Analisis Pengaruh Variasi Pelarut Basa pada Sintesis CuO Terhadap Aktivitas Fotokatalitik CNCs/ZIF-8/CuO untuk Mereduksi CO2

Sugiharto, Rochman (2026) Analisis Pengaruh Variasi Pelarut Basa pada Sintesis CuO Terhadap Aktivitas Fotokatalitik CNCs/ZIF-8/CuO untuk Mereduksi CO2. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Permasalahan emisi karbon dioksida (CO2) global yang mencapai 422,8 ppm pada 2024 mendorong pengembangan teknologi fotokatalitik sebagai upaya konversi CO₂ menjadi senyawa bernilai. Karenanya, penelitian ini berfokus pada fabrikasi komposit CNCs (Cellulose Nanocrystals), ZIF-8 (Zeolite immidazole Framework), dan CuO (Tembaga II Oksida) dengan variasi pelarut basa KOH, MEA (Monoethanolamine), dan MEA/KOH. CNCs berperan sebagai agen adsorpsi CO₂, ZIF-8 sebagai penyedia luas permukaan dan situs aktif, serta CuO berperan sebagai material aktif utama dengan bandgap rendah. Karakterisasi FTIR, XRD, SEM, UV–Vis, dan GC-MS dilakukan untuk mengevaluasi karakteristik serta kinerja fotokatalitik. Hasil menunjukkan perbedaan pelarut memengaruhi morfologi dan aktifitas fotokatalitik. Penggunaan basa kuat (KOH) membentuk partikel kecil teraglomerasi, sedangkan penggunaan basa lemah (MEA) membentuk lembaran pendek (flake-like) dengan aglomerasi terkontrol, adapun kombinasi MEA/KOH menunjukkan morfologi peralihan berupa lempengan (plate-like). Variasi CuO turut berpengaruh terhadap aktivitas fotokatalitik CNCs/ZIF-8/CuO, penggunaan pelarut MEA berperan sebagai agen fungsionalisasi permukaan mendorong pembentukan produk alkohol seperti etanol dan metanol, adapun stabilitas morfologi yang terbentuk berpengaruh terhadap ukuran kristal, nilai celah pita dan peningkatan yield produk yang diperoleh. Didapati penurunan ukuran kristal menunjukkan semakin tinggi nilai produk hasil reduksi yang dihasilkan, hal ini di didorong oleh peningkatan luasan situs aktif pada morfologi yang tidak teraglomerasi. Didapati ukuran kristal komposit dengan pelarut KOH, MEA, dan MEA/KOH sebesar 19,29, 14,71, dan 16,35 nm dengan total yield produk sebesar 33,857, 124,88, dan 119,726 mmol/g.kat
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The global carbon dioxide (CO₂) emissions problem, which reached 422.8 ppm in 2024, has driven the development of photocatalytic technology as an effort to convert CO₂ into valuable compounds. Therefore, this study focuses on the fabrication of CNCs (Cellulose Nanocrystals), ZIF-8 (Zeolite imidazole Framework), and CuO (Copper II Oxide) composites with variations in KOH, MEA (Monoethanolamine), and MEA/KOH base solvents. CNCs act as CO₂ adsorption agents, ZIF-8 as a provider of surface area and active sites, and CuO as the main active material with a low bandgap. FTIR, XRD, SEM, UV–Vis, and GC-MS characterizations were performed to evaluate the characteristics and photocatalytic performance. The results show that solvent variation affects morphology and photocatalytic activity. The use of a strong base (KOH) forms small agglomerated particles, while the use of a weak base (MEA) forms short flake-like sheets with controlled agglomeration. The MEA/KOH combination shows a transitional morphology in the form of plate-like sheets. CuO variation also affects the photocatalytic activity of CNCs/ZIF-8/CuO. The use of MEA solvent acts as a surface functionalization agent, promoting the formation of alcohol products such as ethanol and methanol. The stability of the formed morphology affects crystal size, band gap value, and increased product yield. It was found that a decrease in crystal size indicates a higher value of the reduction product produced, which is driven by an increase in the area of active sites in the non-agglomerated morphology. The crystal sizes of the composites with KOH, MEA, and MEA/KOH solvents were 19.29, 14.71, and 16.35 nm with total product yields of 33.857, 33.857, and 119.726 mmol/g.kat.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CNCs/ZIF-8/CuO, CO2, Fotoreduksi, Pelarut, Photoreduction, Solvent
Subjects:	Q Science > QD Chemistry > QD117 Absorption Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Rochman Sugiharto
Date Deposited:	23 Jan 2026 01:21
Last Modified:	23 Jan 2026 01:21
URI:	http://repository.its.ac.id/id/eprint/130144

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