Iranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901Preparation of Hexanitrohexaazaisowurtzitane (HNIW) Nano Particle by Normal Microemulsion Based Nonionic Surfactant1151204007ENY.BayatDepartment of Chemistry and Chemical Engineering, Malek Ashtar University, Tehran, I. R. IranM.ZarandiDepartment of Chemistry and Chemical Engineering, Malek Ashtar University, Tehran, I. R. IranJournal Article20130710The behavior of nanoscale energetic materials is quite different from micronsized energetic materials in many ways. Recently, some techniques such as sol-gel method, high speed air impaction and vacuum codeposition have been employed to obtain nanoscale energetic materials. However, only few attentions were paid to nanoscale energetic materials because of the fabrication difficulty. In this paper, the simple preparation of a nitramine 2,4,6,8,10,12 hexanitro 2,4,6,8,10,12 hexaazaiso wurtzitane (HNIW) with nanometer size by microemulsion method is presented. The microemulsion systems contained tween80, 2-propanol and n-butyl acetate as the oil phase. On the base of DLS measurement average particle size is 8 nm. The prepared nanoparticles are semispherical based on SEM picture.https://www.ijnnonline.net/article_4007_ab8df9f7733db5611fd53748f1db282e.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901A New and Efficient Method for the Adsorption and Separation of Arsenic Metal Ion from Mining Waste Waters of Zarshouran Gold Mine by Magnetic Solid-Phase Extraction with Modified Magnetic Nanoparticles1211264008ENM.MoradianApplied Research Centre of Geological Survey of Iran, Tehran, I. R. IranMMoradianKashan University, Faculty of Chemistry, Department of Organic Chemistry, Kashan, I. R. IranZ.BoroumandApplied Research Centre of Geological Survey of Iran, Tehran, I. R. IranJournal Article20130805Widespread arsenic contamination of mining wastewater of Zarshouran (West Azerbaijan province) has led to a massive epidemic of arsenic poisoning in the whole of surrounding areas. It is estimated that approximately all agriculture fields are being irrigated with the water that its arsenic concentrations elevated above the World Health Organization’s standard of 10 parts per billion. A novel advanced magnetic matter adsorbent using magnetite embedded within nanosized Fe3O4 was prepared and applied for separation of arsenic metal ion from aqueous solution. This adsorbent combines the advantages of magnetic nanoparticles with magnetic separability and high affinity toward arsenic metal ions, which provides distinctive merits including easy preparation, high adsorption capacity, and easy isolation from sample solutions by the application of an external magnetic field. The adsorption behaviors of arsenic from an aqueous medium, using iron magnetite nanoparticles were studied by using equilibrium batch and column flow techniques. The effects of pH, contents of loaded magnetic matter nanoparticles, ionic strength, adsorbent dose, contact time, and temperature on adsorption capacity of the magnetic beads were investigated. All the results suggested that the mentioned nanoparticles could be excellent adsorbents for As(II) and As(III) contaminated water treatment.https://www.ijnnonline.net/article_4008_21b5680d80f75a616096f2e791affac6.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901Investigating the Ibuprofen Chiral Forms Interactions with Single Wall Carbon Nanotube1271384009ENN.FarhadianChemical Engineering Department, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, I. R. Iran.Journal Article20130710The aim of this study is investigating the transport mechanism of ibuprofen chiral isomers inside single wall carbon nano tube (SWCNT) using mathematical modeling. To achieve this goal, molecular dynamics simulation has been performed to evaluate the interactions of ibuprofen isomers with SWCNT in an aqueous solution. Results show that both chiral forms of ibuprofen molecules enter and remain inside SWCNT from their methyl side chains and their movement is not along the centerline of the tube. The distance of the closest atom of the drug molecule from SWCNT surface is around 2.26A˚. A tilted angle between ibuprofen molecule and internal surface of SWCNT is detected to be around 34◦. Moreover, these ibuprofen chiral forms interact to each other from their carboxylic side chain. This causes ibuprofen fluctuation inside SWCNT around the tube axis. Also, calculated results do not show any significant differences between selectivity of SWCNT toward R- and S- chiral forms of ibuprofen molecule. This confirms that both ibuprofen chiral forms have the same transport mechanism inside SWCNT.https://www.ijnnonline.net/article_4009_cb5f984421c93f1efb42b53a43f83c3a.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901Microwave–Assisted Hydrothermal Synthesis and Optical Characterization of SnO2 Nanoparticles1391424010ENP.BoroojerdianDepartment of Passive Defense, Malek Ashtar University of Technology, Tehran, I. R. Iran.Journal Article20130628Semiconductor nanoparticles exhibit size dependent properties due to quantum confinement effect that are not present in their bulk counterparts. In this work, extremely fine and pure SnO2 nanoparticles of ~1.1 nm size were synthesized by a solution process, in which amorphous precipitate of SnO2 was crystallized by microwave heating. The particles sizes varied from ~1.1 to ~2.7 nm. By XRD analysis, the particle size, crystal structure and purity of the samples were determined. The UV-Vis measurements of SnO2 nanoparticles, showed that, excitonic peaks existed at ~237, ~250 and ~279 nm corresponding to ~1.1, ~2 and ~2.7 nm clusters respectively. The STM analysis showed that the nanoparticles were spherical in shape, having narrow size distribution.https://www.ijnnonline.net/article_4010_6693a7aacb8a2e74c6f5fe91bc39864b.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901The Elemental Doping Effects on the Vibronic Properties of Nd: KTP Nanocrystallites1451504011ENR.MalekfarPhysics Department, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, I. R. IranA.CheraghiPhysics Department, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, I. R. Iran
Shahid Sattari University, Tehran, I. R. IranG.AhmadiPhysics Department, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, I. R. IranH.NanakarShahid Sattari University, Tehran, I. R. IranA.MansoriShahid Sattari University, Tehran, I. R. IranA.AmerianShahid Sattari University, Tehran, I. R. IranJournal Article20130523In this work the synthesization process of nanocrstallite Nd:KTP powders by modified Pechini method was studied. The results of XRD studies indicate that KTP nanocrystallites doped by Nd has orthorhombic phase. The structural and lattice modes of the synthesized nanocrystallite products were investigated by using Micro Raman back scattering and FT-IR transmission spectroscopies. SEM imaging technique was applied for the observation of grain sizes and the morphology of the nanoparticles. The Debye-Scherrer formula was used to confirm the grain sizes determined by the SEM slides. In overall conclusion, it can be claimed that XRD, SEM and back scattering Raman spectroscopy are suitable methods to study the quality and characterization of nanocrystallite materials such as KTP family nanocrystals.https://www.ijnnonline.net/article_4011_b14680dec683e744ada1f2fe08614086.pdfIranian Nanotechnology SocietyInternational Journal of Nanoscience and Nanotechnology1735-70049320130901Modeling and Optimization of Nano-bubble Generation Process Using Response Surface Methodology1511624012ENR.AhmadiMineral Processing Department, Faculty of Engineering, Tarbiat Modares University, Tehran, I. R. IranA.Khodadadi DarbanCivil- Environmental Engineering, Mineral Processing Department, Faculty of Engineering, Tarbiat
Modares University, Tehran, I. R. IranJournal Article20130521In this paper, size distribution of nano-bubbles was measured by the reliable and fast method of laser diffraction technique. Nano-bubbles were produced using a nano-bubble generator designed and made based on hydrodynamic cavitation phenomenon in Venturi tubes. A Central Composite Design with Response Surface Methodology was used to conduct a five factor, five level factorial experimental design on the main process variables including frother concentration, solution temperature, pH, air flow rate and pressure drop in the cavitation tube nozzle. The statistical analysis used to develop a model for predicting the median size of nanobubbles (D50) showed that the frother concentration, solution temperature and air flow rate have the highest effect on the size of nanobubbles. Results demonstrated that with increasing the frother concentration and the air flow rate, the median nanobubble size (D50) decreased. The results also indicated that an addition of 20~ 40°C temperature, increased the median size of the nanobubbles formed in the solution. In the optimum condition, the frother concentration, solution temperature and air flow rate were found to be 69.5 mg/h-1, 20°C and 0.3 Lmin-1, respectively. In this study, the minimum median size of the nanobubbles produced in the laboratory and predicted by the prediction model was 130.75 and 129.83 nm,respectively, which showed that the model results properly fitted with experimental results.https://www.ijnnonline.net/article_4012_bd3ef5c19067fe179f71c8b86ea4b39b.pdf