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SUMMARY
SINTESA NANOPARTIKEL MAGNETIK DENGAN METODE ELEKTROKIMIA
SYNTHESIS OF MAGNETIC NANOPARTICLES
USING ELECTROCHEMICAL METHOD
Created by WAHYU RAHARJO ; ENDIK SENTOSA
Subject : Elektrokimia
Subject Alt : Chemical engineering
Keyword : : elektrokimia ; nanopartikel magnetik; X-Ray
Diffraction; Scanning Electron Microscopy
Description :
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 mol/L pada rapat arus 0.167 A/dm2
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 /A/cm2,100 /A/cm2 dan
130 /A/cm2 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. Darihasil analisa
XRD dan SEMpada variabel yang telah ditentukan, hasil terbaik
produk Fe3O4 didapat pada kondisi pH 7,
suhu 30 C dan rapat arus 70 ^A/cm2. Jadi dapat disimpulkan
karakteristik partikel Fe3O4 dipengaruhi oleh kondisi pH,
suhu larutan elektrolit dan rapat arus yang digunakan.
Description Alt:
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 A/dm2 for 6 hours.
Then, the electroplated was functioned as anode in the next
experiment that was used to produce Fe3O4 particles. Usingdeionized
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 /A/cm2.
Contributor : Dr. Ir. Heru Setyawan, M.Eng.
Date Create : 21/12/2009
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Type : Text
Format : pdf
Language : Indonesian
Identifier : ITS-Undergraduate-3100009035650
Collection : 3100009035650
Call Number : RSK 660.297 8 Rah s
Source : Undergraduate Theses, Chemical Engineering, RSK 660.297
8 Rah s, 2009
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