Sintesis Komposit MCM-41/ZIF-67 serta Kinerjanya Sebagai Adsorben Methyl Orange dalam Air

Elfianuari, Pramita (2018) Sintesis Komposit MCM-41/ZIF-67 serta Kinerjanya Sebagai Adsorben Methyl Orange dalam Air. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

ZIF-67 dan komposit MCM-41/ZIF-67 dengan variasi penambahan massa MCM-41 terhadap massa ZIF-67 sebesar 2,5; 5 dan 10% berhasil disintesis dengan pelarut air pada suhu ruang. Pola difraktogram ZIF-67 dan komposit hasil sintesis, yang berturut-turut dinotasikan sebagai MC(2,5)/ZIF-67, MC(5)/ZIF-67 dan MC(10)/ZIF-67, menunjukkan puncak karakteristik pada 2θ sekitar 7,32; 10,36; 12,69; 14,66 dan 16,40° yang sesuai dengan pola difraktogram ZIF-67 standar. Spektra FTIR padatan hasil sintesis menunjukkan pita serapan pada bilangan gelombang yang sama dengan ZIF-67 referensi. Morfologi permukaan ZIF-67 dan komposit MCM-41/ ZIF-67 hasil sintesis memiliki bentuk kubus, yang karakteristik untuk ZIF-67 standar. Data adsorpsi-desorpsi N2 menunjukkan bahwa luas permukaan spesifik ZIF-67 dan MC(5)/ZIF-67 berturut-turut 1079,2 dan 1011,2 m2/g, lebih kecil dari MC(10)/ZIF-67 (1250,6 m2/g). Akan tetapi, stabilitas termal MC(10)/ZIF-67 mencapai 357 °C, lebih tinggi dari ZIF-67 (325 °C). Hasil pengukuran kapasitas adsorpsi komposit terhadap zat warna methyl orange (MO) dalam air menunjukkan bahwa MC(5)/ZIF-67 memiliki kapasitas adsorpsi tertinggi sebesar 167,635 mg/g, serta mengikuti kinetika adsorpsi orde dua semu dan isotermal adsorpsi Langmuir. =========== ZIF-67 and MCM-41/ ZIF-67 composites have been synthesized using water as solvent at room temperature. The amount of MCM-41 added during the synthesis process was varied at 2.5, 5 and 10% toward the mass of ZIF-67, and the obtained composites were notated as MC(2,5)/ZIF-67, MC(5)/ZIF-67 and MC(10)/ZIF-67, respectively. Difractogram patterns of the obtained solids showed characteristic peaks at 2θ of 7.32, 10.36, 12.69, 14.66 and 16,40°, similar to that of reported ZIF-67. Furthermore, FTIR spectra of all solids showed absorption bands at the same wavenumbers as reported for ZIF-67. Images from Scanning Electron Microscope (SEM) showed that surface morphology of ZIF-67 and the composites dominated by cubic shape. The results of adsorption-desorption N2 showed that specific surface area of ZIF-67 and MC(5)/ZIF-67 were 1079.2 and 1011.2 m2/g, respectively, lower than that of ZIF-67 (1250.6 m2/g). The thermal stability of the MC(10)/ZIF-67, however, reached 357 °C, higher than that of ZIF-67 (325 °C). Performance of the composites as adsorbent was studied for the removal of methyl orange (MO) in aqueous solutions. It was found that the MC(5)/ZIF-67 composite had highest adsorption capacity toward MO (167,635 mg/g), as well as followed a kinetic adsorption model of pseudo-second order and a Langmuir isotherm adsorption.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: ZIF-67; MCM-41; Komposit; Adsorpsi; Methyl Orange; composite; adsorption; methyl orange
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry > QD117 Absorption
Q Science > QD Chemistry > QD502 Chemical kinetics
T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions: Faculty of Mathematics and Science > Chemistry > (S1) Undergraduate Theses
Depositing User: Elfianuari Pramita
Date Deposited: 29 Jan 2018 08:08
Last Modified: 29 Jan 2018 08:08
URI: http://repository.its.ac.id/id/eprint/50884

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