Putri, Salsabila Aulia Rahma (2025) Sintesis Material Komposit Cu2O-g-C3N4/ZMS-5 untuk Aplikasi Fotokatalisis: Produksi Hidrogen dan Degradasi Metilen Biru. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Teknologi produksi H2 melalui metode fotokatalitik menjadi solusi untuk energi bersih dan berkelanjutan, sekaligus dapat mendegradasi polutan organik dalam lingkungan air. Metode fotokatalitik ini mengubah energi cahaya menjadi energi kimiawi yang dapat menghasilkan hidrogen dan degradasi bahan organik seperti metilen biru. Penelitian ini bertujuan untuk mengetahui rasio optimal serta kontribusi Cu2O dan komposit g-C3N4/ZSM-5 sebagai fotokatalis dalam aplikasi produksi hidrogen dan degradasi MB. Pembentukan heterojunction pada komposit Cu2O-g-C3N4/ZSM-5 (CGZ) berhasil dikembangkan untuk aplikasi ganda, yaitu produksi hidrogen sebagai energi terbarukan dan degradasi metilen biru dalam pengolahan limbah. Tahapan sintesis diawali dari preparasi Cu2O dan g-C3N4/ZSM-5. Komposit Cu2O-g-C3N4/ZSM-5 dibuat dengan berbagai variasi komposisi Cu2O : g-C3N4/ZSM-5, yaitu 1:1. 1:2, dan 2:1. Hasil sintesis berhasil membentuk p-n heterojunction yang dikonfirmasi melalui karakterisasi XRD, FTIR, FESEM-EDX, adsorpsi-desorpsi N2 (BET-BJH), dan UV-DRS. Pola difraksi XRD menunjukkan pola kristalinitas material Cu2O, g-C3N4, dan ZSM-5 dalam komposit sesuai data penelitian sebelumnya. Pada data FTIR ditunjukkan adanya ikatan kimia yang mengonfirmasi terbentuknya komposit CGZ. Analisis FESEM-EDX menunjukkan morfologi dan pemetaan material pada komposit CGZ, dimana Cu2O terdispersi merata pada permukaan g-C3N4/ZSM-5. Selain itu, ditunjukkan struktur morfologi Cu2O berbentuk kubik dan g-C3N4 berupa lapisan halus. Data BET menunjukkan luas permukaan sebesar 125,597 m2/g. Distribusi ukuran pori diperoleh melalui analisis BJH, didapatkan data ukuran pori dan volume pori rata-rata sebesar 1,902 nm dan 0,082 cm3/g. Hasil karakterisasi UV-DRS menunjukkan pergeseran celah pita komposit CGZ. Komposisi CGZ 1:1, 1:2, dan 2:1 masing-masing memiliki Eg sebesar 1,9; 2,5; dan 1,8 eV. Pada uji produksi hidrogen tertinggi dimiliki oleh komposit CGZ 2:1 dengan konsentrasi H2 sebesar 172 ppm. Hasil produksi hidrogen tertinggi diperoleh dari komposit dengan komposisi Cu2O yang lebih tinggi. Sementara uji fotodegradasi menggunakan 50 mL MB 20 ppm selama 150 menit di bawah penyinaran sinar UV menghasilkan efisiensi degradasi tertinggi pada komposisi CGZ 1:2 sebesar 19,6%. Sebaliknya, hasil uji degradasi MB tertinggi diperoleh dari komposit dengan komposisi g-C3N4/ZSM-5 yang lebih tinggi. Berdasarkan data hasil penelitian ini disimpulkan bahwa fotokatalis CGZ dapat berperan dalam aplikasi bidang energi dan lingkungan. Namun, optimasi metode sintesis dan komposisi material perlu dikaji kembali untuk meningkatkan aktivitas fotokatalitik komposit CGZ
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Hydrogen production technology through photocatalytic methods is a solution for clean and sustainable energy, while at the same time being able to degrade organic pollutants in the water environment. This photocatalytic method converts light energy into chemical energy which can produce hydrogen and degradation of organic materials such as blue methylene. This study aims to determine the optimal ratio and contribution of Cu2O and g-C3N4/ZSM-5 composites as photocatalysts in hydrogen production and MB degradation applications. The formation of heterojunctions in Cu2O-g-C3N4/ZSM-5 (CGZ) composites has been successfully developed for dual applications, namely the production of hydrogen as a renewable energy and the degradation of blue methylene in waste treatment. The synthesis stage begins with the preparation of Cu2O and g-C3N4/ZSM-5. Cu2O-g-C3N4/ZSM-5 composites are made with various variations of Cu2O composition: g-C3N4/ZSM-5, which is 1:1. 1:2, and 2:1. The synthesis results succeeded in forming a p-n heterojunction which was confirmed through the characterization of XRD, FTIR, FESEM-EDX, adsorption-desorption N2 (BET-BJH), and UV-DRS. XRD diffraction patterns show crystallinity patterns of Cu2O, g-C3N4, and ZSM-5 materials in composites according to previous research data. From the FTIR data, it is shown that there is a chemical bond that confirms the formation of CGZ composites. FESEM-EDX analysis showed the morphology and material mapping of CGZ composites, where Cu2O was evenly dispersed on the surface of g-C3N4/ZSM-5. In addition, it was shown that the morphological structure of Cu2O was cubic and g-C3N4 was in the form of a fine layer. BET data shows a surface area of 125,597 m2/g. The distribution of pore size was obtained through BJH analysis, the average pore size and pore volume data were obtained at 1.902 nm and 0.082 cm3/g. The results of UV-DRS characterization show a shift in the gap of the CGZ composite band. The CGZ composition of 1:1, 1:2, and 2:1 each has an Eg of 1.9; 2,5; and 1.8 eV. In the test, the highest hydrogen production was owned by CGZ 2:1 composite with an H2 concentration of 172 ppm. The highest hydrogen production yield is obtained from composites with a higher Cu2O composition. Meanwhile, the photodegradation test using 50 mL MB 20 ppm for 150 minutes under UV irradiation resulted in the highest degradation efficiency in the CGZ 1:2 composition of 19.6%. In contrast, the highest MB degradation test results were obtained from composites with higher g-C3N4/ZSM-5 compositions. From this study, it is concluded that CGZ photocatalysts can play a role in energy and environmental applications. However, the optimization of synthesis methods and material composition needs to be reviewed to increase the photocatalytic activity of CGZ composites.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | fotokatalitik, grafit karbon nitrida, hetojunction, semikonduktor, tembaga(I) oksida photocatalysis, graphic carbon nitride, hetrojunction, semiconductor, copper(I) oxide |
| Subjects: | Q Science > QD Chemistry > QD716 Photocatalysis. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Salsabila Aulia Rahma Putri |
| Date Deposited: | 04 Feb 2025 08:37 |
| Last Modified: | 04 Feb 2025 08:37 |
| URI: | http://repository.its.ac.id/id/eprint/118149 |
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