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Progress in Natural Science:Materials International 2016年第6期26卷 517-522页

作者： Vahid Saadattalab alireza Shakeri Hamid Gholami School of Chemistry University College of Science University of Tehran

Polyaniline was synthesized chemically in an acidic medium in the presence of Ammonium Peroxydisulphate(APS) as an oxidizing agent. PANI(Polyaniline) nanocomposites were prepared in the presence of various amount of carbon nanotube and zinc oxide(from 1 to 5 wt%) by solution casting method. The free-standing film of polyaniline and its nanocomposites were obtained by vaporization of solvent content. The composition,morphology and structure of the polymer and the nanocomposites were characterized by Fourier transform infrared spectroscopy FT-IR spectra, scanning electron microscopy(SEM) image and XRD pattern. In addition,thermal stability was studied by TGA analysis, electrical conductivity was measured by four-point probe technique and mechanical properties were studied by tensile strength test. The characteristic FTIR peaks of PANI were found to shift to lower wave number in nanocomposites due to the formation of H-bonding. XRD results revealed that the crystallinity of PANI was more noticeable after addition of nano-ZnO, while the intensity of the peaks increased by the addition of ZnO nanoparticles. Furthermore, TGA results showed that the decomposition of the nanocomposite was less than that of pure polyaniline which confirms the successful fabrication of products. Young's modulus and strength at break point were increased in the case of the nanocomposite, in addition, the electrical conductivity of the PANI/ZnO nanocomposite film was found to be smaller than that of the PANI film while CNTs increase the conductivity of polyaniline.

关键词： Conductive polymer Polyaniline Nanocomposite Zinc oxide CNT

High efficiency visible-light-driven Fe_2O_3-xS_x/S-doped g-C_3N_4 heterojunction photocatalysts: Direct Z-scheme mechanism

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Journal of Materials Science & Technology 2018年第9期34卷 1511-1525页

作者： Milad Jourshabani Zahra Shariatinia alireza Badiei Department of Chemistry Amirkabir University of Technology (Tehran Polytechnic) School of Chemistry College of Science University of Tehran Nanobiomedicine Center of Excellence Nanoscience and Nanotechnology Research Center University of Tehran

Several nanoporous Fe2 O3-xSx/S-doped g-C3 N4（CNS） Z-scheme hybrid heterojuctions have been successfully synthesized by one-pot in situ growth of the Fe2O3-xSx particles on the surface of CNS. The characterization results show that S-doping in the g-C3 N4 backbone can greatly enhance the charge mobility and visible light harvesting capability. In addition, porous morphology of hybrid composite provides available open pores for guest molecules and also improves light absorbing property due to existence of multiple scattering effects. More importantly, the Fe2 O3-xSx nanoparticles formed intimate heterojunction with CNS and developed the efficient charge transfer by extending interfacial interactions occurred at the interfaces of both components. It has been found that the Fe2 O3-xSx/CNS composites have an enhanced photocatalytic activity under visible light irradiation compared with isolated Fe2 O3 and CNS components toward the photocatalytic degradation of methylene blue（MB）. The optimal loaded Fe2 O3-xSx value obtained is equal to 6.6 wt% that provided 82% MB photodegradation after 150 min with a reaction rate constant of 0.0092 min（-1） which was faster than those of the pure Fe2 O3（0.0016 min（-1））and CNS（0.0044 min（-1）） under the optimized operating variables acquired by the response surface methodology. The specific surface area and the pore volume of Fe2 O3（6.6）/CNS hybrid are 33.5 m2/g and0.195 cm3/g, which are nearly 3.8 and 7.5 times greater compared with those of the CNS, respectively. The TEM image of Fe2 O3（6.6）/CNS nanocomposite exhibits a nanoporous morphology with abundant uniform pore sizes of around 25 nm. Using the Mott-Schottky plot, the conduction and valence bands of the CNS are measured（at pH = 7） equal to-1.07 and 1.48 V versus normal hydrogen electrode（NHE）, *** tests prove that ·OH-and ·O2-radicals are major active species in the photocatalytic *** has been established that formation of the Z-scheme Fe2 O3（6.6）/CNS he

关键词： Visible light irradiation Nanophotocatalyst in situ S-doping Z-scheme heterojunction Response surface methodology(RSM)

Synthesis of 4-（4-Methylsulfonylphenyl）-3-phenyl-2（3H）-thiazole Thione Derivatives as New Potential COX-2 Inhibitors

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Chinese Journal of Chemistry 2006年第6期24卷 791-794页

作者： EMAMI, Saeed FOROUMADI, alireza Department of Medicinal Chemistry Faculty of Pharmacy Mazandaran University of Medical Sciences Sari Iran Pharmaceutical Sciences Research Center Tehran University of Medical Sciences Tehran Iran

Synthesis of novel 4-（4-methylsulfonylphenyl）-3-phenyl-2（3H）-thiazole thione derivatives with functionalized diarylheterocycle pharmacophore as potential COX-2 inhibitors was described. The title compounds were synthesized by cyclocondensation of corresponding dithiocarbamate and 2-bromo-1-（4-methylsulfonylphenyl）ethanone, followed by dehydration with H2SO4. All of the target compounds were characterized by ^1H NMR, IR and mass spectral data.

关键词： synthesis diaryl heterocycle 2(3H)-thiazole thione COX-2 inhibitor

Ground motion record simulation for structural analysis by consideration of spectral acceleration autocorrelation pattern

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Earthquake Engineering and Engineering Vibration 2014年第2期13卷 195-202页

作者： alireza Azarbakht Mahdi Sadeghi Mehdi Mousavi Department of Civil Engineering Faculty of Engineering Arak University

A novel approach is introduced to generate simulated ground motion records by considering spectral acceleration correlations at multiple periods. Most of the current reliable Ground Motion Record(GMR) simulation procedures use a seismological model including source, path and site characteristics. However, the response spectrum of simulated GMR is somewhat different when compared with the response spectrum based on recorded GMRs. More specifi cally, the correlation between the spectral values at multiple periods is a characteristic of a record which is usually different between simulated and recorded GMRs. As this correlation has a signifi cant infl uence on the structural response, it is needed to investigate the consistency of the simulated ground motions with actual records. This issue has been investigated in this study by incorporating an optimization algorithm within the Boore simulation technique. Eight seismological key parameters were optimized in order to achieve approximately the same correlation coeffi cients and spectral acceleration between two sets of real and simulated records. The results show that the acceleration response spectra of the synthetic ground motions also have good agreement with the real recorded response spectra by implementation of the proposed optimized values.

关键词： stochastic method simulation ground motion random vibration site amplifi cation EXSIM program

Fabrication of g-C_(3)N_(4) nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe)nanocomposites:Double S-scheme photocatalysts with impressive performance for the removal of antibiotics under visible light

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International Journal of Minerals,Metallurgy and Materials 2023年第7期30卷 1363-1374页

作者： Nasrin Sedaghati Aziz Habibi-Yangjeh alireza Khataee Department of Chemistry Faculty of ScienceUniversity of Mohaghegh ArdabiliArdabil 56199-11367Iran Research Laboratory of Advanced Water and Wastewater Treatment Processes Department of Applied ChemistryFaculty of ChemistryUniversity of TabrizTabriz 51666-16471Iran Department of Environmental Engineering Faculty of EngineeringGebze Technical UniversityGebze 41400Turkey

Novel graphitic carbon nitride(g-C_(3)N_(4))nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe)photocatalysts(denoted as GCN-NSh/Bi_(5)O_(7)Br/FeMOF,in which MOF is metal–organic framework)with double S-scheme heterojunctions were synthesized by a facile solvothermal *** resultant materials were examined by X-ray photoelectron spectrometer(XPS),X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDX),transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),photoluminescence spectroscopy(PL),Fourier transform infrared spectroscopy(FT-IR),UV-Vis diffuse reflection spectroscopy(UV-vis DRS),photocurrent density,electrochemical impedance spectroscopy(EIS),and Brunauer–Emmett–Teller(BET)*** the integration of Fe-MOF with GCN-NSh/Bi_(5)O_(7)Br,the removal constant of tetracycline over the optimal GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite was promoted 33 times compared with that of the pristine *** GCN-NSh/Bi_(5)O_(7)Br/Fe-MOF(15wt%)nanocomposite showed superior photoactivity to azithromycin,metronidazole,and cephalexin removal that was 36.4,20.2,and 14.6 times higher than that of pure GCN,*** quenching tests showed that·O_(2)-and h+mainly contributed to the elimination *** addition,the nanocomposite maintained excellent activity after 4 successive *** on the developed n–n heterojunctions among n-GCN-NSh,n-Bi_(5)O_(7)Br,and n-Fe-MOF semiconductors,the double S-scheme charge transfer mechanism was proposed for the destruction of the selected antibiotics.

关键词： g-C_(3)N_(4)nanosheet/Bi_(5)O_(7)Br/NH_(2)-MIL-88B(Fe) metal-organic framework double S-scheme heterojunctions antibiotics pho-tocatalytic performance

GIS-based spatial analysis of urban traffic accidents： Case study in Mashhad, Iran

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Journal of Traffic and Transportation Engineering(English Edition) 2017年第3期4卷 290-299页

作者： Gholam Ali Shafabakhsh Afshin Famili Mohammad Sadegh bahadori Department of Civil Engineering Semnan University Semnan Iran Glenn Department of Civil Engineering Clemson Unioersity Clemson SC 29634 USA Instituto Superior Tecnico University of Lisbon Lisbon 1600-276 Portugal

There is a growing concern in traffic accident rate in recent years. Using Mashhad city （Iran second populous city） traffic accident records as case study, this paper applied the combi- nation of geo-information technology and spatial-statistical analysis to bring out the influence of spatial factors in their formation. The aim of the study is to examine 4 clustering analyses to have a better understanding of traffic accidents patterns in complex urban network. In order to deploy the clustering technique in urban roads, 9331 point features for inner city traffic accidents during 12 months have been registered according to their x and y location in geographic information system （GIS）. The mentioned areas were analyzed by kernel density estimation （KDE） using ARCMAP and two other analyses using SANET 4th edition software so that the results of network analysis can be compared with traditional KDE method. In addi- tion, this research introduces five classifications for determining the eventfulness of the under study area based on standard deviation and to make priority in creating security in the area. The nearest neighbor and K-function output analysis consist of four curves and regarding the fact that for all fatal, injury and property damage only crashes, the observed value curve is above the 5% confidence interval. Accidents in the study region are more clustered than ex- pected by random chance. The importance of this study is to use GIS as a management system for accident analysis by combination of spatial-statistical methods.

关键词： Traffic accidents Hotspots Kernel density analysis Nearest neighbor K-function

Tannin characterization and sourcing in historical leathers through FTIR spectroscopy and PCA analysis

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Collagen and Leather 2023年第3期5卷 73-81页

作者： alireza Koochakzaei Mohammadamin Sabaghian Faculty of Cultural Materials Conservation Tabriz Islamic Art UniversityTabrizIslamic Republic of Iran

This study aimed to identify and classify the type of plants used for tanning historical leathers using cost-effective Fourier transform infrared(FTIR)*** investigation was carried out on five plants(oak bark,sumac,valonia,tara,and gallnut)and four historical leather samples from book bindings dating back to the Qajar *** extraction from both plants and leathers was performed using acetone-water solvent,and the samples were then subjected to FTIR ***-processing of the spectra included baseline correction,smoothing,and *** component analysis(PCA)was used to identify the source of tannins based on FTIR *** was found to provide a good separation of condensed tannins from hydrolysable ***,PCA analysis allowed for the separation and identification of the type of plant used for tannin *** examination of historical leather samples revealed that the primary classification based on the type of tannin is possible,but accurate identification faces challenges due to structural changes and degradation over time.

关键词： Vegetable tanning Tannin characterization Historical leather FTIR PCA Hydrolysable tannins

Massive Dirac particles based on gapped graphene with Rosen-Morse potential in a uniform magnetic field

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Chinese Physics B 2024年第8期33卷 170-178页

作者： A.Kalani alireza Amani M.A.Ramzanpour Department of Physics Ayatollah Amoli BranchIslamic Azad UniversityAmolIran

We explore the gapped graphene structure in the two-dimensional plane in the presence of the Rosen-Morse potential and an external uniform magnetic *** order to describe the corresponding structure,we consider the propagation of electrons in graphene as relativistic fermion quasi-particles,and analyze it by the wave functions of two-component spinors with pseudo-spin symmetry using the Dirac ***,to solve and analyze the Dirac equation,we obtain the eigenvalues and eigenvectors using the Legendre differential *** that,we obtain the bounded states of energy depending on the coefficients of Rosen-Morse and magnetic potentials in terms of quantum numbers of principal n and spin-orbit ***,the values of the energy spectrum for the ground state and the first excited state are calculated,and the wave functions and the corresponding probabilities are plotted in terms of coordinates *** what follows,we explore the band structure of gapped graphene by the modified dispersion relation and write it in terms of the two-dimensional wave vectors K_(x) and K_(y).Finally,the energy bands are plotted in terms of the wave vectors K_(x) and K_(y) with and without the magnetic term.

关键词： massive Dirac equation Rosen–Morse potential Legendre polynomial gapped graphene pseudospin symmetry

Qubit movement-assisted entanglement swapping

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Chinese Physics B 2020年第5期29卷 92-100页

作者： Sare Golkar Mohammad Kazem Tavassoly alireza Nourmandipour Atomic and Molecular Group Faculty of PhysicsYazd UniversityYazd 89195-741Iran Photonic Research Group Engineering Research CenterYazd UniversityYazd 89195-741Iran Department of Physics Faculty of ScienceSirjan University of TechnologySirjanIran

We propose a scheme to generate entanglement between two distant qubits(two-level atom)which are separately trapped in their own(in general)non-Markovian dissipative cavities by utilizing entangling swapping,considering the case in which the qubits can move along their cavity axes rather than a static state of *** first examine the role of movement of the qubit by studying the entropy evolution for each *** average entropy over the initial states of the qubit is *** by performing a Bell state measurement on the fields leaving the cavities,we swap the entanglement between qubit-field in each cavity into qubit-qubit and field-field *** entangling power is used to measure the average amount of swapped entanglement over all possible pure initial *** results are presented in two weak and strong coupling regimes,illustrating the positive role of movement of the qubits on the swapped *** is revealed that by considering certain conditions for the initial state of qubits,it is possible to achieve a maximally long-leaving stationary entanglement(Bell state)which is entirely independent of the environmental variables as well as the velocity of *** happens when the two qubits have the same velocities.

关键词： dissipative systems quantum entanglement entanglement swapping

Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 579-594页

作者： alireza Hadi Javad Karimi-Sabet Abolfazl Dastbaz Department of Chemical Engineering Faculty of EngineeringUniversity of TehranTehranIran Material and Nuclear Fuel Research School(MNFRS) Nuclear Science and Technology Research InstituteTehranIran

The room temperature synthesis of ZIF-8 micro-and nano-particles was investigated using a mixed methanol-water solvent ***-8 particles of good quality and high crystallinity were *** surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield,particle size distribution,and mean particle *** ligand/metal salt molar ratio followed by the amount of sodium formate(the deprotonating agent)and then the amount of water(i.e,the composition of the mixed solvent)respectively had the largest effects on both the ZIF-8 yield and particle *** showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 *** method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives(like sodium formate).In addition,ZIF-8 samples with different mean particle sizes(100,500,and 1000 nm)were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.

关键词： metal organic frameworks zeolitic imidazo-late frameworks ZIF-8 response surface methodology Box Behnken design CO adsorption