Investigasi Pengaruh Dietilamin Dan Temperatur Annealing Pada Sintesis Partikel Fe3O4 Terhadap Morfologi, Luas Permukaan, Dan Sifat Magnetik Menggunakan Metode Kopresipitasi

Kurniawan, Jeffry (2022) Investigasi Pengaruh Dietilamin Dan Temperatur Annealing Pada Sintesis Partikel Fe3O4 Terhadap Morfologi, Luas Permukaan, Dan Sifat Magnetik Menggunakan Metode Kopresipitasi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sintesis nanopartikel Fe3O4 dari pasir besi alam menggunakan metode kopresipitasi berhasil dilakukan dengan variasi penambahan DA dan temperatur annealing. Eksperimen dilakukan dengan menyiapkan larutan FeCl3 dari pasir besi alam dan larutan FeCl2 dari steelwool menggunakan HCl. DA ditambahkan sebelum proses netralisasi dengan variasi 0%, 15%, dan 30% (v/v). Endapan dicuci dan di-anneal pada temperatur 100 oC dan 150oC untuk mendapatkan serbuk Fe3O4. Selanjutnya serbuk diuji menggunakan instrumen XRD menunjukkan pattern Fe3O4 berdasarkan JCPDS 02-1035. Pengujian EDX menunjukkan kandungan Fe3O4 mampu mencapai 99.14% dengan sedikit pengotor. Spektrum infrared dari pengujian FTIR menunjukkan sampel hanya memiliki ikatan Fe-O yang berasal dari Fe3O4. Ukuran kristal serbuk diestimasi berdasarkan hasil XRD menunjukkan ukuran kristal dalam kisaran 16.49 – 22.26 nm. Berdasarkan hasil SEM ukuran partikel menurun dan menghasilkan artikel single domain setelah penambahan DA yaitu dibawah 80 nm dengan bentuk partikel spheres-like. Kenaikan temperatur annealing cenderung meningkatkan ukuran partikel. Pengujian DLS menunjukkan partikel teraglomerasi setelah proses annealing yang disebabkan oleh hilangnya DA. Luas permukaan spesifik meningkat dengan penambahan DA konsisten dengan penurunan ukuran partikelnya. Sedangkan, kenaikan temperatur annealing cenderung menurunkan nilai luas permukaan spesifik seiring dengan meningkatnya ukuran partikel. Nilai luas permukaan spesifik berada pada rentang 61.024 – 110.098 m2 /g. Selanjutnya, sifat magnetik berhasil diselidiki dengan mengukur magnetisasi saturasi sampel. Penambahan DA mampu meningkatkan nilai saturation magnetization mencapai 52.49 emu/g. Selain itu rasio remanence magnetization terhadap saturation magnetization terkecil dihasilkan oleh fraksi volume DA 30% yang menunjukkan eksistensi DA mengarah pada pembentukan artikel
superparamagnetic
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The synthesis of Fe3O4 nanoparticles from natural iron sand using the coprecipitation method was successfully carried out with variations in the addition of DA and annealing temperature. Experiments were carried out by preparing a solution of FeCl3 from natural iron sand and a solution of FeCl2 from steelwool using HCl. DA was added before the neutralization process with variations of 0%, 15%, and 30% (v/v). The precipitate was washed and annealed at temperatures of 100 oC and 150 oC to obtain Fe3O4 powder. Furthermore, the powder was tested using an XRD instrument showing the Fe3O4 pattern based on JCPDS 02-1035. The EDX test showed that the Fe3O4 content was able to reach 99.14% with a small amount of impurities. The infrared spectrum from the FTIR test showed that the sample only had Fe-O bonds derived from Fe3O4. The crystal size of the powder was estimated based on the XRD results showing the crystal size in the range of 16.49 – 22.26 nm. Based on the results of SEM the particle size decreased and produced single domain particles after the addition of DA which was below 80 nm with spheres-like particle shape. The increase in annealing temperature tends to increase the particle size. The DLS test showed that the particles agglomerated after the annealing process caused by the loss of DA. The specific surface area increases with the addition of DA consistent with the decrease in particle size. Meanwhile, the increase in annealing temperature tends to decrease the value of the specific surface area along with the increase in particle size. Specific surface area values are in the range of 61,024 – 110,098 m2/g. Furthermore, the magnetic properties were successfully investigated by measuring the saturation magnetization of the sample. The addition of DA was able to increase the saturation magnetization value to 52.49 emu/g. In addition, the smallest ratio of remanence magnetization to saturation magnetization is produced by the volume fraction of 30% DA which indicates the existence of DA leads to the formation of superparamagnetic particles

Item Type:	Thesis (Other)
Additional Information:	RSMt 620.5 Kur i-1 2022
Uncontrolled Keywords:	Fe3O4, MNPs, DA, kopresipitas, coprecipitation
Subjects:	T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	10 Feb 2025 05:42
Last Modified:	10 Feb 2025 05:42
URI:	http://repository.its.ac.id/id/eprint/118591

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