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ITS » Undergraduate Theses » Teknik Kimia
Posted by aguss at 21/12/2009 12:15:19  •  3712 Views


SINTESA NANOPARTIKEL MAGNETIK DENGAN METODE ELEKTROKIMIA

SYNTHESIS OF MAGNETIC NANOPARTICLES USING ELECTROCHEMICAL METHOD

Author :
WAHYU RAHARJO ; ENDIK SENTOSA ( 3100009035650 )




ABSTRAK

Tujuan penelitian ini adalah membuat nanopartikel magnetik Fe3O4 dengan metode elektrokimia dan mengevaluasi pengaruh kondisi operasi pH suhu dan rapat arus terhadap karakteristik partikel. Proses sintesa nanopartikel magnetik Fe3O4 ini diawali dengan elektroplating besi dalam larutan elektrolit FeSO4 0.072 molL pada rapat arus 0.167 Adm2 selama 6 jam. Kemudian elektroda besi yang telah mengalami proses elektroplating tersebut dipakai untuk proses elektrokimia pada sintesa Fe3O4. Dengan menggunakan air demin sebagai elektrolit proses elektrolisa untuk sintesa Fe3O4 dilakukan selama 12 jam. Untuk mendapatkan hasil yang terbaik percobaan dilakukan dengan memvariasikan suhu larutan elektrolit pH dan rapat arus yang mengalir dalam sel. Untuk variabel pH digunakan pH 7 9 dan 11 variabel suhu larutan adalah suhu 30 40 dan 50 C sedangkan variabel rapat arus adalah 70 Acm2100 Acm2 dan 130 Acm2 dan untuk variabel pH digunakan pH 7 9 dan 11. Partikel Fe3O4 yang dihasilkan masih tercampur dengan larutan elektrolit sehingga harus dipisahkan untuk selanjutnya dianalisa dengan metode XRD X-Ray Diffraction dan SEM Scanning Electron Microscopy. Dalam percobaan ini juga dilakukan pengukuran verpotensial untuk mengetahui pengaruh arus terhadap reaksi elektroda yang terjadi di batas fase. Metode elektrokimia dengan bahan yang sederhana mampu menghasilkan partikel Fe3O4 meskipun diiringi dengan terbentuknya sedikit senyawa lain yaitu Fe3O4. Dari hasil analisa XRD dan SEMpada variabel yang telah ditentukan hasil terbaik produk Fe3O4 didapat pada kondisi pH 7 suhu 30 C dan rapat arus 70 Acm2. Jadi dapat disimpulkan karakteristik partikel Fe3O4 dipengaruhi oleh kondisi pH suhu larutan elektrolit dan rapat arus yang digunakan.


ABSTRACT

he main objectives of this research are to synthesize of magnetic nanoparticles using electrochemical method and to evaluate the effect of operating conditions on particles characteristics. The anode was prepared by electroplating iron plate FeSO4 solution with current density of 0.167 Adm2 for 6 hours. Then the electroplated was functioned as anode in the next experiment that was used to produce Fe3O4 particles. Using deionized water as an electrolyte electrolysis process for synthesizing of Fe3O4 was performed for 12 hours. To get the best result experiments were performed with using various parameters such as temperature pH and current density. Particle produced that were dispersed in the solution were then separated and dried. The dried particles were characterized by X-ray Diffraction and Scanning Electron Microscopy. In these experiments Overpotential was also measured to know the effect of electric current on the electrode reaction occured at the interface. Electrochemical method with simple route can produce Fe3O4 particles although there was a little formation impurities such as Fe3O4 and tend to form agglomerate. From the result of XRD and SEM analysis at hose variables showed that the best result of Fe3O4 particles were obtained at pH 7 temperature of 30 C and under current density of 70 Acm2.



Keywordselektrokimia ; nanopartikel magnetik; X-Ray Diffraction; Scanning Electron Microscopy
 
Subject:  Elektrokimia
Contributor
  1. Dr. Ir. Heru Setyawan, M.Eng.
Date Create: 21/12/2009
Type: Text
Format: pdf
Language: Indonesian
Identifier: ITS-Undergraduate-3100009035650
Collection ID: 3100009035650
Call Number: RSK 660.297 8 Rah s


Source
Undergraduate Theses, Chemical Engineering, RSK 660.297 8 Rah s, 2009

Coverage
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Rights
Copyright @2009 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library




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  1.  ITS-Undergraduate-6367-2304100083-abstract_id.pdf - 462 KB
  2.  ITS-Undergraduate-6367-2304100083-abstract_en.pdf - 426 KB




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