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Open Access Article
1 - Synthesis of tin (II) oxide nanoparticles using oregano plant extract and its application in fatty alcohols esterification
sara mohseni tavana kosar amirsadeqi Roya Kiani-Anbouhi Elaheh Bohloulbandi mohamad hadi ghasemiThe aim of this research is to use oregano plant extract as an economical and safe green alternative for the synthesis of tin (II) oxide nanoparticles and its application in the esterification of fatty alcohols. Thus, for the synthesis of tin (II) oxide nanoparticles, o MoreThe aim of this research is to use oregano plant extract as an economical and safe green alternative for the synthesis of tin (II) oxide nanoparticles and its application in the esterification of fatty alcohols. Thus, for the synthesis of tin (II) oxide nanoparticles, oregano plant extract and tin (II) chloride were used. The obtained tin (II) oxide nanoparticles were used as nanocatalysts in the esterification of fatty alcohols. Using equivalent amounts of acetic anhydride: lauryl alcohol (1:1) in solvent-free conditions, at 80°C for 60 minutes, lauryl acetate ester was synthesized (Ra=83%). By using cetyl alcohol and increasing temperature to 90°C for 120 minutes, cetyl acetate ester was synthesized (Ra=81%). Lauryl acetate and cetyl acetate are in the formulation of many insect sex pheromones and can be used as attractants in traps for monitoring and trapping agricultural pests. The results of this research showed that anhydrous tin (II) oxide synthesized by the green method was suitable for catalyzing the esterification reaction of fatty alcohols. High efficiency, no use of expensive and toxic amine solvents, simplicity of the catalyst synthesis and recycling, simplicity of the esterification method using the catalyst, and reuse of the catalyst in consecutive reactions (3 consecutive reactions with 88, 85 and 81% efficiency, using acetic anhydride: lauryl alcohol 1.5:1) is one of the advantages of the method. Manuscript profile -
Open Access Article
2 - Catalytic evaluation of ceria supported LaCu0.3Mn0.7O3 perovskites in reduction of NOx in automobile exhaust
parastoo Delir kheyrollahi Nezhad Aligholi Niaei Ali Farzi Bernhard Kloetzer Simon PennerSupported perovskite LaCu0.3Mn0.7O3-xCeO2 (x= wt.%) catalysts were prepared via sol-gel method. Different amount of ceria were used for preparation of the catalysts in order to investigate the effect of CeO2 in the catalytic behavior of the corresponding catalyst. With MoreSupported perovskite LaCu0.3Mn0.7O3-xCeO2 (x= wt.%) catalysts were prepared via sol-gel method. Different amount of ceria were used for preparation of the catalysts in order to investigate the effect of CeO2 in the catalytic behavior of the corresponding catalyst. With the aim of comparison, the perovskite without ceria and pure ceria were also synthesized and calcined exactly at the same condition applied for preparation of the other catalysts. The prepared catalysts were characterized by using X-ray powder diffraction, surface area analysis) BET(, and scanning electron microscopy. Catalytic performance of the samples was investigated in NO reduction with CO as reductant. The synergistic effect of both perovskite and ceria in the catalyst led to catalytically decreased on-set temperature to about 150 °C. According to the characterization analysis, with having LCM37 and ceria in the bulk of the catalysts, the dispersion of the elements was homogenous. Surface morphology was homogenous with respect to dispersion and size of the particles. On the other hand, the catalytic performance varies slightly according to changing the percentage of ceria which has been used. The better performance was observed for the catalyst containing 25 wt.% of ceria. Manuscript profile -
Open Access Article
3 - Abstract
Synthesis of tin (II) oxide nanoparticles using oregano plant extract and its application in fatty alcohols esterification S. Mohseni Tavana, K. Amirsadeqi, R. Kiani-Anboui, E. Bohloulbandi and M. H Ghasemi Catalytic evaluation of ceria supported LaCu0.3Mn0.7O3 per MoreSynthesis of tin (II) oxide nanoparticles using oregano plant extract and its application in fatty alcohols esterification S. Mohseni Tavana, K. Amirsadeqi, R. Kiani-Anboui, E. Bohloulbandi and M. H Ghasemi Catalytic evaluation of ceria supported LaCu0.3Mn0.7O3 perovskites in reduction of NOx in automobile exhaust Delir Kheyrollahi Nezhad, A. Niaei, A. Farzi, B. Klötzer and S. Penner Preparation and evaluation of polyvinyl alcohol nanocomposite containing zinc oxide nanoparticles and montmorillonite Motakef Kazemi, E. Molaakbari Daryan and R. Halabian Design, fabrication and catalytic performance of zeolite CaY functionalized with 4-methylpyridinium chloride ionic liquid as a new multifunctional nanocatalyst in the three-component synthesis of isoxazolones Mehdi Kalhor, Zeinab Hozhabri and Zahra Seyedzade Synthesis of dihydropyranocarbonitrile compounds based on kojic acid linked to 1,2,3-triazole ring by click chemistry approach and their evaluation as potential tyrosinase inhibitors Najafi, S. Esmaili, S. Babaee, B. Khaleseh, G. Chehardoli, M. Khoshneviszadeh and T. Akbarzadeh Synthesis and characterization of Fe-Doped hydroxyapatite by in-situ method for use in bone tissue engineering: scaffold application, Biocompatibility and degradation studies Maskanati, H.R. Aghabozorg, M. Meskinfam and F. Motiee Synthesis of graphitic silicon carbide (g-SiC) from gelatin and silica foam for photocatalytic removal of organic and biological pollutants in water Afsharpour and A. Rostami Optimization of electrofenton process in removal of lead and phenanthrene resistant to biodegradation from contaminated soils using response surface method Tabatabai, R. Mafi Gholami, M. Borghei and A. Esrafili Manuscript profile -
Open Access Article
4 - Preparation and evaluation of polyvinyl alcohol nanocomposite containing zinc oxide nanoparticles and montmorillonite
Negar Motakef Kazemi elaheh mollaakbari Raheleh HalabianThe purpose of this research is to investigate the mechanical, antibacterial, and cytotoxic properties of biocompatible polyvinyl alcohol (PVOH) nanocomposite modified with zinc oxide (ZnO) nanoparticles and montmorillonite (MMT) to prepare a film for use in food packag MoreThe purpose of this research is to investigate the mechanical, antibacterial, and cytotoxic properties of biocompatible polyvinyl alcohol (PVOH) nanocomposite modified with zinc oxide (ZnO) nanoparticles and montmorillonite (MMT) to prepare a film for use in food packaging. Zinc oxide nanoparticles were synthesized by hydrothermal method via chemical reduction process. This method was performed using zinc acetate salt as a metal precursor, soda as reductant and water as a solvent for 1 hour at a temperature of 80°C. The samples were characterized by X-ray diffraction (XRD) to evaluate the crystal structure, and field emission scanning electron microscope (FESEM) to check the size of the particles and morphology of the samples. The mechanical properties of the samples were investigated. The obtained results showed that the moisture content in the optimal film was reduced to 1.01 x 10-8 g/m3 and the tensile strength and Young's modulus were increased to 0.492 MPa and 24.1 Pa, respectively. The antibacterial activity against Escherichia coli was evaluated by the agar well method and the final nanocomposite showed the highest antibacterial property with the non-growth halo of 0.64 mm. Cytotoxicity of the samples was recorded using the MTT assay method on the HEK293 cell line after 1, 3, and 5 days. The highest percentage of normal cell viability was observed at the concentration of 0.25 mg/ml of the sample and the final nanocomposite showed the highest cell viability. Based on the obtained results, nanocomposite containing zinc oxide nanoparticles and montmorillonite can have a good potential for use in food packaging industries. Manuscript profile -
Open Access Article
5 - Design, fabrication and catalytic performance of zeolite CaY functionalized with 4-methylpyridinium chloride ionic liquid as a new multifunctional nanocatalyst in the three-component synthesis of isoxazolones
Mehdi Kalhor Zeinab Hozhabri Zahra SeyedzadeIn this study, first zeolite CaY was obtained through the reaction of zeolite NaY with CaCl2. Then it was functionalized by reaction with an organic linker, 3-chloropropyl triethoxysilane, followed by reaction with 4-methylpyridine (4-MePyr IL@CaY). The structure and mo MoreIn this study, first zeolite CaY was obtained through the reaction of zeolite NaY with CaCl2. Then it was functionalized by reaction with an organic linker, 3-chloropropyl triethoxysilane, followed by reaction with 4-methylpyridine (4-MePyr IL@CaY). The structure and morphology of this new multi-functional nanoporous material were investigated and identified using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDS), thermogravimetric analysis (TGA-DTA) and Brunaeur-Emmet-Teller (BET) instrumental analyses. The catalytic activity of this multifactorial nanosystem in the easy synthesis of 4-(arylidene)-3-methyl-5-(4H)-isoxazolones was investigated through the three-component condensation reaction of various benzaldehydes, hydroxylamine hydrochloride and ethyl acetate under green conditions. One of the obvious advantages of this nanocatalyst is the presence of Lewis acid (Ca2+) sites and ionic liquid 4-methylpyridinium chloride on a nanoporous solid substrate, which can be very important and instructive in multi-component syntheses. Simplicity of process, catalyst recyclability and easy product separation, high yield and mild conditions are other advantages of this procedure. Manuscript profile -
Open Access Article
6 - Synthesis of dihydropyranocarbonitrile compounds based on kojic acid linked to 1,2,3-triazole ring by click chemistry approach and their evaluation as potential tyrosinase inhibitors
Zahra Najafi Soheila Esmaili Saeed Babaee Behnam Khaleseh Gholamabbas Chehardoli Mehdi Khoshneviszadeh Tahmineh AkbarzadehIn this research, synthesis of dihydropyranocarbonitrile compounds based on kojic acid linked to 1,2,3-triazole ring were performed by click chemistry method and evaluated as tyrosinase enzyme. Ring formation of triazole in the target compounds was performed by the clas MoreIn this research, synthesis of dihydropyranocarbonitrile compounds based on kojic acid linked to 1,2,3-triazole ring were performed by click chemistry method and evaluated as tyrosinase enzyme. Ring formation of triazole in the target compounds was performed by the classic Sharpless approach and in the presence of copper as catalyst. The compounds included three categories including kojic acid derivatives with 1,2,3-triazole ring based on 4-hydroxybenzaldehyde, 3-hydroxybenzaldehyde, and 4-hydroxy-3-methoxy benzaldehyde (vanillin). In vitro evaluation of the tyrosinase enzyme inhibitory effect of all compounds was performed. Most of the compounds showed moderate to weak inhibition and finally, the results were reported as inhibition percentage. Among them 8d, 8f, and 8n compounds have the best percentage of tyrosinase enzyme inhibitory activity with percentages of 40.40 ± 2.88, 45.53 ± 3.05, and 42.52 ± 2.05, respectively, compared to kojic acid as standard control (19.69 ± 2.11 μM). Docking studies showed that the compounds interacted with the amino acids of the entry of active site and its around. In addition, the drug-likeness and pharmacokinetic properties for the selected compounds were calculated and the obtained data were within the acceptable range. Manuscript profile -
Open Access Article
7 - Synthesis and characterization of Fe-Doped hydroxyapatite by in-situ method for use in bone tissue engineering: scaffold application, Biocompatibility and degradation studies
Maryam Maskanati hamidreza Aghabozorg Masoumeh meskinfam Fereshteh MotieiIn the present study, calcium hydroxyapatite-Fe (Fe-HAp) nanocrystalline powder was prepared from a combination of iron ions, calcium nitrate and phosphorus pentoxide by in-situ method. The properties and structure of the synthesized nanocomposite were investigated usin MoreIn the present study, calcium hydroxyapatite-Fe (Fe-HAp) nanocrystalline powder was prepared from a combination of iron ions, calcium nitrate and phosphorus pentoxide by in-situ method. The properties and structure of the synthesized nanocomposite were investigated using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), vibrating sample magnetometry (VSM), and scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS). The obtained results confirmed that the produced powder was hydroxyapatite-iron. The morphological properties of the scaffolds also confirmed that Fe-HAp particles distributed properly in the porous structure of chitosan (CS). The obtained samples were subjected to MTT in vitro test in terms of toxicity against fibroblast cells and also for quantitative evaluation of live cells attached and grown on the scaffolds. Therefore, according to the obtained results, this scaffold can be a suitable candidate for bone tissue reconstruction applications. Manuscript profile -
Open Access Article
8 - Synthesis of graphitic silicon carbide (g-SiC) from gelatin and silica foam for photocatalytic removal of organic and biological pollutants in water
maryam afsharpour aref rostamiIn this research, porous graphitic silicon carbide (g-SiC) doped with nitrogen was synthesized as a metal-free photocatalyst by using silica foam as a silicon source and gelatin as a carbon source. The photocatalytic property of this compound was evaluated in the photoc MoreIn this research, porous graphitic silicon carbide (g-SiC) doped with nitrogen was synthesized as a metal-free photocatalyst by using silica foam as a silicon source and gelatin as a carbon source. The photocatalytic property of this compound was evaluated in the photocatalytic removal of azo dyes and gram positive and negative bacteria in visible light. The g-SiC showed a very high potential to remove organic pollutants (99 % in 10 minutes) compared to commercial SiC (8 % in 10 minutes). This enhancement in photocatalytic performance is related to the graphenic structure of this compound, which increases electron transfers and reduces the rate of recombination. Also, the oxygen molecules which dissolved in water can adsorbed on positive charged Si atoms in g-SiC structure and produce oxygenated radicals. These radicals can accelerate photocatalytic reactions as an active species. On the other hand, the use of silica foam increases the surface area, and with the nitrogen doping from the gelatin source, more structural defects, higher absorption, and a smaller band gap are created in the structure, which increases the photocatalytic activity. The obtained results show that this compound can remove azo dyes up to 100% and bacteria up to 80%. Manuscript profile -
Open Access Article
9 - Optimization of electrofenton process in removal of lead and phenanthrene resistant to biodegradation from contaminated soils using response surface method
maloos tabatabaee Roya Mafi Gholami mehdi borghei ali esrafilyThis study was performed to use the electrofenton process as an electrochemical oxidation process to remove lead and phenanthrene from soils around the oil refinery in south of Tehran. The reactor used (designed by SolidWorks software) was a discontinuous type with a us MoreThis study was performed to use the electrofenton process as an electrochemical oxidation process to remove lead and phenanthrene from soils around the oil refinery in south of Tehran. The reactor used (designed by SolidWorks software) was a discontinuous type with a useful volume of 500 ml and a graphene electrode as a cathode and an iron electrode as an anode (source of divalent iron ion production). The experiment was designed using the response surface methodology (RSM). Variable parameters were pH of the solution (2, 4, 6, 8 and 10), time of the reaction (12.5, 25.0, 37.5, 50.0 and 62.5 minutes), concentration of hydrogen peroxide (0.5, 1.0, 1.5, 2.0 and 2.5 %w/w), and direct electrical current (0.75, 1.50, 2.25, 3.00 and 3.75 A). The highest percentage of lead removal, 85.4%, obtained at pH of 8, H2O2 concentration of 2 %w/w, direct electrical current of 1.5 A, and time of 50 minutes. Also, the highest percentage of phenanthrene removal, 85.95%, obtained at pH of 6, H2O2 concentration of 1.5 %w/w, direct electrical current of 2.25 A, and the time of 37.5 minutes. The obtained results showed that the electrofenton process was able to remove lead and phenanthrene from the soil around the oil refinery. Manuscript profile
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