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Open Access Article
1 - Sol-gel Synthesis and Characterization of Zinc Oxide Nanoparticles Using Black Tea Extract
Saeid Taghavi Fardood Ali Ramazani Sang Woo JooThe use of plant extract is generating the interest of researchers toward cost effective,nontoxic, economic viability and eco-friendly green synthesis of nanoparticles. In the presentwork, zinc oxide (ZnO) nanoparticles were synthesized using black tea extract and zinc MoreThe use of plant extract is generating the interest of researchers toward cost effective,nontoxic, economic viability and eco-friendly green synthesis of nanoparticles. In the presentwork, zinc oxide (ZnO) nanoparticles were synthesized using black tea extract and zinc nitrateas the zinc source by the sol-gel method. The synthesized ZnO nanoparticles werecharacterized by powder X-ray diffraction (XRD), UV-visible spectroscopy and FourierTransform Infrared Spectroscopy (FTIR). The average crystallite size of ZnO nanoparticleswas calculated using Scherrer formula. The X-ray powder diffraction (XRD) analysisrevealed the formation of wurtzite hexagonal phase ZnO with average particle size of 32 nm. Manuscript profile -
Open Access Article
2 - Application of Acidic Ionic Liquid as a Solvent/Catalyst for Preparation of α-Oximinoketones from β-Dicarbonyl Compounds
Ashraf S. Shahvelayati Khadijeh Yadollahzadeh Fatemeh SameniThe selective nitrosation of β-dicarbonyl compounds with sodium nitrite was carried out under1-methyl-3-carboxymethylimidazolium chloride, prepared from N-methylimidazole andchloroacetic acid, as an acidic ionic liquid. The reaction was found to proceed under relat MoreThe selective nitrosation of β-dicarbonyl compounds with sodium nitrite was carried out under1-methyl-3-carboxymethylimidazolium chloride, prepared from N-methylimidazole andchloroacetic acid, as an acidic ionic liquid. The reaction was found to proceed under relativelymild conditions with excellent conversion and selectivity. The ionic liquid was recycled andreused. Manuscript profile -
Open Access Article
3 - Nano SnCl2-SiO2 Catalyzed Facile Synthesis of Aryloylamido Coumarins Derivatives
Hossein Anaraki-ArdakaniA highly efficient and general method for the synthesis of aryloylamido coumarinsderivatives by a three-component condensation of 4-hydroxycoumarin or 4-hydroxy-6-methylpyran-1-one, aryl glyoxals and benzamide in the presence of nano silica supported tin(II) chloride as MoreA highly efficient and general method for the synthesis of aryloylamido coumarinsderivatives by a three-component condensation of 4-hydroxycoumarin or 4-hydroxy-6-methylpyran-1-one, aryl glyoxals and benzamide in the presence of nano silica supported tin(II) chloride as a heterogeneous catalyst is established. In this method, SnCl2/nano SiO2 wasused as green and reusable catalyst. Excellent yields, short reaction times, simple workup,and inexpensiveness and commercially availability of the catalyst are the advantages of thismethod. Manuscript profile -
Open Access Article
4 - Tannic acid: A Green Catalyst for the Eco-friendly Synthesis of 2,3-dihydroquinazolin-4(1H)-ones under Solvent Free Conditions
Mahdim Narouei Nourallah Hazeri Ebrahim Molashahi Sara Zhaleh Maryam FatahpourA new, facile, cost effective, and eco-friendly protocol is reported for the synthesis of 2,3-dihydroquinazoline-4-(1H)-ones exploring tannic acid as a novel, inexpensive, andbiodegradable catalyst. A variety of dihydroquinazolins were prepared from aromatic aldehydesan MoreA new, facile, cost effective, and eco-friendly protocol is reported for the synthesis of 2,3-dihydroquinazoline-4-(1H)-ones exploring tannic acid as a novel, inexpensive, andbiodegradable catalyst. A variety of dihydroquinazolins were prepared from aromatic aldehydesand anthranilamide using catalytic amount of tannic acid under solvent free conditions.Operational simplicity, high yield, and high atom-economy are the important features of thisprotocol. Manuscript profile -
Open Access Article
5 - Synthesis of Magnetic Iron-Oxide Nanofiber Composite using Electrospinning: An Absorbent for Removal of Nitrate from Aqueous Solution
Elham Ezzatzadeh Masoumeh Meskinfam Langroudi Farhad Jokari SheshdehThis project is aimed at preparation of nano filters using recycled foam of food containersenriched by magnetic nanoparticles, for nitrate removal from water. The characterization ofthis electrospun magnetic nanofiber depicted a high capacity for nitrate adsorption. The MoreThis project is aimed at preparation of nano filters using recycled foam of food containersenriched by magnetic nanoparticles, for nitrate removal from water. The characterization ofthis electrospun magnetic nanofiber depicted a high capacity for nitrate adsorption. TheScanning Electron Microscopy (SEM), X-Ray powder Diffraction (XRD), Energy DispersiveSpectrometry (EDAX) and Inductively Coupled Plasma (ICP) had been applied for thissurvey. In addition, magnetic behavior of nanoparticles was evaluated by magnetizationmeasurements. The functionality of designing filter against affecting parameters along withthe relation of these parameters with each other on the removal efficiency of nitrate wasevaluated. It is concluded from the results that the height of the nano filter and the amount ofmagnetic nanoparticles has the most significant effect on the nitrate removal from wateramong all other factors. Therefore, optimization techniques can assist to achieve highestefficiency. Manuscript profile -
Open Access Article
6 - Binuclear Complex of Zinc and Copper with Unsymmetrical Macrocyclic Ligand as Sensitizer in Nanocrystaline TiO2 Solar Cells
Malihe Khalili Mohammad Abedi Davood Sadeghi Fateh Kobra RazmiDye sensitized solar cells (DSSCs) are considered as one of the most promising alternativerenewable energy sources. In the structure of DSSCs, a photosensitizer composed of transitionmetal complexes is used to harvest light. In this work a binuclear complex containing t MoreDye sensitized solar cells (DSSCs) are considered as one of the most promising alternativerenewable energy sources. In the structure of DSSCs, a photosensitizer composed of transitionmetal complexes is used to harvest light. In this work a binuclear complex containing twopropionitrile pendant arms [ZnLCu(OAC)]PF6 {L = 1, 6- bis (2-cyanoethyl) -2, 5-bis (2-hydroxy3-formyl-5-methylbenzyl)-2, 5- diazahexane} has been examined as a non-planar metal basedphotosensitizer in the fabrication of dye sensitized solar cell. The photovoltaic performance ofthe fabricated cell was evaluated and photovoltaic parameters were determined. The resultsshowed the conversion efficiency of 0.17%, current density of (Jsc) 0.69 mAcm-2, voltage (Voc)0.38 v and fill factor (FF) of 0.69 under sun (Am1.5) for the cells. Electrochemical impedancespectroscopy (EIS) and cyclic voltammetry (CV) were employed to study the electron transfermechanism in fabricated cells. The results showed that the potential in cathodic current was morepositive indicating that the conduction band position of TiO2 had shifted to positive energiesconfirming less Voc of the fabricated cell. Manuscript profile -
Open Access Article
7 - Effect of Clay Network Formation on Flame Retardancy of Polyethylene terephthalate/montmorillonite Nanocomposites
Sima Habibi Monasadat SaketConsidering the importance of determining potential hazards and factors that can cause anunexpected fire and due to the important role of nanotechnology to achieve more effectiveproperties, this paper presents our experiments on preparing nanocomposites based onPoly(eth MoreConsidering the importance of determining potential hazards and factors that can cause anunexpected fire and due to the important role of nanotechnology to achieve more effectiveproperties, this paper presents our experiments on preparing nanocomposites based onPoly(ethylene terephthalate)(PET) and montmorillonite (MMT) as organoclay via meltblending with different clay loadings to investigate their combustion behavior. The mainobjective of this work was employing cone calorimeter as a perfect device to investigate allcombustion parameters such as time to ignition (TTI), heat release rate (HRR), mass lossrate(MLR), CO and CO2 release and peak of heat release rate (pHRR). Thermogravimetricanalysis (TGA), Cone calorimeter, limiting oxygen index (LOI) were employed to measurethermal stability and flammability of nanocomposite samples. Morphology and rheology ofclay /PET nanocomposites also were investigated using X-ray diffraction (XRD) andTransmission electron microscopy (TEM).The relationship between decrease of intrinsicviscosity and thermal behavior of sample also was studied. Results indicate that clay networkwas formed in nanocomposites samples which strongly affected flammability of burningsamples and resulted more residue during combustion which leads to decrease in dripping ofPET during melting. Manuscript profile -
Open Access Article
8 - Removal of Mercury using Dibutyl-Disulfide Montmorillonite: Characterization of Adsorbent, Optimization, Isotherm, Kinetic and Real Samples Study
Hadi Moghaddam Shahla ElhamiDibutyl-Disulfide Montmorillonite (DD-MMT) was synthesized successfully and found to bean excellent adsorbent for Hg(II) removal. The fourier transform infrared spectroscopy (FTIR),x-ray diffraction spectrum (XRD) and scanning electron microscopy (SEM) were used tochara MoreDibutyl-Disulfide Montmorillonite (DD-MMT) was synthesized successfully and found to bean excellent adsorbent for Hg(II) removal. The fourier transform infrared spectroscopy (FTIR),x-ray diffraction spectrum (XRD) and scanning electron microscopy (SEM) were used tocharacterize properties of the absorbent. The effects of several parameters such as solutionpH, adsorbent dose, contact time and the initial concentration on the Hg(II) adsorption ontothe composite were investigated. DD-MMT had a high capacity for Hg(II) removal thatremoved Hg(II) (10-100 mg/L) more than 95 % with 2 g/L of adsorbent in only 10 min. Theadsorption equilibrium data fitted well to Langmuir isotherm. The maximum adsorptioncapacity of Hg(II) ions was 312.5 mg/g that was bigger than most of previous methods.Adsorption kinetics of Hg (II) on DD-MMT followed the pseudo-second-order kinetic model.In addition, the method has the advantages of environmental friendly, rapidity, simplicity,and low cost for Hg(II) removal. Manuscript profile
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