@article { author = {Gholami-Shabani, M. and Gholami-Shabani, Z. and Shams-Ghahfarokhi, M. and Akbarzadeh, A. and Riazi, Gh. and Razzaghi-Abyaneh, M.}, title = {Biogenic Approach using Sheep Milk for the Synthesis of Platinum Nanoparticles: The Role of Milk Protein in Platinum Reduction and Stabilization}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {199-206}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {Bio-directed synthesis of nanoparticles is an interesting field of rapid advancement for biologists,chemists and materials scientists, especially in light of efforts to find out green methods of inorganicmaterial synthesis. In the present study, green synthesis of platinum nanoparticles (PtNPs) using sheepmilk is reported for the first time. By adjusting the concentrations of chloroplatinic acid (H2PtCl6) andmilk in aqueous solutions, spherical PtNPs were obtained at room temperature. The nanoparticlesobtained were characterized by UV-Vis spectroscopy, dynamic light scattering (DLS), high-resolutionTransmission Electron Microscopy (TEM) and X-Ray diffraction (XRD). The spherical particles obtainedhave an average size 9.0 nm as shown by XRD pattern and TEM analysis. Fourier Transform Infra-Red(FTIR) measurements were carried out to identify the possible biomolecules responsible for capping andefficient stabilization of the PtNPs synthesized by milk. The carboxylic acid group libration and amide Iand II bands revealed the binding of protein with platinum surface through the amine group rather thanthe carboxyl group. Among a wide variety of biological resources which are introduced for reducing Ptions into PtNPs, green approaches like using sheep milk have outstanding benefits for synthesizebiological metal nanoparticles due to their eco-friendly phenomenon and very less amounts ofcytotoxicity. PtNPs green synthesized in this study are potential candidates to use in drug discovery andgene transfer technologies.}, keywords = {Green synthesis,Platinum nanoparticles,Sheep milk,Electron microscopy,Physicochemical characterization}, url = {https://www.ijnnonline.net/article_24539.html}, eprint = {https://www.ijnnonline.net/article_24539_8841cec6eba272dfe1ec01b7ea7850c5.pdf} } @article { author = {khazaei, A. and Nazari, S. and Karimi, Gh. and Ghaderi, E. and Mansouri Moradian, Kh. and Bagherpor, Z. and Nazari, S.}, title = {Synthesis and Characterization of γ-Alumina Porous Nanoparticles from Sodium Aluminate Liquor with Two Different Surfactants}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {207-214}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {Among the various phases of alumina, two phases γ and α are the most widely used in variousindustries. In this paper, γ-Al2O3 porous nanoparticles have been successfully synthesized from a simpleaqueous sol–gel method using inexpensive material such as: sodium aluminate liquor, HCl, NaOH,Polyethylene glycol (PEG) and polyvinyl alcohol (PVA). Sodium aluminate liquor was extracted fromBayer liquor of alumina product processed in the Jajarm alumina factory. PEG and PVA were used asstructure-stabilizing agents. The structures and properties of samples calcined at 800 ºC, wereperformed utilizing X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electronmicroscopy (SEM), termogeravimetery analysis (TG/DTA), and N2 adsorption/desorption techniques.Prepared sample of γ-Al2O3 with polyethylene glycol surfactant has an average crystallite size of 2.313nm, average particle size of 20 nm, specific surface area (SSA) of 138.8 m2/g, and pore volume of ∼0.166 cm3/g. The average crystallite size of 2.063 nm, average particle size of 46 nm, specific surfacearea of 201.1 m2/g, and pore volume of ∼ 0.246 cm3/g, were achieved using polyvinyl alcohol surfactant.}, keywords = {γ-alumina,Porous,Sodium aluminate liquor,nanoparticles,surfactant}, url = {https://www.ijnnonline.net/article_22929.html}, eprint = {https://www.ijnnonline.net/article_22929_c92605328940e2eb42eba4f717184cd3.pdf} } @article { author = {Maleki, A.}, title = {Efficient Synthesis of 2, 3-Dihydroquinazolin-4(1H)-ones in the Presence of Ferrite/Chitosan as a Green and Reusable Nanocatalyst}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {215-222}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {In this work, an efficient and facile method has been developed for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones from a condensation reaction of 2-aminobenzamide with various alkyl,aryl and alicyclic aldehydes or ketones using Fe3O4/chitosan as an environmentally benign, magneticallyrecoverable nanocomposite catalyst in ethanol at room temperature in high to excellent yields undermild reaction conditions. The Fe3O4/chitosan composite nanocatalyst was first prepared by a sol-gelmethod and characterized by using a variety of conventional techniques including Fourier transformsinfrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) andX-ray diffraction (XRD) analyses. The present work include several advantages such as avoiding the useof toxic solvents or expensive catalysts, generality, high yields, short reaction times, clean reactionprofile, ease of product isolation, simplicity, recyclability of the catalyst and finally agreement with thegreen chemistry protocols. All make it a useful and attractive protocol for the synthesis of heterocycliccompounds like quinazolinone derivatives.}, keywords = {Magnetic nanoparticles,Fe3O4,Chitosan,Dihydroquinazolinone,Heterogeneous catalysts}, url = {https://www.ijnnonline.net/article_22930.html}, eprint = {https://www.ijnnonline.net/article_22930_3e43e7a683da8c3b3b0ce7d6c0c01fc9.pdf} } @article { author = {Meftah, T. and Zerafat, M. M.}, title = {Nitrate Removal from Drinking Water using Organo-Silane Modified Natural Nano-Zeolite}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {223-232}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {Nitrate-containing compounds are considered as groundwater contaminants, the concentration of whichhas been growing in these resources during recent years. As a result, it seems necessary to use effectivemethods to remove nitrate from water and wastewater. Adsorption is generally considered moreeconomical in water treatment compared to other feasible alternative techniques. Natural Clinoptilolitezeolite is one of the best absorbents because of its high capacity and low cost. Surfactants such ashexadecyl trimethyl ammonium (HDTMA) are usually used for modification but they are not stable andremoved as a result of subtle temperature variations. In this research, zeolite nanoparticles arechemically modified by 3-aminopropyl triethoxysilane. The advantage of this modification method is itsstability at different environmental conditions. Adsorbent properties have been analyzed by PSA, FTIR,XRD, FESEM and CHN elemental analysis. Also, nitrate adsorption capacity of modified zeolite wasexamined by UV-Vis spectroscopy. NH2 groups are developed on the zeolite surface as a result oforgano-silane modification, which must be converted to NH4+ so that nitrate adsorption becomespossible in acidic conditions. Based on the results, the best nitrate removal capacity is achieved at thelowest concentration and pH values. 80.12 % nitrate removal was obtained at pH=3, nitrateconcentration = 50 mg/l and adsorbent concentration = 4 g/l.}, keywords = {Nitrate removal,Zeolite,Surface modification,Organo-silane,Adsorption}, url = {https://www.ijnnonline.net/article_22931.html}, eprint = {https://www.ijnnonline.net/article_22931_6473a19ff6d090818921151404510edb.pdf} } @article { author = {Mohammad-Rezaei, R. and Razmi, H.}, title = {Preparation and Characterization of Reduced Graphene Oxide Doped in Sol-Gel Derived Silica for Application in Electrochemical Double-Layer Capacitors}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {233-241}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {In this study, a new graphene ceramic composite (GCC) was prepared based on the reduced grapheneoxide (rGO) doped in sol-gel derived silica. The GCC was prepared by dispersing rGO nanosheets intothe sol-gel precursors containing methyl triethoxysilane, methanol and hydrochloric acid solution.During an acid catalyzed hydrolyze reaction and gelation process, rGO nanosheets were successfullydoped into the prepared gel. The fabricated GCC was characterized by field emission scanning electronmicroscopy, Transmission electron microscopy, Fourier transform infrared spectroscopy, X-raydiffraction, thermogravimetric analysis, cyclic voltammetry and galvanostatic charge/dischargetechniques. According to the electrochemical results, the prepared GCC has shown remarkable specificcapacitance in comparison with carbon ceramic composite. Due to unique configuration of GCC andlarge specific surface area of rGO, the resultant GCC shows specific capacitance of 428 F g-1 at currentdensity of 1 A g-1and good cycling stability using three electrode system.}, keywords = {Graphene,Sol-gel,Double layer capacitor}, url = {https://www.ijnnonline.net/article_22932.html}, eprint = {https://www.ijnnonline.net/article_22932_55d18ba4430bf2da70d8f788185342e1.pdf} } @article { author = {Nazri Husin, M. and Hasni, R. and Arif, N. E.}, title = {Computation on Zagreb Polynomial of Some Families of Dendrimers}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {243-249}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {In mathematical chemistry, a particular attention is given to degree-based graph invariant. The Zagrebpolynomial is one of the degree based polynomials considered in chemical graph theory. A dendrimer isan artificially manufactured or synthesized molecule built up from branched units called monomers. Inthis note, the first, second and third Zagreb polynomials of some nanostar dendrimers are determined.}, keywords = {Zagreb polynomial,Dendrimer,Graph}, url = {https://www.ijnnonline.net/article_22933.html}, eprint = {https://www.ijnnonline.net/article_22933_8af6c4d32df903b3229d91a7ca72162b.pdf} } @article { author = {Ramya, Dodda and Srinivasa Raju, R. and Anand Rao, J. and Rashidi, M. M.}, title = {Boundary layer Viscous Flow of Nanofluids and Heat Transfer Over a Nonlinearly Isothermal Stretching Sheet in the Presence of Heat Generation/Absorption and Slip Boundary Conditions}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {251-268}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {The steady two-dimensional flow of a viscous nanofluid of magnetohydrodynamic (MHD) flow and heattransfer characteristics for the boundary layer flow over a nonlinear stretching sheet is considered. Theflow is caused by a nonlinear stretching sheet with effects of velocity, temperature and concentrationslips. Problem formulation is developed in the presence of heat generation/absorption andsuction/injection parameters on non-linear stretching sheet. The resulting governing equations areconverted into a system of nonlinear ordinary differential equations by applying a suitable similaritytransformation and then solved numerically using Keller-Box technique. Convergences of the derivedsolutions are studied. The effects of the different parameters on the velocity, temperature, andconcentration profiles are shown and discussed. Numerical values of local skin-friction coefficient, localNusselt number and Sherwood number are tabulated. It is found that the velocity profiles decreases,temperature and concentration profiles increases with increasing of velocity slip parameter, and thethermal boundary layer thickness increases with increasing of Brownian motion and thermophoresisparameters.}, keywords = {nanofluid,MHD,Slip effects,Heat generation/absorption,Suction/Injection}, url = {https://www.ijnnonline.net/article_22934.html}, eprint = {https://www.ijnnonline.net/article_22934_7059902416dfb4007dae0ce98b52d580.pdf} } @article { author = {Ayatallahzadeh Shirazi, M. and Shariati, F. and Ramezanpour, Z.}, title = {Toxicity Effects of SiO2 Nanoparticles on Green Micro-Algae Dunaliella Salina}, journal = {International Journal of Nanoscience and Nanotechnology}, volume = {12}, number = {4}, pages = {269-275}, year = {2016}, publisher = {Iranian Nanotechnology Society}, issn = {1735-7004}, eissn = {2423-5911}, doi = {}, abstract = {New extension of nanoparticles used in the last two decades and hence, entrance of them to industrialand non-industrial sewage necessitate study of probable effects of these materials in aquatic ecosystems.This research was performed in order to determine the toxicity effect of silica dioxide (SiO2) nanoparticles on Dunaliella salina green algae in laboratory conditions. SiO2 nanoparticle is one of the bestfull-used nano particles which have application in industries like production of ceramics, plastics, glass,cosmetics, medicine and paper. Dunaliella algae because of having economic value and differentbiochemical composition is used as complements with natural origin in food and pharmacologyindustries. For toxicity determination of this material, the experiment was performed according toO.E.C.D standard method. Experiments on Dunaliella were performed for 72 hours with 7 treatments,two controls and three replicates in each treatment and daily counting of cells in each tube. Countingcell algae population was done by microscope on a Thoma counting slide. For data analysis, probitanalysis, Excel software and SPSS21 were used. The 72 hours NOEC, EC90, EC50 and EC10 werecalculated. The amounts of 72 hours are EC10 =5.37.10-5 , EC50 = 0.169 , EC90 = 512.86, NOEC =1.6×10-2 mg/l. Cell compression noticeably decreased (P < 0.05) by increasing nanoparticleconcentration and silica oxide nanoparticle caused to inhibit growth in Dunaliella species.}, keywords = {Algae Dunaliella salina,EC50,SiO2,Toxicity,nanoparticles,Nanotechnology}, url = {https://www.ijnnonline.net/article_22935.html}, eprint = {https://www.ijnnonline.net/article_22935_52e7c5ec1e1265e30cb10fb81ea3ec62.pdf} }