Sintesis Komposit MCM-41/HKUST-1 serta Kinerjanya sebagai Adsorben Methylene Blue dan Congo Red dalam Air

Sulistiono, Dety Oktavia (2018) Sintesis Komposit MCM-41/HKUST-1 serta Kinerjanya sebagai Adsorben Methylene Blue dan Congo Red dalam Air. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

HKUST-1 dan komposit MCM-41/HKUST-1 dengan variasi penambahan massa MCM-41 terhadap massa HKUST-1 sebesar 3,5; 7 dan 14% berhasil disintesis dengan metode solvotermal dalam campuran pelarut dimetilformamida (DMF) : etanol : air (1 : 1 : 1) pada suhu 100 °C selama 10 jam. Pola difraktogram HKUST-1 dan komposit hasil sintesis, yang berturut-turut dinotasikan sebagai MC(3.5)/HKUST-1, MC(7)/HKUST-1 dan MC(14)/HKUST-1, menunjukkan puncak karakteristik pada 2θ sekitar 6,69; 9,46; 11,61 dan 13,41° yang sesuai dengan pola difraktogram HKUST-1 standar. Spektra FTIR padatan hasil sintesis menunjukkan pita serapan pada bilangan gelombang yang sama dengan HKUST-1 yang telah dilaporkan. Morfologi permukaan HKUST-1 dan komposit MCM-41/HKUST-1 hasil sintesis memiliki bentuk oktahedral, yang karakteristik untuk HKUST-1 standar. Data adsorpsi-desorpsi N2 menunjukkan bahwa luas permukaan spesifik MC(7)/HKUST-1 dan MC(14)/HKUST-1 berturut-turut 743,7 dan 686,1 m2/g lebih kecil dari HKUST-1 (784,1 m2/g). Akan tetapi, stabilitas termal MC(14)/HKUST-1 mencapai 302 °C, lebih tinggi dari HKUST-1 (292 °C). Hasil pengukuran kapasitas adsorpsi komposit terhadap zat warna methylene blue (MB) dan congo red (CR) dalam air menunjukkan bahwa MC(14)/HKUST-1 memiliki kapasitas adsorpsi tertinggi sebesar 334,82 mg/g terhadap MB dan 894,83 mg/g terhadap CR, serta mengikuti kinetika adsorpsi orde dua semu dan isotermal adsorpsi Langmuir, terhadap kedua adsorbat. =========== HKUST-1 and MCM-41/HKUST-1 composites have been synthesized by solvothermal method at 100 °C for 10 hours, using solvent mixture of dimethylformamide (DMF), ethanol and water with volume ratio of 1:1:1. The amount of MCM-41 added during the synthesis process was varied at 3.5, 7 and 14% toward the mass of HKUST-1, and the obtained composites were notated as MC(3.5)/HKUST-1, MC(7)/HKUST-1 and MC(14)/HKUST-1, respectively. Diffractogram patterns of the obtained solids showed characteristic peaks at 2θ of 6.69, 9.46, 11.61 and 13.41°, similar to that of reported HKUST-1. Furthermore, FTIR spectra of all solids showed absorption bands at the same wavenumbers as reported for HKUST-1. Images from Scanning Electrone Microscope (SEM) showed that surface morphology of HKUST-1 and the composites dominated by octahedral shape. The results of adsorption-desorption N2 showed that specific surface area the composites were lower than that of HKUST-1. The thermal stability of the composites, however, reached 302 °C, higher than that of HKUST-1 (292 °C). Performance of the composites as adsorbent was studied for the removal of methylene blue (MB) and congo red (CR) in aqueous solutions. It was found that the MC(14)/HKUST-1 composite had highest adsorption capacity toward MB (334,82 mg/g) and CR (894,83 mg/g), as well as followed a kinetic adsorption model of pseudo-second order and a Langmuir isotherm adsorption for both adsorbates.

Item Type: Thesis (Undergraduate)
Additional Information: RSKi 620.118 Sul s
Uncontrolled Keywords: HKUST-1; MCM-41; Adsorpsi; Methylene blue; Congo red; Kapasitas Adsorpsi; Adsorption; Methylene blue; Congo red; Adsorption capacity
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Natural Science > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User: Dety Oktavia Sulistiono
Date Deposited: 29 Jan 2018 07:33
Last Modified: 16 Sep 2020 07:35
URI: https://repository.its.ac.id/id/eprint/50886

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