8420

7801

كارشناسي ارشد

ماده چگال

اصفهان: دانشگاه صنعتي اصفهان، دانشكده فيزيك

1392

[چهارده]، 78ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

هادي سلامتي

حسين احمدوند

25/10/92

پرويز كاملي، اسماعيل عبدالحسيني

فيزيك

ID7801

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

79 Investigation Structural and magnetic properties of Fe3O4 ferrite and its application to treatment of industrial water pollution Sajede Narimani s narimanizamanabadi@ph iut ac ir 2013 09 20 Department of physics Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr HadiSalamati salamati@cc iut ac irAbstractIn this study nanoparticles powder of magnetite Fe3O4 which has spinel structure are synthesized bycoprecipitation method In the first section nanoparticles of ferric ferrite have been prepared in thedifferent condition such as precipitate agent of NaOH or NH4OH temperature pH and argon atmosphere Then in all the synthesized samples the structure and magnetic properties of the samples has beenstudied by using various tools such as X ray diffraction XRD Furier Transform Infrared FTIR thermogravimetry TG vibrating sample magnetometer VSM and Field Emission Scanning ElectronMicroscope FESEM The raw materials used in the first section include iron chloride iron sulfate NaOH NH4OH and deionized water At first nanoparticles were synthesized by precipitation agentNaOH But because of the VSM analysis showed that the saturation magnetization of the sample was low so the nanoparticles were synthesized with precipitate agent NH4OH that it had high saturationmagnetization about 83 of magnetization of bulk sample but not superparamagnetic Consequently inorder to make s superparamagnetic magnetite nanoparticles pH and temperature of the sample waschanged As a result of this work nanoparticles with smaller size superparamagnetic and high saturationmagnetization about 86 of magnetization of bulk sample was made In the second section of thisstudy for the application of nanoparticles in industry on two of superparamagnetic nanoparticles withdifferent particle sizes coating the artichokes with using the APTES interface was placed This sectionalsothe structural properties of the samples were investigatedby using thermal analysis TG X raydiffraction analysis infrared spectroscopy FTIR and field emission scanning electron microscope FESEM and then to study the uptake of heavy metals from industrial contaminated water the testingwas done using ICP OES Results show that with the placement of these coatings on the magnetitenanoparticles the nanoparticle size is reduced and also nanoparticle agglomerates mode dramaticallydecreases In addition the results of the ICP OES tests show that whatever the cover on the CSnanoparticles is higher the absorption increases and can be used this cover for removing metals such aschromium manganese and nickel Keywords superparamagnetic magnetite heavy metals artichokes APTES

هادي سلامتي

حسين احمدوند

پرويز كاملي، اسماعيل عبدالحسيني