019 00:00:00 +0100 Synthesis, Characterization and In vitro evaluation of antibacterial and antifungal activities of New Schiff Base and Its Metal Complexes <p>A new potentially pentadentate Schiff base ligand <strong>L</strong> has been prepared via the condensation of diethylenetriamine and 2’-hydroxyacetophenone in the molar ratio of 1:2 in absolute ethanol and characterized by elemental analyses and UV, IR spectroscopy. Mn(II), Ni(II), Co(II), Cu(II),Fe(III),Mg(II),Cd(II) and Zn(II) complexes were prepared by reaction of <strong>L</strong>,dissolved in ethanol, with an appropriate metal salt, have been characterized by UV and IR spectroscopy. Furthermore, the synthesized compounds were screened for antibacterial and antifungal activities. Almost all of these compounds showed moderate to excellent antimicrobial activity against four gram negative bacteria (<em>Escherichia coli</em>, <em>Salmonella typhimurium</em>, <em>Acinetobacter</em><em> baumannii</em> and <em>Citrobacter</em><em> freundii</em>), two gram positive bacteria (<em>Enterococcus faecalis</em> and<em>Lysteria</em><em> monocytogenes</em>), pathogenic fungal strains (<em>Candida albicans</em>, <em>Aspergillus niger, Aspergillus flavus </em>and <em>fusarium </em><em>oxysporum</em>). The activities were confirmed by Activity Index (AI). Activity Index values were found to be higher for Cd(II)&nbsp; followed by Co(II) and the other compounds. The Minimum Inhibitory Concentration (MIC) <strong>L</strong> and its metal complexes were also determined.</p> <p><strong>Keywords:</strong> Schiff base; Complexes; &nbsp;Synthesis; Bacteria; Fungus.</p> <p><strong>Downloads :</strong></p> <p>&nbsp;</p> Salim Madani, Kamel Mokhnache, Azeddine Rouane, Noureddine Charef ##submission.copyrightStatement## Wed, 20 Nov 2019 16:26:28 +0100