-
Open Access Article
1 - The effect of MgO doping on the structural, magnetic, and magnetotransport properties of La0.8Sr0.2MnO3 manganite
Mahin Eshraghi Parviz Kameli Hadi Salamati -
Open Access Article
2 - Experimental and theoretical investigation of spontaneous and surface-enhanced Raman scattering (SERS) spectroscopy of pure and boron-doped carbon nanotubes
H. Hasan Bouzari L. Farhang Matin R. Malekfar A. Shafiekhani -
Open Access Article
3 - "A comparative approach to the foundations of criminalization of doping in England's, German's and France's criminal law;(A step towards the criminalization of doping in Iranian's c
hamidreza heydarpour masoud hemmatDoping is the most unprofessional and unethical behavior in professional sport. In addition to the ethical and technical aspects, this phenomenon also has important legal aspects. In recent years, following the increase in cases of doping, the tendency to criminalize it MoreDoping is the most unprofessional and unethical behavior in professional sport. In addition to the ethical and technical aspects, this phenomenon also has important legal aspects. In recent years, following the increase in cases of doping, the tendency to criminalize it has clearly formed among some criminal policymakers, and some countries have explicitly criminalized doping and punishing it, but despite some other countries have not taken action in this regard. A clear example of the first countries is England, Germany and France, and an obvious example of the second category countries is Iran. The claim of this article is that by using the experience of criminal law systems in England, Germany and France, it is possible to take steps towards the criminalization of doping in Iran's criminal law and in this way, between the approach of Iran's criminal law system and the view of the system. The mentioned legal issues created more alignment. The main hypothesis of the current research is that the criminalization of doping in Iran's criminal law has a significant effect in reducing it. In order to further investigate these categories, in this research, while studying the concept of doping and the basics of its criminalization in the criminal law of England, Germany and France, the challenges facing the process of its criminalization in the criminal law of Iran have been examined. The current type of research is fundamental, its approach is descriptive-analytical, its method is library study, and the tool for collecting information is survey. Manuscript profile -
Open Access Article
4 - A Density Functional Theory Study of Boron Nitride Nano-Ribbons
Mahmoud Mirzaei -
Open Access Article
5 - A Comparative DFT Study on Structural and Electronic Properties of C24 and Some of Its Derivatives: C12B6N6, B6N6C12 and B12N12
M. Anafche F. Naderi -
Open Access Article
6 - Synthesis of SnO2 and C,N,S-tridoped SnO2 nanoparticles by Precipitation method
A. Nouri A. Fakhri Arezu Nouri -
Open Access Article
7 - Evaluation of Optimization Removal of Methyl Orange from Aqueous Solutions with Ag, Co/TiO2 Nano-Particles by Experimental Design
Nasim Ziaefar Saber Khodaei Jila Talat-Mehrabad Farzad Arjomandi RadBackground and objective: Studying photocatalytic activities, some factors including the concentration of the pollutant, the amount of photo-catalyst, pH, and calcination temperature affect the process of eliminating the pollutant from aquatic solutions. Using an experi MoreBackground and objective: Studying photocatalytic activities, some factors including the concentration of the pollutant, the amount of photo-catalyst, pH, and calcination temperature affect the process of eliminating the pollutant from aquatic solutions. Using an experimental design, it is possible to eliminate the unnecessary factors and determine the optimal conditions. Method: The Ag, Co/TiO2 Nano-particles for eliminating methyl orange has been evaluated. The four main variables involved in the process of elimination of methyl orange are the original concentration of the pollutant, the doges of photo-catalyst, pH, and calcination temperature. So arraying four factors changes at 3 levels. Therefore, considering the surface conditions for optimization and for determining the effect of each factor, totally 9 experiments are needed. Findings: The effect of the operational parameters include the original concentration of the pollutant, the amount of the photo-catalyst, pH, and calcination temperature, was optimized through experimental design. Discussion and Conclusion: The results of the experiments on photochemical degradation of Methyl Orange using Taguchi method showed that the greatest effect is related to original concentration of the MO and the amount of the Nano-catalyst. Manuscript profile -
Open Access Article
8 - Antimicrobial and Photocatalytic Properties of Bentonite/Titanium Dioxide Nanocomposites Doped with Silver
mahsa Madadi Mohammad GhorbanpourBackground and Objective: One of the main applications of titanium dioxide nanoparticles is killing the microorganisms spatially in drinking water and wastewater treatment. Method: Pure bentonite/Titanium Dioxide nanocomposites and doped with 3, 5 and 10% w/w sil MoreBackground and Objective: One of the main applications of titanium dioxide nanoparticles is killing the microorganisms spatially in drinking water and wastewater treatment. Method: Pure bentonite/Titanium Dioxide nanocomposites and doped with 3, 5 and 10% w/w silver were prepared by molten salt method. In this study, the antibacterial activity of silver doped titanium dioxide/bentonite nanocomposites was studied against two important microorganisms in food industry i.e. Escherichia coli and Staphylococcus aureusunder visible or UV radiation. The photocatalytic activity of these composites against methyl orange was also investigated. The prepared nanocomposites were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX), UV-Vis diffusive reflectance spectrometer (UV-Vis DRS). Findings: The scanning electron microscope was showed, that agglomeration of spherical TiO2 nanoparticles formed on the bentonite surface. The XRD pattern revealed that all of the samples have only an anatase phase with crystalline size less than 50 nm. According to EDX analysis, the silver ions successfully doped to the TiO2 nanoparticles. According to UV-Vis DRS results, increasing amounts of doped Ag content in the silver-doped titanium dioxide results in a higher visible absorbance capability of the materials. Parent bentonite did not show antibacterial activity. Titanium dioxide/bentonite nanocomposites showed very weak antibacterial activity. The results showed that the antibacterial ability was significantly improved by doping silver content comparing with pure TiO2/bentonite nanocomposites. This study also showed that Gram-positive bacteria (S. aureus) were more readily disinfected by the photo catalysts than a Gram-negative bacterium (E. coli). According to photocatalytic activity findings, doping of nanocomposites with 5 % silver ions showed maximum photocatalytic activity. This is attributed to the increasing visible absorption capacity due to the presence of silver ions. Discussion and Conclusion: Antibacterial and photocatalytic activity of titanium dioxide/bentonite nanocomposites increases dramatically due to the addition of silver ions. This can be attributed to the release of silver ions from nanocomposites and the increase in the production of free radicals as a result of increased photocatalytic activity due to reducing the energy gap of titanium dioxide nanoparticles in nanocomposites. Manuscript profile -
Open Access Article
9 - Investigation of Photocatalytic Activity of Acid Red 27 by Co-doped TiO2 Nanoparticle with Magnesium and Copper
farzad arjomandi rad Jila talat mehrabad rana khalilnezhadBackground and Objectives: Among the various types of contaminations, dyes have complicated structure and they are usually toxic and resistant to the biological treatment which enter into environment by industrial waste streams. The aim of this study was the removal of MoreBackground and Objectives: Among the various types of contaminations, dyes have complicated structure and they are usually toxic and resistant to the biological treatment which enter into environment by industrial waste streams. The aim of this study was the removal of C.I. Acid Red 27dye by photocatalytic processes. Materials and Methods: In the present study, Cu, Mg/TiO2 nanoparticle was synthesized using sol gel technique. The physicochemical properties were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) techniques. Findings: The XRD data showed anatase and rutile crystalline phase in catalysts, indicating that Cu and Mg co-doping did not influence the crystal patterns of TiO2. Also, the DRS results indicated that the band gap of co-doped photo catalyst was smaller than that of the monometallic and un-doped TiO2 and there was a shift in the absorption band towards the visible light region. Discussion and Conclusion: The photocatalytic efficiency of the synthesized catalysts was evaluated by degradation of C.I. Acid Red 27under visible light irradiation. The results showed that co-doping of the Cu and Mg can significantly improve the photocatalytic activity of the prepared photo catalysts. The results showed that Cu (0.1 wt.%), Mg (0.06 wt.%) co-doped TiO2 with optimum calcination temperature 450 °C had the highest photo activity among all samples under visible light. Additionally, the effect of influential parameters, such as doping content, photo catalyst dosage, initial dye concentration, initial pH and calcination temperature were studied. Manuscript profile -
Open Access Article
10 - Presentation of Clean Sport Development Model in Iran
Afshin Sharifi Shahab Bahrami Hasan SafikhaniBackground and Objective: Due to the importance of clean sports, it is necessary to make appropriate plans for its development in Iran. Therefore, the purpose of this study is to develop a framework for presenting a model for the development of clean sports in Iran with MoreBackground and Objective: Due to the importance of clean sports, it is necessary to make appropriate plans for its development in Iran. Therefore, the purpose of this study is to develop a framework for presenting a model for the development of clean sports in Iran with a combined design approach.Material and Methodology: The research method was a two-stage exploratory combination of instrument making. Qualitative research method, qualitative case study and potential participants included 17 faculty members. The research tool was a semi-structured interview. In the quantitative part, the research method was descriptive-survey. The statistical population of this study included the president, vice president and secretary of sports federations, whose number was 153 according to the 51 active federations in the country. According to Morgan's table, 113 people were identified as the research sample based on the available sampling method. Descriptive statistics and structural equation modeling were used to analyze the data to evaluate the fit of the research model.Findings: The results showed that the corresponding t-value of each factor has a significant effect and the whole framework of the clean sport development model in Iran was approved. Also, the results of the present study showed that the presentation of a clean sport development model in Iran includes causal conditions, contextual conditions, intervention conditions, consequences, and strategies. Also, the results of the present study showed that the research model has a good fit.Discussion and Conclusion: Therefore, it is concluded that the National Olympic Committee and the Ministry of Sports, in addition to increasing the amount of current budgets and credits and equipment in sports, allocate and hand over budgets and credits independently to the sports medicine federation to the development and expansion of clean sports in accordance with the existing standards. Country to be paid. Also, it should be done to create a database in sports federations in order to organize and employ experts in various sports fields, including experts, coaches, referees, and athletes in promoting clean sports. Manuscript profile -
Open Access Article
11 - Electroactive Materials Based on Thiophen: Study of the Doping and its Effect
Si Mohamed Bouzzine Mohamed Hamidi Mohamed Bouachrine -
Open Access Article
12 - Enhancement of Methane Adsorption by Lithium Doping into Metal-Organic Framework Cu-BDC
Mansoor Anbia Hosein Pazoki -
Open Access Article
13 - Effect of lithium doping in electron injection layer on the LED performance in reverse structure
Mohammad Zirak Hasan Alehdaghi -
Open Access Article
14 - Fabrication of Na-W Co-Doped Exfoliated G-C3N4 Nanoparticles for Methylene Blue Removal
Mohammad Javad Hakimi-Tehrani Seyed Ali Hassanzadeh Tabrizi Narjes Koupaei Ali Saffar Mahdi Rafiei -
Open Access Article
15 - Simple solvothermal synthesis of a novel Er3+ and Nd3+ doped Sr2As2O7 nanomaterials and investigation of catalytic performance for synthesis of organic compounds
shahka Ekhtiyari leila kafi ahmadi shahin khademinia -
Open Access Article
16 - PVA and EDTA grafted superparamagnetic Ni doped iron oxide nanoparticles prepared by constant current electrodeposition for biomedical applications
Mustafa Aghazadeh Isa Karimzadeh Mohammad Reza Ganjali -
Open Access Article
17 - Fabrication of Silver doped Buckypaper and Investigation of its Properties
Yoan Zhi Silvia Tokomatov -
Open Access Article
18 - PVA and EDTA grafted superparamagnetic Ni doped iron oxide nanoparticles prepared by constant current electrodeposition for biomedical applications
Mustafa Aghazadeh Isa Karimzadeh Mohammad Reza Ganjali -
Open Access Article
19 - Facile Synthesis of Pd/Cu2O Octahedral with Enhanced Photocatalytic Activity and Its Application of Degradation of Direct Red 278
Shahla Ekhtiyari Leila Kafi-Ahmadi Shahin Khademinia -
Open Access Article
20 - Electronic Behavior of Doped Graphene Nanoribbon Device: NEGF+DFT
Sadegh Afshari Jaber Jahanbin Sardroodi Hakimeh Mohammadpour -
Open Access Article
21 - Doping TiO2 by Cr from tannery wastewater for improving its activity under visible light in the dye degradation
Endang Wahyuni Sri Wahyuni Mandrea Nora Novianti Lestari Suherman Suherman -
Open Access Article
22 - Synthesis of NiO nanoparticles doped with Cu (II) by a planetary ball mill and its characterization
Elham Sajjadi masih darbandiIn this research, first mesoporous nickel hydroxide nanoparticles were synthesized by solvothermal method. Then the nickel hydroxide nanoparticles were converted into nickel oxide nanoparticles by maintaining the structure and morphology during heat treatment and then d MoreIn this research, first mesoporous nickel hydroxide nanoparticles were synthesized by solvothermal method. Then the nickel hydroxide nanoparticles were converted into nickel oxide nanoparticles by maintaining the structure and morphology during heat treatment and then doped with copper (П) by ball milling method. Since no toxic, expensive, and complex chemicals were used during the synthesis process, the results of this research can be considered scientifically and industrially in the production of other doped nanomaterials. Methods such as scanning electron microscopy (SEM), X-ray diffraction (XRD), energy–dispersive spectroscopy (EDS), and surface area and porosity measurement by nitrogen absorption and desorption method (BET) were used to study the structure and chemical composition of the synthesized nanomaterials. XRD patterns showed FCC structure of the synthesized nanoparticles and the absence of impurity phase. Also, BET measurements showed the mesoporous nature of nanoparticles and good specific surface area and pore volume. The catalytic behavior of copper doped nickel oxide nanoparticles in the removal and sonophotocatalytic degradation of phenol pollutant under visible light and ultrasound waves was studied. It was observed that the phenol substance soluble in water as a model pollutant was destroyed by about 86.5% under visible light and ultrasonic waves after adding copper doped nickel oxide catalyst. Manuscript profile -
Open Access Article
23 - Synthesis of nanostructured bornite by mechanical alloying and investigate the effect of co-doping Zn and Co on its thermoelectric properties
Ahmad Ostovari Moghaddam Ali ShokuhfarTo improve current solid state thermoelectric devices, high performance materials based on safe and abundant elements is required. Here, the thermoelectric properties of Cu5-2xZnxCoxFeS4 (0 ≤ x ≤ 0.06) nanostructured samples were investigated. First, Cu5-2xZnxCoxF MoreTo improve current solid state thermoelectric devices, high performance materials based on safe and abundant elements is required. Here, the thermoelectric properties of Cu5-2xZnxCoxFeS4 (0 ≤ x ≤ 0.06) nanostructured samples were investigated. First, Cu5-2xZnxCoxFeS4 nanoparticles were synthesized by high energy ball milling and then consolidated into pellets by hot pressing. X-ray diffraction (XRD) analysis was employed for structural study, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used for microstructural analysis, and the thermoelectric properties were evaluated by electrical conductivity and thermal conductivity measurements. XRD data revealed that the crystal structure of the materials to be consistent with a pure bornite phase up to x = 0.04 for Cu5-2xZnxCoxFeS4. The power factor of un-substituted sample was 0.25 mWm-1K-2 which decrease after Co and Zn substitution. Concurrent substituting of Co and Zn for Cu in the range of 0.02 ≤ x ≤ 0.04 changed the p-type conduction of bornite to n-type at room temperature and up to 527 K. Extremely low thermal conductivities of k < 0.30 Wm-1K-1 were obtained for all double substituted samples as a results of the significant mass and strain field fluctuations and the nanostructured nature of the samples. The highest ZT value of 0.35 was attained for x = 0.06. Manuscript profile -
Open Access Article
24 - Presenting a Model for the Development of Doping-Free Sport in Iran
afshin sharifi shahab bahrami hasan safikhaniThe purpose of this study was to develop a framework for presenting a model for the development of doping-free sports in Iran with a combined design approach. The research method was a two-stage exploratory combination of instrument making. Qualitative research method, MoreThe purpose of this study was to develop a framework for presenting a model for the development of doping-free sports in Iran with a combined design approach. The research method was a two-stage exploratory combination of instrument making. Qualitative research method, qualitative case study and potential participants included 17 faculty members. The research tool was a semi-structured interview. In the quantitative part, the research method was descriptive survey. The statistical population of this study included the president, vice president and secretary of sports federations, whose number was 153 according to the 51 active federations in the country. According to Morgan's table, 113 people were identified as the research sample based on the available sampling method. Ten faculty members of sports management were used to evaluate the face validity and the carcass model was used for the content validity of the questionnaire questions and the content validity was confirmed. Convergent validity, hybrid reliability and Cronbach's alpha were also confirmed. Descriptive statistics and structural equation modeling were used to analyze the data to evaluate the fit of the research model. The results showed that the amount of t in each factor has a significant effect and the whole framework of the doping-free sport development model in Iran was approved. Also, the results of the present study showed that the presentation of a model for the development of doping-free sports in Iran includes causal conditions, contextual conditions, intervention conditions, consequences, and strategies. Also, the results of the present study showed that the research model has a good fit. Manuscript profile