Analisis Pengaruh Temperatur Hidrotermal Sintesis Material Komposit rGO/Fe2O3 terhadap Aktivitas Fotokatalitik Reduksi CO2

Putra, Jonathan Arza (2024) Analisis Pengaruh Temperatur Hidrotermal Sintesis Material Komposit rGO/Fe2O3 terhadap Aktivitas Fotokatalitik Reduksi CO2. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material fotokatalis memiliki kemampuan untuk memicu reaksi kimia dengan memanfaatkan cahaya sebagai katalisator, salah satu jenis material fotokatalis adalah metal oksida. Penelitian ini mengeksplorasi pengaruh temperatur hidrotermal sintesis komposit rGO/Fe2O3 terhadap aktivitas fotokatalitik rGO/Fe2O3 dalam proses reduksi CO2. Penelitian ini menggunakan Fe2O3 yang diperoleh dari prekursor FeCl3, dan rGO yang dihasilkan dari serbuk grafit. Proses sintesis Fe2O3 melibatkan metode hidrotermal, sementara rGO dibuat dengan metode hummer dan komposit rGO/Fe2O3 dilakukan dengan metode hidrotermal. Penelitian ini menerapkan variasi temperatur hidrotermal komposit rGO/Fe2O3 pada 180°C, 200°C, dan 220°C dengan durasi 12 jam. Material dianalisis menggunakan berbagai teknik karakterisasi seperti SEM-EDX, FTIR, XRD, UV-Vis, CV, EIS, dan GCMS. Hasilnya, peningkatan temperatur sintesis hidrotermal material komposit rGO/Fe2O3 memberikan pengaruh terhadap struktur dan morfologi yaitu peningkatan ukuran kristal karena aglomerasi serta peningkatan keteraturan pada material. Ukuran kristal yang diperoleh berturut-turut 40,456 nm, 57,167 nm, dan 82,877 nm untuk setiap variasi temperatur hidrotermal. Material komposit yang disintesis berjenis semikonduktor didukung melalui pengujian EIS dengan konduktivitas pada 10-2 Hz sebesar 0.02513 S/m. Peningkatan temperatur sintesis hidrotermal material komposit rGO/Fe2O3 tidak memberikan pengaruh positif terhadap aktivitas fotokatalitik reduksi CO2, karena dengan peningkatan temperatur sintesis tidak dihasilkan senyawa kimia hasil reduksi CO2. Hal ini disebabkan karena peningkatan temperatur hidrotermal menurunkan komposisi rGO sehingga memperkecil peluang terjadinya migrasi elektron dalam proses fotokatalitik dan potensial reduksi yang tidak memadai. Dibuktikan dengan pengujian GCMS, di mana senyawa kimia yang terbentuk hanya pada temperatur sintesis hidrotermal terkecil 180°C dengan produk 1-Butanol sehingga hasil terbaik diperoleh pada variasi tersebut.
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Photocatalyst materials have the ability to trigger chemical reactions by using light as a catalyst, one type of photocatalyst material is metal oxide. This research explores the effect of hydrothermal temperature of rGO/Fe2O3 composite synthesis on the photocatalytic activity of rGO/Fe2O3 in the CO2 reduction process. This research uses Fe2O3 which is obtained from the precursor FeCl3, and rGO which is produced from graphite powder. The Fe2O3 synthesis process involves the hydrothermal method, while rGO is made using the hummer method and the rGO/Fe2O3 composite is made using the hydrothermal method. This research applies variations in the hydrothermal temperature of the rGO/Fe2O3 composite at 180°C, 200°C, and 220°C with a duration of 12 hours. Materials were analyzed using various characterization techniques such as SEM-EDX, FTIR, XRD, UV-Vis, CV, EIS, and GCMS. As a result, increasing the hydrothermal synthesis temperature of the rGO/Fe2O3 composite material has an influence on the structure and morphology, namely increasing the crystal size due to agglomeration and increasing the order of the material. The crystal sizes obtained were respectively 40,456 nm, 57,167 nm, and 82,877 nm for each variation of hydrothermal temperature. The synthesized composite material is a semiconductor type supported by EIS testing with a conductivity at 10-2 Hz of 0.02513 S/m. Increasing the hydrothermal synthesis temperature of the rGO/Fe2O3 composite material does not have a positive effect on the photocatalytic activity of CO2 reduction, because by increasing the synthesis temperature no chemical compounds resulting from CO2 reduction are produced. This is because increasing the hydrothermal temperature reduces the composition of rGO, thereby reducing the opportunity for electron migration in the photocatalytic process and inadequate reduction potential. Proven by GCMS testing, where chemical compounds were formed only at the smallest hydrothermal synthesis temperature of 180°C with the 1-Butanol product so that the best results were obtained in this variation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CO2, Hummer, Hydrothermal, Photocatalyst, rGO/Fe2O3, Temperature, CO2, Fotokatalis, Hummer, Hidrotermal, rGO/Fe2O3, Temperatur
Subjects:	Q Science > QD Chemistry > QD716 Photocatalysis.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Jonathan Arza Putra
Date Deposited:	05 Feb 2024 03:28
Last Modified:	05 Feb 2024 03:28
URI:	http://repository.its.ac.id/id/eprint/106062

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