6359

391 دكتري

دكتري

شيمي آلي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1390

بيست و سه،235ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهران غياثي

شادپور ملك پور

29/8/90

حميدرضا معماريان،شهرام تنگستاني نژاد، امير عبدالملكي، حسن حدادزاده

شيمي

ID391 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

231Synthesis characterization and catalytic activity of nanocatalysts of Mn III Co II and Fe II immobilized onto a nanosized SiO2 Al2O3 mixed oxide modified with Schiff base ligands in oxidation reaction of ethylbenzene by TBHP in solvent free and supercritical CO2 media and study of theirelectrochemical behavior and application as the nano sensores for biologicalmaterials and nano adsorebents for organic and heavy metals pollutions from aqueous solution Mohammad Arshadi E Mail m arshadi@ch iut ac ir September 30 2011 Department of Chemistry Isfahan University of Technology 84156 83111 Isfahan IranSupervisor Professor Mehran Ghiaci E Mail address mghiaci@cc iut ac irAdvisor Dr S Mallakpour Department Graduate Program Coordinator Professor Bijan Najafi Department of Chemistry Isfahan University of Technology Isfahan 84156 83111 Iran Tel 98 311 3912369 Fax 98 311 3912350Abstract Nanosized SiO2 Al2O3 mixed oxide was functionalized with 3 aminopropyl triethoxysilane 3 APTES and 2 aminoethyl 3 aminopropyl trimethoxysilane 2 AE 3 APTMS groups The resulting modified nanosizedSiO2 Al2O3 mixed oxides were further functionalized with three different Schiff base groups followed bycomplexation with Mn OAc 2 and Co OAc 2 and ferrocenecarboxaldehyde to afford the corresponding immobilizedMn Co and Fe heterogeneous catalysts The synthesized materials were characterized by FT IR spectroscopy UV vis CHN elemental analysis ICP MS EPR SEM and TEM The catalytic activities of the heterogenized Mn andCo catalysts were studied in the oxidation of ethylbenzene without the need of any solvent at 80 C using tert butylhydroperoxide as oxygen source Si Al pr NH et N methyl 2 pyridylketone Co had high catalytic activity andselectivity to acetophenone 99 and could be reused at least 4 times without significant loss in activity However heterogeneous Schiff base ligands were evaluated for the removal of Cd II and Pb II from aqueous solutions Inaddition this research reports on the application of cereal ashes from barley oat triticale and wheat grains asadsorbents for the removal of several organic pollutants benzene phenol tetrachloroethylene and toluene Theorder of adsorption found for benzene and toluene on ashes was barley oat triticale wheat whereas for phenoland tetrachloroethylene it was wheat triticale oat barley The Freundlich isotherm model has been applied tothe equilibrium adsorption data In the other section of this thesis ZSM 5 zeolite was synthesized with different Si Al molar ratios andliquid phase nitration of phenol over a solid acid catalyst ZSM 5 zeolite was investigated by nitric acid 60 under various solvent and temperature conditions The performance of the nitration in ortho and para positions ofphenol is suggested to derive from the amount of catalyst and the solvent effects In continuation of this thesis for the first time we described application of the nonmaterial such asmultiwall carbon nanotubes MWCNTs for modification of carbon paste electrode as a working electrode inpresence of nanoparticles manganase and immobilized ferrocene mediators Furthermore we studiedelectrochemical behavior of these modified electrodes in aqueous buffer solution using cyclic voltammetry CV chronoamperometry CA and electrochemical impedance spectroscopy EIS We used these modified electrodesfor determination of Cu II ion captopril and penicillamine Keywords Mn nanocatalyst Co nanocatalyst Ethylbenzene Acetophenone Oxidation Nanosized SiO2 Al2O3 ferrocene nitration ZSM 5 zeolite phenol heterogeneous Schiff base ligand Cereal Ashes heavy metals organicpollution Electrochemical sensors Multiwall carbon nanotubes modified Voltammetric method

مهران غياثي

شادپور ملك پور

حميدرضا معماريان،شهرام تنگستاني نژاد، امير عبدالملكي، حسن حدادزاده