Journal of Applied Chemical Research: 5 (0)

Open Access Article

1 - Using Ghezeljeh Nanoclay for Measuring of Copper Ions Released from the Cooking Pot into Food Samples by FAAS and ICP-AES
Majid Soleimani Zahra Hassanzadeh Siahpoosh

Ghezeljeh montmorillonite nanoclay was used as a natural adsorbent to measure and remove copper ions released from the cooking pot into food by applying the solid phase extraction (SPE) method in batch mode. The clay is characterized by using fourier transform infrar More

Ghezeljeh montmorillonite nanoclay was used as a natural adsorbent to measure and remove copper ions released from the cooking pot into food by applying the solid phase extraction (SPE) method in batch mode. The clay is characterized by using fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results of XRD and FT-IR of nanoclay confirm that montmorillonite is the dominant mineral phase. Based on SEM images of clay, it can be seen that the distance between the plates is Nano. The adsorbent was prepared using the Galehouse method and then a number of effective parameters on extraction were optimized using standard solutions: amount of adsorbent, eluent characteristics, pH and type of the buffer solutions, shaking time, adsorption temperature, volume of the standard solutions, and initial metal ion concentration. Also, the role of desorption and centrifugation time were explored. The limit of detection and quantification, preconcentration factor, and the adsorption capacity of the nanoclay were calculated. The method was applied to a variety of food materials to verify its efficiency. Subsequently, this method was applied to two Iranian stews cooked in copper pots plated with tin in order to measure the amount of copper released from the pot. The result suggests that the amounts of released copper and tin exceeded the tolerable daily intakes. In general, the removal of metal ions using the nanoclay proved to be rapid, efficient, reliable, and reproducible. Manuscript profile

Open Access Article

2 - Asymmetric Synthesis of Modafinil and its Derivatives by using the Functionalized Silica-based Mesoporous MCM-41
Mohammad javad Taghizadeh

Modafinil [2-[(diphenylmethyl)sulfinyl]acetamide] is used clinically in the treatment of narcolepsy and sleeping disorders. The synthesis of modafinil, begins with the reaction of benzhydrol and thioglycolic acid in trifluoroacetic acid to afford benzhydrylsulfinyl ac More

Modafinil [2-[(diphenylmethyl)sulfinyl]acetamide] is used clinically in the treatment of narcolepsy and sleeping disorders. The synthesis of modafinil, begins with the reaction of benzhydrol and thioglycolic acid in trifluoroacetic acid to afford benzhydrylsulfinyl acetic acid. The reaction of acid with thionyl chloride in benzene followed by treatment with ammonium hydroxide gave acetamide. Synthesis of novel heterogeneous chiral catalyst by a simple and efficient method has been reported. The first, a new derivative of chiral ligand (containing amine group) in 6 steps from a cheap and readily available substrate (4-aminobenzoic acid) were synthesized in good yield. Then, this chiral ligand immobilized on silica-based mesoporous MCM-41 through its amine group. The obtained catalysts were characterized with FT-IR, XRD, BET, SEM, IR, 1H NMR,13C NMR and mass spectral and used for the first time in oxidation of benzhydrylsulfinyl acetic acid and its derivatives. The reaction using this catalysts exhibits very good yield. Manuscript profile

Open Access Article

3 - Aging Study of Transformer Oil-Impregnated Repulped and Standard Cellulose by Measuring of 2-furfural Content of the Oil
Ali Ramazani Rana Rahmati Solmaz Bigdeli Sohrab Rahmani Mehrdad Hamidi

In order to evaluate the reliability of using repulped cellulose in transformers, the aging process was applied on standard and repulped cellulose in a laboratory accelerated model by increasing of temperature to 150 ° C and their behavior was monitored by measuri More

In order to evaluate the reliability of using repulped cellulose in transformers, the aging process was applied on standard and repulped cellulose in a laboratory accelerated model by increasing of temperature to 150 ° C and their behavior was monitored by measuring the amount of 2-furfural released in oil by HPLC (High Performance Liquid Chromatography) in the consecutive aging periods and the results was compared. The results were fitted to estimate the aging behaviors according to the content of 2 - furfural that released in oil. The obtained results showed that behavior of two types of cellulose is almost the same. Therefore, it can be concluded that the moulded insulating parts made of repulped cellulose can be used in the insulation system of power transformers with a good and acceptable reliability. Manuscript profile

Open Access Article

4 - Synthesis of Chromium Oxide Nano Particles by Thermal Decomposition Method
Bagher-Aziz kalantari Mohamad Reza Talei Bavil Olyai

Disclosed is a method of preparing pigmentary chromium oxide nano particles having 50 percent particle size less than about 100 nm. Preparation of nano chromium (III) oxide is investigated by thermal decomposition method. According to the disclosed method, a substant More

Disclosed is a method of preparing pigmentary chromium oxide nano particles having 50 percent particle size less than about 100 nm. Preparation of nano chromium (III) oxide is investigated by thermal decomposition method. According to the disclosed method, a substantially dry solid composition of potassium dichromate and carbon active is heated in CO2atmosphere to a temperature of about 600ºC for 1hour. Thereafter, the solid Cr2O3product was washed twice with distilled water. Manuscript profile

Open Access Article

5 - Removal of Crude Oil from Oily Artificial Wastewater by Using Pulse Electrochemical Treatment
Azin Karkhaneh Elham Keshmirizadeh

In this study electrocoagulation (EC) process with sacrificial aluminum anode was used to separate crude oil from synthetic oily wastewater emulsion. A preliminary experimental study was performed to evaluate the most accurate operating parameters, which are then used More

In this study electrocoagulation (EC) process with sacrificial aluminum anode was used to separate crude oil from synthetic oily wastewater emulsion. A preliminary experimental study was performed to evaluate the most accurate operating parameters, which are then used for the determination of crude oil removal efficiency. The experimental results indicated that electrocoagulation was very efficient andable to achieve 99% turbidity removal in less than 15 min,pH:7, current density: 125(A/m2). Also the effect of initial concentration of crude oil (2-33 g/L) in wastewater, initial volume of wastewater (600-1800 mL), effect of flow rate (5.5-16.25 mL/s) in semi batch reactor, dose of electrolyte and type of electrolyte were optimized. During the oil removal process, polarization were occurred around anode, for omitting this problem two types of current were studied as follows: “direct current (DC)” and “pulse current (PC)” however the energy consumption were 0.012 and 0.0042 kWh/m3 respectively Manuscript profile

Open Access Article

6 - Separation and Recovery of Platinum by Magnetic Core-shell Nano-structures Modified with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane
Mansoor Anbia Ruholla Mehrizi

In this paper, Fe 3 O 4 @SiO 2 core/shell magnetic nanostructure has been synthesized and modified by N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS). Fe 3 O 4 @SiO 2 was used as a novel adsorbent for separation of hexachloroplatinic acid.X-ray dif More

In this paper, Fe 3 O 4 @SiO 2 core/shell magnetic nanostructure has been synthesized and modified by N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS). Fe 3 O 4 @SiO 2 was used as a novel adsorbent for separation of hexachloroplatinic acid.X-ray diffraction (XRD), scanning electron microscopy (SEM), and FT-IR technique were used to characterize morphologies and surface texturing of this adsorbents. The effective factors on adsorption, such as pH, contact time; salt effect and temperature were studied systematically. The optimal conditions of Platinum adsorption were obtained at temperature of about 25oC, pH about 2.5 and the equilibrium time of 30-40 minutes. The maximum adsorption capacity (qmax) in the optimal conditions was equal to 74mg/g. The magnetic separation of the absorbent was achieved by a magnet and finally the absorbent was compared with other absorbents. Inductive coupled plasma optical emission spectrometer (ICP-OES) was used for determination of metal ion concentrations in the aqueous solution Manuscript profile

Open Access Article

7 - H6P2W18O62: A Green and Reusable Catalyst for the One-pot Three-Component Synthesis of Spirooxindoles in Water
Zahra Lasemi Ebrahim Mehrasbi

Wells–Dawson tungsten heteropolyacid (H6P2W18O62) has been applied as an effective heterogeneous catalyst for one-pot synthesis of spiro[4H-pyran-3,3’-oxindoles] via reaction of various isatins, malonitrile and 1,3-dicarbonyl compound in water. The corresp More

Wells–Dawson tungsten heteropolyacid (H6P2W18O62) has been applied as an effective heterogeneous catalyst for one-pot synthesis of spiro[4H-pyran-3,3’-oxindoles] via reaction of various isatins, malonitrile and 1,3-dicarbonyl compound in water. The corresponding products were obtained in high yields. The catalysts were easily recycled and reused without loss of their catalytic activity. Manuscript profile

Open Access Article

8 - Electrochemical Investigation of Coconut Oil as Green Corrosion Inhibitor for ST37 Carbon Steel Protection
Mohammad Hossein Ghorbani Arash Ghoorchian Hamideh Kalhor

The corrosion inhibition of ST37 Carbon Steel in 1.0 M HCl by aquatic extract of coconut has been studied as a possible source of green inhibitor using the potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The aquatic extract of cocon More

The corrosion inhibition of ST37 Carbon Steel in 1.0 M HCl by aquatic extract of coconut has been studied as a possible source of green inhibitor using the potentiodynamic polarization and electrochemical impedance spectroscopy techniques. The aquatic extract of coconut have many advantages over classical techniques of sample preparation of plant gums (such as drying and solvent reflux).Polarization measurements showed that the extracts act as mixed typed inhibitor but under cathodic control. The passivation layer formed on metal surface, and then inhibits the anodic dissolution of steel. The compounds that available in coconut oil provides a good protection to steel against corrosion by shifting the potential at the noble direction. The Nyquist plots showed that on increasing CW concentration, increases charge transfer resistance and decreases double layer capacitance. The Results obtained from Tafel extrapolation and EIS techniques were in good agreement. SEM studies also help to understand the changes that take place on the surfacelayer with respect to change in CW concentration. Manuscript profile

Open Access Article

9 - Voltammetric Investigation of Thioridazine Using a Carbon Nanocomposite Electrode in Human Biological Samples
Elham Eslami Fatemeh Farjami

An electrochemical method employing a carbon nanocomposite electrode was developed to measure thioridazine. The electrode has been designed by incorporation of montmorillonite nanoclay into the carbon ionic liquid electrode. Surface morphology of the electrodes was d More

An electrochemical method employing a carbon nanocomposite electrode was developed to measure thioridazine. The electrode has been designed by incorporation of montmorillonite nanoclay into the carbon ionic liquid electrode. Surface morphology of the electrodes was done using scanning electron microscopy. Adsorptive stripping voltammetry was applied as a very sensitive analytical method for the determination of sub-micromolar amounts of thioridazine. The optimized linear working range and detection limit (S/N=3) are 0.1-50 μM and 21nM, respectively. The nanocomposite electrode demonstrates several advantages such as simple preparation method, excellent activity in physiological conditions, low detection limit, long-term stability, and remarkable voltammetric reproducibility. As a result, it can find promising applications in blood serum and urine samples. Manuscript profile

Open Access Article

10 - Evaluation of the Effect of Ni-Co NPs for the Effective Growth of Carbon Nanotubes by TCVD System
Sepideh Sadat Madani Karim Zare Mahmood Ghoranneviss

A systematic study was conducted to understand the influences of catalyst combination as Ni-Co NPs on carbon nanotubes (CNTs) grown by Chemical Vapor Deposition (TCVD). The DC-sputtering system was used to prepare Co and Ni-Co thin films on silicon substrate. Ni- Co More

A systematic study was conducted to understand the influences of catalyst combination as Ni-Co NPs on carbon nanotubes (CNTs) grown by Chemical Vapor Deposition (TCVD). The DC-sputtering system was used to prepare Co and Ni-Co thin films on silicon substrate. Ni- Co nanoparticles were used as metal catalyst for growing carbon nanotubes from acetylene (C2H2) gas in 850 ̊ C during 15 min. Carbon nanotubes grown on Co and Ni-Co deposited on Si substrates was characterized by Field Emission Scanning Electron Microscopy (FESEM) and Raman spectroscopy. Energy Dispersive X-ray (EDX) measurements were used to investigate the elemental composition of the nickel and cobalt nanocatalysts deposited on Si substrates. Atomic Force Microscopy (AFM) was used to characterize the surface morphology of the nanocatalysts. It was found that by the addition of Ni NPs thin layer on Si substrate for Co NPs catalyst, density of the grown CNTs is much decreased in comparison to Co NPs on Si substrate. Manuscript profile

Open Access Article

11 - The Influence of Ag Doping on Structural, Optical Properties and Photocatalytic Activity of TiO2/SiO2 Nanocomposite
Bahar Khodadadi

In the present study, TiO 2 /SiO 2 and TiO 2 /SiO 2 /Ag nanocomposite powders were synthesized by sol-gel technique. Moreover, for investigation of the Ag doping effect different concentrations of dopant were added. Structures were characterized by IR spectros More

In the present study, TiO 2 /SiO 2 and TiO 2 /SiO 2 /Ag nanocomposite powders were synthesized by sol-gel technique. Moreover, for investigation of the Ag doping effect different concentrations of dopant were added. Structures were characterized by IR spectroscopy, Scanning Electron Microscopy (SEM), Energy Dispersive Analytical X-Ray (EDAX), and X-Ray Diffraction (XRD) methods. Furthermore, the absorption coefficients of the samples were analyzed by Tauc’s model and the direct band gaps were calculated. Photocatalytic activity of all samples was investigated under UV irradiation in an aqueous medium. The results were shown that photocatalytic activity improves in the presence of appropriate amount of Ag as dopant. Manuscript profile

Open Access Article

12 - Electrochemical and Theoretical Studies of Adsorption of 1-H-benzotriazole at Stainless Steel in Hydrochloric acid Solution Interface as Corrosion Inhibitors
Nazanin Behineh Mohammad Hossain Zargazi Hesam Baheri

The influence of the concentration of1-H-benzoteriazolon the corrosion of 316 stainless steel (SS) in chloride acid 1M solutions was studied. The potentiodynamics polarization and scanning electron microscopy (SEM) have been used. The inhibition efficiency increased w More

The influence of the concentration of1-H-benzoteriazolon the corrosion of 316 stainless steel (SS) in chloride acid 1M solutions was studied. The potentiodynamics polarization and scanning electron microscopy (SEM) have been used. The inhibition efficiency increased with an increase in the concentration of1-H-benzoteriazol.The adsorption of1-H-benzoteriazol onto the SS surface occurs according to the Langmuirisotherm. The corrosion kinetic parameters of 316 stainless steel and thermodynamicadsorption parameters for1-H-benzoteriazolwere determined and discussed. Manuscript profile

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