Fitriah, Nurul (2023) Sintesis dan Karakterisasi Aluminosilikat Mesopori Menggunakan Dual Template Cetyltrimethylammonium Bromide - Lerak (Sapindus Rarak) : Pengaruh Waktu Hidrotermal. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sintesis aluminosilikat mesopori menggunakan dua kombinasi templat cetyltrimethylammonium bromide (CTAB) dan lerak telah berhasil dilakukan. Sintesis aluminosilikat mesopori dilakukan dengan metode hidrotermal menggunakan metakaolin dan prekursor Ludox sebagai sumber silika dan alumina. Proses hidrotermal dilakukan pada suhu 100 °C dengan variasi waktu hidrotermal 24, 48, dan 72 jam. Hasil analisis XRD (X-ray Diffraction) sudut panjang menunjukkan gundukan lebar pada 2θ sekitar 15-30° yang mengindikasikan fase amorf, dengan intensitas puncak yang meningkat seiring dengan lama waktu hidrotermal. Spektrum FTIR (Fourier Transform Infrared) menunjukkan puncak serapan pada bilangan gelombang 1095 cm-1 dan 966 cm-1 yang masing-masing menunjukkan vibrasi dari Si-O-Si dan Si-OH sebagai spektra karakteristik material aluminosilikat mesopori. Morfologi dari SEM (Scanning Electron Microscopy) menunjukkan pembentukan aglomerasi yang lebih jelas seiring dengan lamanya waktu hidrotermal. Analisis termografi TGA/DTG menunjukkan tiga tahap penurunan massa. Profil adsorpsi-desorpsi nitrogen menunjukkan isoterm adsorpsi tipe IV yang mengindikasikan terbentuknya mesopori. Luas permukaan (SBET), luas permukaan mesopori (SMeso), dan volume mesopori terbesar diperoleh pada sampel aluminosilikat mesopori dual templat dengan waktu hidrotermal 24 jam yaitu sebesar 283,97 m2/g, 229,79 m2/g, dan 0,643 cm3/g. Hal ini menunjukkan bahwa waktu hidrotermal memengaruhi intensitas, luas permukaan, dan pori-pori dari sampel aluminosilikat mesopori
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Synthesis of mesoporous aluminosilicate using two template combinations CTAB and lerak has been successfully carried out. In this study mesoporous aluminosilicate was synthesized by hydrothermal method using metakaolin and Ludox precursor as a source of silica and alumina. The hydrothermal process was carried out at 100 °C with variations in hydrothermal time of 24, 48 and 72 hours. The wide angle XRD (X-ray diffraction) analysis results show a wide mound at 2θ around 15-30° indicating the existance of an amorphous phase, with peak intensity increasing with the length of hydrothermal time. The FTIR (Fourier Transform Infrared) spectrum shows absorption peaks at wave numbers 1095 cm-1 and 966 cm-1 which indicate vibrations of Si-O-Si and Si-OH as characteristic spectra of mesoporous aluminosilicate materials, respectively. The morphology of the SEM shows the formation of agglomeration which is clearer with the length of hydrothermal time. TGA/DTG thermographic analysis showed three stages of mass loss. The nitrogen adsorption-desorption profile shows an isotherm of adsorption type IV which indicates the formation of mesoporous. The largest surface area (SBET), mesoporous surface area (SMeso) and mesoporous volume were obtained in dual template mesoporous aluminosilicate samples with a hydrothermal time of 24 hours, namely 283.97 m2/g, 229,79 m2/g, and 0,643 cm3/g. This shows that the hydrothermal time affects the intensity, surface area, and pores of the mesoporous aluminosilicate sample.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Aluminosilikat mesopori, CTAB, Lerak, Templat, Waktu Hidrotermal, Mesoporous Aluminosilicate, CTAB, Lerak, Template, Hydrothermal Time |
| Subjects: | Q Science > QD Chemistry > QD181.S6 A4 Aluminum silicates Q Science > QD Chemistry > QD501 Catalysis. Catalysts. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Nurul Fitriah |
| Date Deposited: | 08 Aug 2023 00:54 |
| Last Modified: | 08 Aug 2023 00:54 |
| URI: | http://repository.its.ac.id/id/eprint/103750 |
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