Sintesis Komposit Zeolit-Y/ZnO@g-C3N4 Sebagai Filler Pada Membran Nanofiber Berbasis Poliakrilonitril Untuk Degradasi Metilen Biru

Arroyo, Muetia Fitria (2026) Sintesis Komposit Zeolit-Y/ZnO@g-C3N4 Sebagai Filler Pada Membran Nanofiber Berbasis Poliakrilonitril Untuk Degradasi Metilen Biru. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Metilen biru merupakan zat warna kationik non-azo yang memiliki cincin fenotiazin, yaitu cincin aromatik heterosiklik dengan atom nitrogen dan sulfur. Zat warna ini bersifat beracun, karsinogenik, dan menyebabkan pencemaran lingkungan. Untuk itu, limbah perairan yang tercemar perlu diolah menggunakan teknologi pemurnian air. Teknologi adsorpsi merupakan pemurnian air konvensional yang menangkap polutan (adsorbat) pada permukaan material berpori (adsorben). Zeolit-Y merupakan material berpori yang umum digunakan sebagai adsorben. Namun, material ini terbatas untuk menangkap polutan dan bersifat reversibel. Menanggapi hal tersebut, zeolit-Y perlu dikombinasikan dengan material fotokatalis yang dapat mengurai polutan menjadi senyawa sederhana. Komposit zeolit-Y/ZnO@g-C3N4 merupakan material yang menggabungkan kemampuan adsorpsi dan fotokatalitik dalam satu sistem, sehingga memungkinkan untuk menangkap dan mengurai polutan. Meski begitu, material dalam bentuk serbuk dapat tersuspensi dalam larutan, sehingga berpotensi menjadi polutan sekunder. Menanggapi permasalahan tersebut, komposit zeolit-Y/ZnO@g-C3N4 perlu ditambahkan ke dalam matriks polimer yang tidak mudah tersuspensi di dalam larutan. Pada penelitian ini, komposit zeolit-Y/ZnO@g-C3N4 disintesis dan dikarakterisasi dengan XRD, FTIR, FESEM-EDX, dan UV-Vis DRS. Berikutnya, komposit ditambahkan ke dalam membran nanofiber berbasis polimer poliakrilonitril (PAN) dengan variasi 10, 15, dan 20 %b terhadap massa PAN. Membran nanofiber PAN/zeolit-Y/ZnO@g-C3N4 difabrikasi menggunakan elektrospinning dan dikarakterisasi dengan XRD, FTIR, dan FESEM-EDX. Kinerja degradasi membran nanofiber dikaji melalui uji degradasi metilen biru. Uji degradasi metilen biru dilakukan secara bertahap, mulai dari uji reaksi gelap selama 1 jam dan dilanjutkan uji reaksi terang di bawah lampu UV selama 10 jam. Berdasarkan hasil uji yang diperoleh, membran nanofiber PAN/zeolit-Y/ZnO@g-C3N4 dengan variasi penambahan 20 %b mampu mengurangi konsentrasi serta mendegradasi metilen biru sebesar 95,53% dan 85,90% secara berurutan. Kinerja ini diperoleh melalui reaksi berbasis model kinetika reaksi orde 1 dengan konstanta laju reaksi sebesar 0,1931 jam⁻¹.
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Methylene blue is a cationic non-azo dye characterized by a phenothiazine ring, a heterocyclic aromatic system containing nitrogen and sulfur atoms. This dye is toxic and environmentally persistent, posing a risk of water pollution. Consequently, contaminated aqueous waste requires treatment through water purification technologies. Adsorption represents a conventional purification approach in which pollutants (adsorbates) are captured on the surface of porous materials (adsorbents). Zeolite-Y is a porous material widely employed as an adsorbent; however, its pollutant uptake is limited and inherently reversible. To address this limitation, zeolite-Y can be combined with a photocatalytic material capable of decomposing pollutants into simpler compounds. The zeolite-Y/ZnO@g-C₃N₄ composite integrates adsorptive and photocatalytic functions within a single system, enabling simultaneous capture and decomposition of pollutants. Nevertheless, powdered materials tend to remain suspended in solution and may act as secondary pollutants. To overcome this drawback, the zeolite-Y/ZnO@g-C₃N₄ composite was incorporated into a polymer matrix that resists suspension in aqueous media. In this study, the zeolite-Y/ZnO@g-C₃N₄ composite was synthesized and characterized by XRD, FTIR, FESEM-EDX, and UV-Vis DRS. The composite was subsequently incorporated into polyacrylonitrile (PAN)-based nanofiber membranes at loadings of 10, 15, and 20 wt% relative to the PAN mass. The PAN/zeolite-Y/ZnO@g-C₃N₄ nanofiber membranes were fabricated via electrospinning and characterized by XRD, FTIR, and FESEM-EDX. The degradation performance of the nanofiber membranes was evaluated through methylene blue degradation tests, conducted sequentially with a 1 h dark reaction followed by a 10 h light reaction under UV irradiation. The results show that the PAN/zeolite-Y/ZnO@g-C₃N₄ nanofiber membrane containing 20 wt% composite reduced the methylene blue concentration by 95.53% and degraded 85.90% of the dye. This performance follows a first-order kinetic model with a rate constant of 0.1931 h⁻¹.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Membran Fotokatalitik, Metilen Biru, Nanofiber, PAN, Zeolit-Y/ZnO@g-C3N4. Methylene Blue, Nanofiber, PAN, Photocatalytic Membrane, Zeolite-Y/ZnO@g-C₃N₄.
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry Q Science > QD Chemistry > QD181.Z6 Zinc oxide Q Science > QD Chemistry > QD716 Photocatalysis. T Technology > TP Chemical technology > TP159.M4 Membranes (Technology) T Technology > TP Chemical technology > TP159.M6 Zeolites
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Muetia Fitria Arroyo
Date Deposited:	31 Jul 2026 03:00
Last Modified:	31 Jul 2026 03:00
URI:	http://repository.its.ac.id/id/eprint/140446

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