Journal of the Iranian Chemical Research: 5 (4)

Open Access Article

1 - Degradation of some dyes using nanosized CeCuO3 photocatalyst: synthesis and characterization
Indu Bhati Anil Kumar Suresh C. Ameta

CeCuO3 nanoparticles with diameter 4.36 nm was synthesized by a fast and simplemicrowave method using cerric sulphate tetra hydrate and copper sulphate pentahydrate asstarting reagents. CeCuO3 was synthesized under microwave heating for 6 min without calciningsteps. The More

CeCuO3 nanoparticles with diameter 4.36 nm was synthesized by a fast and simplemicrowave method using cerric sulphate tetra hydrate and copper sulphate pentahydrate asstarting reagents. CeCuO3 was synthesized under microwave heating for 6 min without calciningsteps. The synthesized products were characterized by X-ray powder diffraction (XRD) andscanning electron microscopy (SEM) and the photocatalytic behaviour of nanosized CeCuO3 wasalso studied spectrophotometrically through decolorization of yellowish orange and fast greendyes, a prompt water pollutant from textile industries. The effect of variation of differentparameters i.e. pH, amount of CeCuO3, concentration of dye and light intensity was observed onthe rate of photocatalytic bleaching. A Tentative mechanism for the photocatalytic bleaching ofdyes has been proposed. Manuscript profile

Open Access Article

2 - Kinetic and thermodynamic studies of the removal of murexide from aqueous solutions on to activated carbon
Ardeshir Shokrollahi Mehrourang Ghaedi Mojdeh Ranjbar Ameneh Alizadeh

The objective of this study was to assess the adsorption potential of activated carbon (AC) asan adsorbent for the removal of Murexide (Mu) from aqueous solutions. The influence of variablesparameters including pH, amount of adsorbent, sieve size of adsorbent, temperatu More

The objective of this study was to assess the adsorption potential of activated carbon (AC) asan adsorbent for the removal of Murexide (Mu) from aqueous solutions. The influence of variablesparameters including pH, amount of adsorbent, sieve size of adsorbent, temperature and contact timeon Mu removal was studied. Following optimization of variables, the relation between concentrations ofdye remained in aqueous and adsorbent has been evaluated using various adsorption isotherm modelslike, Langmuir, Freundlich, Tempkin, Harkins-Jura and Dubinin–Radushkevich. Thermodynamicparameters such as enthalpy (ΔH◦), and, entropy (ΔS◦), activation energy (Ea), stickingprobability (S*), and Gibb’s free energy changes (ΔG◦) were also calculated. It was found fromevaluated different thermodynamic parameters, viz., ΔH◦, ΔS◦ and ΔG◦ that the adsorption of Muby AC was feasible, spontaneous and endothermic process. The kinetic studies suggest that the allprocess following pseudo second order kinetics and involvement of intera- particle diffusion mechanism.The results indicated that the intraparticle diffusion also is the rate limiting factor. Manuscript profile

Open Access Article

3 - The synthesis of some organotin (IV) compounds in the melt- phase
Uche B. Eke Temitope O. Abodunrin Samson O. Owalude

The melt-phase synthesis of dioctyltin (IV) and triphenyltin (IV) benzoates were carried outusing stoichiometric amounts of benzoic acids and the corresponding organotin (IV) compounds.The reagents were ground together in a mortar and fed into a boiling glass tube. A ca More

The melt-phase synthesis of dioctyltin (IV) and triphenyltin (IV) benzoates were carried outusing stoichiometric amounts of benzoic acids and the corresponding organotin (IV) compounds.The reagents were ground together in a mortar and fed into a boiling glass tube. A cannula tubewas inserted into the boiling tube to discharge accumulated gaseous products. A syringe ensureda continuous flow of dry Nitrogen gas in the reaction vessel. The compounds are known usingwet Chemistry. Their syntheses via the melt-phase were in good yields. The physical propertiescorresponded to those of the similar compounds prepared by wet chemistry. The IR, 1H and 13CNMR data indicate that coordination to the tin atom is via carboxylate group. Manuscript profile

Open Access Article

4 - Volumetric properties of {n-butyl acetate + 1-butanol + 1,2- butanediol} at temperature between [298.15 ,303.15 and 308.15] K.
Saleh Bagheri Mahdi Rakhshi Mahdi Rezaei Sameti

Densities and excess molar volume of the binary and ternary mixtures formed by nbutylacetate+ 1-butanol + 1,2-butanediol were measured at (298.15, 303.15, and 308.15) K forthe liquid region and at ambient pressure (81.5) k Pa , for the whole composition range. Theexcess More

Densities and excess molar volume of the binary and ternary mixtures formed by nbutylacetate+ 1-butanol + 1,2-butanediol were measured at (298.15, 303.15, and 308.15) K forthe liquid region and at ambient pressure (81.5) k Pa , for the whole composition range. Theexcess molar volumes,VmE and excess partial molar volume ViE ,were calculated fromexperimental densities.The excess molar volumes are positive over the mole fraction rage forbinary mixtures of n-butylacetate (1) + 1-butanol (2) and n-butylacetate (2) + 1,2-butanediol (3)and increase with increasing temperatures from (298.15 to 308.15)K. The excess molar volumesof 1-butanol (1) + 1,2-butanediol (3) are negative and decrease with increasing temperaturesfrom (298.15 to 308.15)K..The experimental data of constitute were correlated as a function ofthe mole fraction by using the Redlich–Kister equation for binary and , Cibulka, Jasinski andMalanowski , Singe et al, Pintos et al , Calvo et al, Kohler, and Jacob - Fitzner for ternarymixture ,respectively. The experimental data of the constitute binaries are analyzed to discuss thenature and strength of intermolecular interactions in these mixtures. Manuscript profile

Open Access Article

5 - A two-dimensional numerical model of a planar solid oxide fuel cell
Norouz Mohammad Nouri Amin Mirahmadi Majid Kamvar

A two-dimensional CFD model of a planar solid oxide fuel cell (SOFC) has been developed.This model can predict the performance of SOFC at various operating and design conditions.The effect of Knudsen diffusion is accounted in the porous electrode (backing) and reaction More

A two-dimensional CFD model of a planar solid oxide fuel cell (SOFC) has been developed.This model can predict the performance of SOFC at various operating and design conditions.The effect of Knudsen diffusion is accounted in the porous electrode (backing) and reaction zonelayers. The mathematical model solves conservation of electrons and ions and conservation ofspecies. The model is formulated in COMSOL Multiphysics 3.4, a commercial Finite ElementMethod (FEM) based on software package. The objective of the present study is to compare theresults obtained from FEM with Control Volume Method (CVM) results obtained by Hussain etal. Both sets of results are compared with the experimental data published in literature. Theresults obtained by FEM show more accurate agreement with the experimental data. Finaly, theeffect of various operating and design parameters on the performance of SOFC has beenexamined. Manuscript profile

Open Access Article

6 - Determination of trace amounts of lead by adsorptive cathodic stripping voltammetry in the presence of xylenol orange
Ali Niazi Roya Tajik Samira Kamel Foladi

Lead forms the complexes with xylenol orange in the basic solution. An adsorptivedifferential pulse stripping method for the determination of lead is proposed. The procedureinvolves an adsorptive accumulation of lead on a hanging mercury drop electrode (HMDE) inthe pres More

Lead forms the complexes with xylenol orange in the basic solution. An adsorptivedifferential pulse stripping method for the determination of lead is proposed. The procedureinvolves an adsorptive accumulation of lead on a hanging mercury drop electrode (HMDE) inthe presence of xylenol orange, followed by reduction of adsorbed lead by voltammetric scanusing differential pulse modulation. The optimum experimental conditions are: xylenol orangeconcentration of 0.20 μg mL-1, pH 10.5, accumulation potential of -900 mV versus Ag/AgCl,accumulation time of 200 s, scan rate of 10 mV s-1 and pulse height of 100 mV. The peak currentis proportional to the concentration of lead over range of 0.03-0.65 μg mL-1, and the detectionlimit is 0.01 μg mL-1. The relative standard deviations (n=3) for 0.10 μg mL-1 lead is 0.86%,respectively. The proposed method was applied to the determination of lead in hair and watersamples with satisfactory results. Manuscript profile

Open Access Article

7 - Dispersive liquid–liquid microextraction based on solidification of floating organic drop combined with flame atomic absorption spectrometry for determination trace amount of cobalt in water samples
Majid Ramezani Sara Rahmani

An efficient, rapid, simple, and highly selective dispersive liquid–liquid microextraction basedon solidification of floating organic drop (DLLME-SFOD), combined with flame atomicabsorption spectrometry was developed for preconcentration and determination of trace More

An efficient, rapid, simple, and highly selective dispersive liquid–liquid microextraction basedon solidification of floating organic drop (DLLME-SFOD), combined with flame atomicabsorption spectrometry was developed for preconcentration and determination of trace amountsof cobalt in water samples. In this method, an appropriate mixture of acetone and1-undecanol was injected rapidly into the aqueous sample containing cobalt-2N1N complex, as aresult cloudy mixture was formed. After centrifugation, the test tube was cooled for 5 min. Thesolidified 1-undecanol on top of the solution was transferred into a suitable vial. Then, it wasdissolved in 100 μL of methanol and finally introduced into the flame atomic absorption bymicrosampler injector. Several factors influencing the microextraction efficiency, such as thenature and volume of organic solvent, pH of aqueous solution, amount of complexing agent,stirring rate and extraction time were investigated and optimized. Under the optimum conditions,the enhancement factor was 68. The limit of detection, 6 μgL−1 and relative standard deviation(RSD) 2.64% (n=8) were obtained. The proposed method was applied to the analysis of variouswater samples. Manuscript profile

Open Access Article

8 - Kinetic study of unsaturated ketones epoxidation with hydrogen peroxide through the inverse phase transfer catalysis and effect of ultrasonic waves in this epoxidation
Mohammad Taghi Taghizadeh Tahere Shaidaii Narges Sabouri

Kinetic study of epoxidation of unsaturated ketone of mesityl oxide was studied by usingHydrogen peroxide in the presence of dodecyltrimethyl ammonium bromide (DTAB) as aninverse phase transfer catalyst. The reaction was carried out in the two-phase media of waterheptan More

Kinetic study of epoxidation of unsaturated ketone of mesityl oxide was studied by usingHydrogen peroxide in the presence of dodecyltrimethyl ammonium bromide (DTAB) as aninverse phase transfer catalyst. The reaction was carried out in the two-phase media of waterheptanewith 1:1 ratio in 25 °C. It was found that the order of reaction for mesityl oxide forketone concentration in the range of 0.03- 0.1 mol L-1 are 0.8906. And also with regard tocatalyst concentrations in the range of 0.07- 0.2 mol L-1, the order of reaction for catalyst is0.1205. The order of reaction of Hydrogen peroxide in the range o of 1.5-4 mol L-1 concentrationfor mesityl oxide is –0.1411. The activation energy of the reaction is 27.51 kJ mol-1 in therestricted temperature between 10-25 °C and it was observed that reaction rate enhances bytemperature increase. As the phase transfer catalyst depends strongly on mass transfer betweentwo phases, it is well understood that ultrasonic waves have a greater efficiency of interfacemixing than conventional agitation. So, in this research the effect of ultrasonic waves incomparison with magnetic stirrer was studied. The results showed that an ultrasonic waveaccelerates on the reaction. Manuscript profile

XML

List of Articles