Development Of CuO/ZnO Nanocomposite Photocatalyst Materials In Reduction Of CO2 To Methanol

Putra, Jonathan Arza (2025) Development Of CuO/ZnO Nanocomposite Photocatalyst Materials In Reduction Of CO2 To Methanol. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material fotokatalis merupakan material yang memiliki kemampuan untuk menginisiasi reaksi kimia dengan menggunakan bantuan cahaya sebagai katalisator, salah satu jenis material fotokatalis yang umum digunakan adalah metal oksida. Penelitian ini bertujuan unutk menganalisis pengaruh komposisi dan temperatur hidrotermal sintesis material komposit CuO/ZnO terhadap aktivitas fotokatalitik CuO/ZnO dalam proses reduksi CO2 menjadi metanol. Pada penelitian ini, CuO yang digunakan disintesis dari prekursor Cu(OAc)₂ dan ZnO yang disintesis dari Zn powder. Proses sintesis CuO melibatkan teknik chemical-precipitation, ZnO menggunakan teknik thermo oxidation process, dan komposit CuO/ZnO menggunakan teknik hidrotermal. Penelitian ini menerapkan variasi rasio komposisi CuO/ZnO yaitu 3:1, 4:1, dan 5:1 dan waktu hidrotermal sintesis komposit CuO/ZnO sebesar 8 jam, 12 jam, dan 16 jam. Material dianalisis menggunakan berbagai teknik karakterisasi, seperti Scanning Electron Microscopy – Energy Dispersive X-Ray (SEM-EDX), Fourier Transform Infra Red (FTIR), X- Ray Diffraction (XRD), UV-Visible Spectroscopy (UV-Vis), Brunauer Emmet Teller (BET), dan Gas Chromatography Mass Spectroscopy (GCMS). Peningkatan komposisi CuO mengakibatkan penurunan ukuran kristal, sementara peningkatan waktu hidrotermal cenderung meningkatkan ukuran kristal. Variasi komposisi menghasilkan ukuran kristal berturut-turut 22,3153 nm, 19,0719 nm, dan 19,0714 nm, sedangkan variasi waktu hidrotermal menghasilkan ukuran kristal 18,4491 nm, 19,0719 nm, dan 38,1780 nm. Aktivitas fotokatalitik nanokomposit ini meningkat seiring dengan peningkatan komposisi CuO dan waktu hidrotermal. Nanokomposit dengan komposisi 5:1 dan waktu hidrotermal 12 jam menunjukkan performa terbaik dalam reduksi CO₂ menjadi metanol, dengan yield mencapai 1.443,007 mmol/gr.cat dan konversi CO₂ sebesar 32,074%.
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Photocatalyst material is a material that has the ability to initiate chemical reactions using light as a catalyst, one type of photocatalyst material that is commonly used is metal oxide. This study aims to analyze the effect of composition and hydrothermal time of CuO/ZnO composite material synthesis on the photocatalytic activity of CuO/ZnO in the process of CO2 reduction to methanol. In this study, CuO used was synthesized from Cu(OAc)₂ precursor and ZnO synthesized from Zn powder. The CuO synthesis process involved chemical-precipitation technique, ZnO using thermo oxidation process technique, and CuO/ZnO composite using hydrothermal technique. This research applied variation of CuO/ZnO composition ratio of 3:1, 4:1, and 5:1 and hydrothermal holding time of CuO/ZnO composite synthesis of 8 hours, 12 hours, and 16 hours. The materials were analyzed using various characterization techniques, such as Scanning Electron Microscopy - Energy Dispersive X-Ray (SEM-EDX), Fourier Transform Infra Red (FTIR), X-Ray Diffraction (XRD), UV-Visible Spectroscopy (UV-Vis), Brunauer Emmet Teller (BET), and Gas Chromatography Mass Spectroscopy (GCMS). An increase in CuO composition results in a decrease in crystal size, while an increase in hydrothermal time tends to increase crystal size. The composition variation produced crystal sizes of 22.32 nm, 19.07 nm, and 19.07 nm, respectively, while the hydrothermal time variation produced crystal sizes of 18.45 nm, 19.07 nm, and 38.18 nm. The photocatalytic activity of these nanocomposites increased along with the increase in CuO composition and hydrothermal time. The nanocomposite with 5:1 composition and 12 h hydrothermal time showed the best performance in the reduction of CO₂ to methanol, with a yield of 1,443.007 mmol/gr.cat and CO₂ conversion of 32.074%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Fotokatalis, Hidrotermal, Metanol, Temperatur, CO2, CuO/ZnO, Hydrothermal, Methanol, Photocatalyst, Temperature
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry > QD115 Electrochemical analysis Q Science > QD Chemistry > QD181.Z6 Zinc oxide Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis
Depositing User:	Jonathan Arza Putra
Date Deposited:	31 Jan 2025 16:40
Last Modified:	31 Jan 2025 16:40
URI:	http://repository.its.ac.id/id/eprint/117307

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