Pengaruh Loading ZnO Pada Komposit ZnO/Aluminosilikat Terhadap Dekolorisasi Malachite Green

Nugraheny, Alivia Pristila (2025) Pengaruh Loading ZnO Pada Komposit ZnO/Aluminosilikat Terhadap Dekolorisasi Malachite Green. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

ZnO telah disintesis pada support aluminosilikat mesopori (AS) untuk mengetahui pengaruh loading ZnO serta kinetika reaksinya dalam dekolorisasi zat warna Malachite Green. ZnO disintesis pada aluminosilikat yang selanjutnya disebut sebagai komposit ZnO/AS. ZnO pada aluminosilikat disintesis dengan metode impregnasi dengan memvariasikan loading ZnO sebesar 10, 20, dan 30% menggunakan prekursor Zn(CH3COO)2.2H2O dengan massa aluminosilikat sebanyak 0,3 g. Karakterisasi XRD, FTIR, adsorpsi-desorpsi N2, UV-DRS, dan FESEM-EDX dilakukan untuk mengetahui karakter material hasil sintesis. Komposit diuji untuk mendekolorisasi zat warna Malachite Green dengan variasi waktu kontak, dosis katalis, dan konsentrasi zat warna. Aluminosilikat mesopori hasil sintesis memiliki luas permukaan BET sebesar 132,67 m2/g dengan rata-rata diameter pori 35,39 nm dan volume pori 0,47 cm3/g. Karakterisasi XRD menunjukkan adanya puncak ZnO dengan ketajaman yang berbeda. Puncak vibrasi Zn-O pada komposit tidak terlihat di spektra FTIR. Katalis dengan loading ZnO 10, 20, dan 30% memiliki nilai band gap sebesar 3,19; 3.12; dan 3,1 eV. FESEM-EDX menunjukkan adanya partikel dengan morfologi bulat. Persen dekolorisasi maksimum ditunjukkan oleh katalis 30ZnO/AS yakni sebesar 97,30% dengan dosis katalis 5 mg, konsentrasi 40 ppm, dan waktu kontak 120 menit. Laju fotokatalitik tertinggi diperoleh paling sering dengan penggunaan katalis 30ZnO/AS. Hal ini menandakan bahwa terdapat pengaruh loading ZnO pada komposit ZnO/AS terhadap dekolorisasi Malachite Green. Reaksi dekolorisasi fotokatalitik Malachite Green mengikuti kinetika Langmuir-Hinshelwood dengan laju reaksi orde pertama semu.
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ZnO has been synthesized on mesoporous aluminosilicate support to determine the effect of ZnO loading and its reaction kinetics in Malachite Green dye decolorization. ZnO was synthesized on aluminosilicate which is hereinafter referred to as composite. ZnO on aluminosilicate was synthesized by impregnation method by varying ZnO loading of 10, 20, and 30% using Zn(CH3COO)2.2H2O precursor with aluminosilicate mass of 0.3 g. XRD, FTIR, N2 adsorption-desorption, UV-DRS, and FESEM-EDX characterizations were performed to determine the character of the synthesized material. The composites were tested to decolorize Malachite Green dye with variations in contact time, catalyst dosage, and dye concentration. The synthesized mesoporous aluminosilicate has a BET surface area of 132.67 m2/g with an average pore diameter of 35.39 nm and a pore volume of 0.47 cm3/g. XRD characterization showed the presence of ZnO peaks with different sharpness. The Zn-O vibrational peak in the composite is not visible in the FTIR spectra. Catalyst with ZnO loading 10, 20, and 30% has a band gap value of 3.19; 3.12; and 3.1 eV. FESEM-EDX showed the presence of particles with spherical morphology. The maximum percent decolorization was shown by 30ZnO/AS catalyst which was 97.30% with 5 mg catalyst dosage, 40 ppm concentration, and 120 minutes contact time. The highest photocatalytic rate was obtained most often with the use of 30ZnO/AS catalyst. This indicates that there is an effect of ZnO loading on the ZnO/AS composite towards Malachite Green decolorization. The photocatalytic decolorization reaction of Malachite Green follows Langmuir-Hinshelwood kinetics with a pseudo first-order reaction rate.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	aluminosilikat mesopori, dekkolorisasi, Malachite Green, ZnO mesoporous aluminosilicate, decolorization, Malachite Green, ZnO
Subjects:	Q Science > QD Chemistry > QD181.Z6 Zinc oxide Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Natural Science > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Alivia Pristila Nugraheny
Date Deposited:	05 Aug 2025 01:32
Last Modified:	05 Aug 2025 01:32
URI:	http://repository.its.ac.id/id/eprint/126922

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