Analisis Pengaruh Variasi Rasio Kation Prekursor Dan Waktu Pemanasan Terhadap Efisiensi Yield Dan Sifat Magnetik Nanopartikel Fe3O4 Dengan Metode Sintesis Kopresipitasi.

Wahfiudin, Aldiansyah (2022) Analisis Pengaruh Variasi Rasio Kation Prekursor Dan Waktu Pemanasan Terhadap Efisiensi Yield Dan Sifat Magnetik Nanopartikel Fe3O4 Dengan Metode Sintesis Kopresipitasi. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 02511840000004-Undergraduate_Thesis.pdf Restricted to Repository staff only Download (4MB)

Abstract

Aplikasi nanomaterial dari hari ke hari semakin luas. Salah satu produk teknologi nanomaterial ialah superparamagnetic iron oxide nanoparticles (SPIONs) yang pemanfaatannya untuk terapi medis, pengolahan limbah, separasi magnetik, dan sebagainya. Sintesis SPIONs khususnya Fe3O4 masih terbilang relatif mahal. Oleh karena itu dilakukan penelitian mengenai preparasi SPIONs menggunakan pasir besi yang banyak tersedia di alam serta metode preparasi co-precipitation yang terbilang simpel. Perbandingan molar antar prekursornya sangatlah krusial untuk menghasilkan SPIONs dalam bentuk magnetit. Prekursor FeCl2 sangatlah mudah teroksidasi menjadi FeCl3 yang mana merupakan prekursor pasangannya sehingga rasionya berubah. Terdapat tiga variasi perbandingan antara volume FeCl2 dan FeCl3 yang digunakan yaitu 1:1,5, 1:2, 1:2,5. Untuk menghasilkan nanopartikel yang kecil dan homogen, diperlukan inhibitor pertumbuhan kristal seperti dietilamin yang nantinya dihilangkan dengan cara memanaskannya menggunakan oven. Terdapat dua variasi lama waktu pemanasan yang dilakukan untuk mengetahui pengaruhnya terhadap sifat magnetik SPIONs yang dihasilkan yaitu 1 dan 3 jam. Karakterisasi dilakukan menggunakan XRD, FTIR, SEM, dan VSM. Massa hasil sintesis juga dibandingkan secara teori terhadap hasil massa di lapangan. Analisis XRD menunjukkan bahwa SPIONs yang dihasilkan berupa Fe3O4 atau magnetit dengan ukuran kristalit 11,99 hingga 14,74 nanometer. Hasil FTIR juga menunjukkan tidak adanya gugus fungsi lain selain fingerprint Fe3O4 dengan absorbsi pada gelombang 570 dan 400 cm-1. Pencitraan dari SEM menunjukkan morfologi partikel spherical serta adanya aglomerasi pada hasil SPIONs yang dihasilkan dengan ukuran partikel 25,45 hingga 30,36 nanometer. Hasil VSM menunjukkan bahwa partikel oksida besi memiliki sifat superparamagnet dengan saturasi magnetisasi tertinggi senilai 51,75 emu/g yang dimiliki oleh variasi 1:1,5 yang dipanaskan selama 1 jam dan saturasi magnetisasi paling rendah senilai 44,63 emu/g milik variasi 1:2,5 yang dipanaskan selama 3 jam. Dari perhitungan dan perbandingan massa didapati bahwa penggunaan variasi penyangga dapat meningkatkan yield sebesar 15,1%.
===================================================================================================================================
Nanomaterial’s applications are getting broader each and every day. One example of a product of nanomaterial technology is superparamagnetic iron oxide nanoparticles (SPIONs) which applications are for medical therapy, wastewater treatment, magnetic separation, etc. Nowadays, the synthesis of SPIONs especially Fe3O4 is still largely expensive. This research is about SPIONs’ synthesis using natural iron sand as its raw material that is widely available in the nature with co-precipitation as the synthesis method due to its simplicity. The molar ratio of the precursors is deemed very crucial to produce magnetite SPIONs. Because FeCl2 is readily oxidated into FeCl3 which coincidentally is the other paiir of the precursor thus the shifting of the ratio. This research used three molar ratio variation of FeCl2 and FeCl3. They are 1:1,5, 1:2, and 1:2,5. To produce small and homogen nanoparticles, there is a need of using some crystal growth inhibitor such as diethylamine which in later stage needs to be removed by heating it in an oven. The heating time is also used as a variable in this research to examine its effect to the magnetic properties of the SPIONs. The variations are 1 hour and 3 hours. The characterization used are XRD, FTIR, SEM, and VSM. The masses of the synthesis’ yield are compared to the theoretical calculations. XRD analysis showed that the SPIONs produced are indeed magnetite iron oxide which crystallite size ranging from 11,99 to 14,74 nanometres. FTIR used to check whether or not the diethylamine is gone and the spectra showed that there were no identification of any diethylamine left. The absorbtion band in the FTIR spectra showed the Fe3O4’s fingerprint at 570 and 400 cm-1 wavenumber. SEM imaging showed spherical particles which are also agglomerated due to lack of surfactants. The particle size obtained by SEM imaging are ranging from 25,45 to 30,36 nanometres. VSM showed that the iron oxide synthesized are having superparamagnetic properties with highest magnetic saturation obtained is 51,75 emu/g for the 1:1,5 variation that was dried for 1 hour and the lowest magnetic saturation obtained is 44,63 emu/g for the 1:2,5 variation that was dried for 3 hours. From the mass calculation and comparison, there was a 15,1% increase in yield due to the use of molar ratio variation buffer.

Item Type:	Thesis (Other)
Additional Information:	RSMt 620.5 Wah a-1 2022
Uncontrolled Keywords:	Co-precipitation, Fe3O4, SPIONs, Superparamagnet. Co-precipitation, Fe3O4, SPIONs, Superparamagnet.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	18 May 2026 01:16
Last Modified:	18 May 2026 01:16
URI:	http://repository.its.ac.id/id/eprint/133197

Actions (login required)

View Item