STUDI dan ANALISIS (STRUKTUR, MORFOLOGI, dan, SIFAT OPTIK) NANOPARTIKEL Al2O3 HASIL BIOSINTESIS MENGGUNAKAN EKSTRAK DAUN CENGKEH (SYZYGIUM AROMATICUM)

NATASYA FRYSILIA WARDANNI, . (2024) STUDI dan ANALISIS (STRUKTUR, MORFOLOGI, dan, SIFAT OPTIK) NANOPARTIKEL Al2O3 HASIL BIOSINTESIS MENGGUNAKAN EKSTRAK DAUN CENGKEH (SYZYGIUM AROMATICUM). Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Telah dilakukan biosintesis nanopartikel Al2O3 menggunakan ekstrak daun cengkeh (Syzygium aromaticum) dengan melarutkan 7 gr aluminium nitrat nonahidrat [Al(NO3)3.9H2O] ke dalam 28 ml ekstrak cair daun cengkeh pada suhu 70°C selama 30 menit dengan menambahkan NaOH untuk memvariasikan pH 9, pH 10, dan pH 11. Sampel Al2O3 di annealing pada suhu 450°C selama 1 jam dan diperoleh serbuk nanopartikel Al2O3. Nanopartikel Al2O3 dikarakterisasi menggunakan X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), dan UV-Vis Spektrophotometer. Hasil uji XRD berdasarkan Inorganic Crystal Structure Database (ICSD) nomor #98-009-4485 nanaopartikel menunjukkan struktur kristal ortorombik dengan space group Pna21. Ukuran kristalit nanopartikel Al2O3 mengecil ketika nilai pH semakin tinggi. Pada pH 9, pH 10, dan pH 11 masing-masing memiliki nilai ukuran kristalit sebesar 37.36 nm, 15.47 nm, dan 12.52 nm. Morfologi nanopartikel Al2O3 memiliki bentuk hampir bulat, homogen, dan memiliki ukuran yang kurang seragam. Hasil uji EDX mengidentifikasi bahan yang disintesis adalah Al2O3. Nilai puncak reflektansi nanopartikel Al2O3 berada pada panjang gelombang 328-336 nm dan memiliki nilai band gap berada pada 2.74 – 2.76 eV. Kata kunci. Nanopartikel Al2O3, Ukuran Kristalit, Struktur Kristal, Morfologi, Sifat Optik ***** Al2O3 nanoparticles were biosynthesized using clove leaf extract (Syzygium aromaticum) by dissolving 7 g of aluminum nitrate nonahydrate [Al(NO3)3.9H2O] into 28 ml of liquid extract of clove leaves at 70°C for 30 minutes by adding NaOH to vary pH 9, pH 10, and pH 11. Al2O3 samples were annealed at 450°C for 1 hour and Al2O3 nanoparticle powder was obtained. Al2O3 nanoparticles were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX), and UV-Vis Spectrophotometer. XRD test results based on Inorganic Crystal Structure Database (ICSD) number #98-009-4485 nanaoparticles show an orthorhombic crystal structure with space group Pna21. The crystallite size of Al2O3 nanoparticles decreases when the pH value gets higher. At pH 9, pH 10, and pH 11 each has a crystallite size value of 37.36 nm, 15.47 nm, and 12.52 nm. The morphology of Al2O3 nanoparticles has an almost round shape, homogeneous, and has a less uniform size. EDX test results identified the synthesized material as Al2O3. The peak reflectance value of Al2O3 nanoparticles is at a wavelength of 328-336 nm and has a band gap value of 2.74 - 2.76 eV. Keywords. Al2O3 Nanoparticles, Crystallite Size, Crystal Structure, Morphology, Optical Properties

Item Type:	Thesis (Sarjana)
Additional Information:	1) Dr. Anggara Budi Susila, M.Si 2) Prof. Dr. Iwan SUgihartono, M.Si
Subjects:	Sains > Fisika
Divisions:	FMIPA > S1 Fisika
Depositing User:	Users 25180 not found.
Date Deposited:	16 Aug 2024 01:29
Last Modified:	16 Aug 2024 01:29
URI:	http://repository.unj.ac.id/id/eprint/49406

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