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Hasanzadeh, Mohammad.,Shadjou, Nasrin.,Saghatforoush, Lotfali.,Khalilzadeh, Balal.,Kazeman, Isa. Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.12
Copper-dimethylglyoxime complex (CuDMG) modified Copper electrode (Cu/CuDMG) showed a catalytic activity towards cyclohexanol oxidation in NaOH solution. The modified electrode prepared by the dimethylglyoxime anodic deposition on Cu electrode in the solution contained 0.20 M $NH_4Cl\;+\;NH_4OH\;(pH\;9.50)\;and\;1\;{\times}\;10^{-4}$ M dimethylglyoxime. The modified electrode conditioned by potential recycling in a potential range of -900${\sim}$900 mV vs. Ag/AgCl by cyclic voltammetry in alkaline medium (1 M NaOH). The results show that the CuDMG film on the electrode behaves as an efficient catalyst for the electro-oxidation of cyclohexanol in alkaline medium via Cu (III) species formed on the electrode.
Mohammad. Hasanzadeh,Nasrin. Shadjou,Lotfali. saghatforoush,Balal. Khalilzadeh,Isa. Kazeman 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.12
Copper-dimethylglyoxime complex (CuDMG) modified Copper electrode (Cu/CuDMG) showed a catalytic activity towards cyclohexanol oxidation in NaOH solution. The modified electrode prepared by the dimethylglyoxime anodic deposition on Cu electrode in the solution contained 0.20 M NH4Cl + NH4OH (pH 9.50) and 1 × 10-4 M dimethylglyoxime. The modified electrode conditioned by potential recycling in a potential range of ‒900 ~ 900 mV vs. Ag/AgCl by cyclic voltammetry in alkaline medium (1 M NaOH). The results show that the CuDMG film on the electrode behaves as an efficient catalyst for the electro-oxidation of cyclohexanol in alkaline medium via Cu (III) species formed on the electrode.
A Predictive Controller Based on Dynamic Matrix Control for a Non-minimum Phase Robot Manipulator
Mohammad Ali Badamchizadeh,Shima Eshaghi,Hamed Kharrati,Iraj Hasanzadeh 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.3
In this paper a hybrid control strategy is presented based on Dynamic Matrix Control (DMC) and feedback linearization methods for designing a predictive controller of five bar linkage manipulator as a MIMO system (two inputs and two outputs). Analyzing the internal dynamic of robot shows the open loop system is unstable and non-minimum phase, so in order to apply the predictive controller, special modifications are needed. These modifications on non-minimum phase behavior are performed using feedback linearization procedure based on state space realization. The design objec-tive is to track a desirable set point as well as time varying trajectories as a command references with globally asymptotical stabilization. The proposed controller is applied to nonlinear fully coupled model of the typical five bar linkage manipulator with non-minimum phase behavior. Simulation results show that the proposed controller has good efficiency. The step responses of system with and without feedback linearization process illustrated that the mentioned modification for stabilizing is performed properly. After applying the proposed predictive controller, the joint angle of robot tracks the reference input while another input acts as the disturbance and vice versa.
Synergetic effect of MWCNT/nanoclays on microcellular polystyrene hybrid nanocomposite foams
Hasanzadeh Rezgar,Darvishi Mohammad Mehdi,Azdast Taher 한국탄소학회 2020 Carbon Letters Vol.30 No.4
Synergetic efect of multi-walled carbon nanotubes (MWCNTs)/nanoclays hybrid was investigated on the properties of high�impact polystyrene (HIPS) nanocomposite foams. The glass transition temperature and the cellular structure including the cell size and cell density were studied in details. Adding MWCNT and nanoclay increased the glass transition temperature of HIPS by 8.5 °C and 1.5 °C, respectively. The experimental results indicated that the cell size of HIPS foams was reduced from 84.05 to 60.97 µm and 40.22 µm using MWCNTs and nanoclays, respectively. The synergetic efect of MWCNT/nanoclay was more signifcant by reducing the cell size to 13.69 µm. The cell density was improved from 5.79×104 to 1.77×105 cell/ cm3 using MWCNTs and to 9.39×106 cell/cm3 using nanoclays. The cell density reached to 2.90×107 cell/cm3 using the synergetic efect of MWCNT/nanoclay.
Saghatforoush, Lotfali.,Hasanzadeh, Mohammad.,Karim-Nezhad, Ghasem.,Ershad, Sohrab.,Shadjou, Nasrin.,Khalilzadeh, Balal.,Hajjizadeh, Maryam. Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
Electrocatalytic oxidation of two anti-inflammatory drugs (Mefenamic acid and Indomethacin) was investigated on a cobalt hydroxide modified glassy carbon (CHM-GC) electrode in alkaline solution. The process of oxidation and its kinetics were established by using cyclic voltammetry and chronoamperometry techniques as well as steady state polarization measurements. Voltammetric studies indicated that in the presence of under study drugs, the anodic peak current of low-valence cobalt species increased, followed by a decrease in the corresponding cathodic current. This result indicates that the drugs were oxidized via cobalt hydroxide species immobilized on the electrode surface via an E$\acute{C}$ mechanism. A mechanism based on the electrochemical generation of Co (IV) active sites and their subsequent consumption by the drugs in question was also investigated. The constants rate of the catalytic oxidation of the drugs and the electron-transfer coefficients reported.
Lotfali. Saghatforoush,Mohammad. Hasanzadeh,Ghasem. Karim-Nezhad,Nasrin. Shadjou,Sohrab. Ershad,Nasrin. Shadjou,Balal. Khalilzadeh,Maryam. Hajjizadeh 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.6
Electrocatalytic oxidation of two anti-inflammatory drugs (Mefenamic acid and Indomethacin) was investigated on a cobalt hydroxide modified glassy carbon (CHM-GC) electrode in alkaline solution. The process of oxidation and its kinetics were established by using cyclic voltammetry and chronoamperometry techniques as well as steady state polarization measurements. Voltammetric studies indicated that in the presence of under study drugs, the anodic peak current of low-valence cobalt species increased, followed by a decrease in the corresponding cathodic current. This result indicates that the drugs were oxidized via cobalt hydroxide species immobilized on the electrode surface via an EĆ mechanism. A mechanism based on the electrochemical generation of Co (IV) active sites and their subsequent consumption by the drugs in question was also investigated. The constants rate of the catalytic oxidation of the drugs and the electron-transfer coefficients reported.
Isa Karimzadeh,Mohammad Sabzi,Behrouz Safibonab,Iraj Hasanzadeh,Mojtaba Farhangmehr,Ali Arman 한국고분자학회 2017 폴리머 Vol.41 No.1
This study aimed to investigate the effect of organoclay concentration variation (1-5 wt%) on the weathering resistance of epoxy resin in terms of the strength, modulus and weight changes of the specimens after exposure to accelerated weathering conditions. Transmission electron microscopy (TEM) revealed an exfoliated and good dispersed nanofiller structure throughout the matrix up to 3 wt% loading. The tensile strength, modulus, and weight of the samples decreased after combined UV radiation and condensation, with much less extent for the nanocomposites than neat epoxy indicating that the presence of organoclay led to dominant enhancement in mechanical properties endurance of epoxy resin to environmental degradation. Nanocomposites also displayed much lower weight loss as compared to the unfilled epoxy after being subjected to the accelerated weathering by either temperature-humidity or by combined UV radiation and condensation.