پديد آورنده :
محمودي، عاطفه
عنوان :
بررسي تحليل انشعاب هاپف سه گانه و انشعاب هموكلينيك بلياكف در يك مدل زنجيره غذايي سه مرحله اي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
علوم رياضي - رياضي كاربردي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده علوم رياضي
صفحه شمار :
يازده،92ص.: نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
حميدرضا ظهوري زنگنه
توصيفگر ها :
سيكل حدي , قضيه معدل گيري , ديناميك هاي جمعيتي
تاريخ نمايه سازي :
21/10/93
استاد داور :
محمدرضا رئوفي، رضا مزروعي سبداني
چكيده انگليسي :
89 Synthesis and characterization of bimetallic complexes Co en 3 Dy edta OH2 2 Fe en 3 Dy edta OH2 3 and Ni en 3 Dy edta OH2 2 H2O and their electrocatalytic activity for reduction of H Preparation characterization and magnetic properties of mixed metal oxides nanoparticles Co3O4 Dy2O3 Fe2O3 Dy2O3 and NiO Dy2O3 and their electrocatalytic activity for reduction of CO2 to CO Mozhdeh Hashem m hashem@ch iut ac ir Date of Submission 2014 12 02 Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiH Hadadzadeh Prof hadad@cc iut ac ir F Davar Assistant Prof davar@cc iut ac ir Abstract In this thesis three bimetallic complexes of Dy III with Co II Fe III or Ni II Co en 3 Dy edta OH2 2 Fe en 3 Dy edta OH2 3 and Ni en 3 Dy edta OH2 2 H2O where en ethylenediamine and edta4 ethylenediaminetetraacetato were synthesizedand characterized by elemental analysis FT IR UV Vis and TGA DTA techniques Theelectrocatalytic activity of the bimetallic complexes for reduction of H was investigatedby cyclic voltammetry in sulfuric acid solution The bimetallic complexes were used for preparation of three mixed metal oxidesnanoparticles Co3O4 Dy2O3 Fe2O3 Dy2O3 and NiO Dy2O3 using calcination method atthree different temperatures 500 600 and 800 C The nanoparticles were characterizedby FT IR UV Vis FE SEM and XRD Their particle size is in the range of 10 40 nm Theelectrocatalytic activity of the nanoparticles for electroreduction of CO 2 to CO was alsostudied by cyclic voltammetry in CH3CN In addition the magnetic property of thenanoparticles was investigated by superconductive quantum interface devise SQUID The result show a paramagnetic behaviour for three nanoparticles Key words Mixed metal oxides nanoparticles Dy III complex Co II complex Fe III complex Ni II complex Cyclic voltammetry Electrocatalytic activity Reduction of CO2 Magnetic properties
استاد راهنما :
حميدرضا ظهوري زنگنه
استاد داور :
محمدرضا رئوفي، رضا مزروعي سبداني
