Mahardika, Arza Ajeng (2024) Sintesis Dan Karakterisasi Komposit TiO2/g-C3N4 Berpori/Zsm-5 Hierarki Sebagai Fotokatalis Untuk Meningkatkan Fotodegradasi Metilen Biru. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pembentukan heterojunction antara dua material semikonduktor merupakan strategi yang menjanjikan untuk meningkatkan aktivitas fotokatalitik material komposit fotokatalis. Pada penelitian ini, partikel TiO2 ditempelkan pada permukaan g-C3N4 berpori, menghasilkan TiO2/g-C3N4 berpori. TiO2/g-C3N4 berpori selanjutnya juga dikompositkan dengan ZSM-5 hierarki, membentuk material komposit TiO2/g-C3N4 berpori/ZSM-5 hierarki. Analisis dengan XRD, FTIR, dan FESEM menunjukkan adanya kontak yang intens dan interaksi yang kuat antara komponen TiO2, g-C3N4 berpori, dan ZSM-5 hierarki. Pemetaan unsur dengan EDX mengonfirmasi persebaran unsur TiO2 pada permukaan komposit, khususnya pada g-C3N4 berpori. Keberadaan ZSM-5 hierarki yang meningkatkan luas permukaan material komposit dikonfirmasi dengan uji adsorpsi-desorpsi N2. Sementara itu, analisis dengan spekrofotometri fotoluminesensi (PL) mengindikasikan bahwa laju rekombinasi pembawa muatan (elektron dan hole) dapat ditekan akibat adanya heterojunction antara TiO2 dan g-C3N4 berpori. Analisis terhadap posisi energi pita konduksi dan pita valensi mengindikasikan terjadinya heterojunction skema-Z pada material ini. Pengujian aktivitas katalitik terhadap fotodegradasi metilena biru (MB) menunjukkan jika komposit TiO2/g-C3N4 berpori/ZSM-5 hierarki memiliki aktivitas fotokatalitik tertinggi dibandingkan dengan material dasarnya. Peningkatan aktivitas ini dapat dikaitkan dengan semakin meningkatnya luas permukaan komposit akibat keberadaan ZSM-5 hierarki serta heterojunction yang terbentuk antara TiO2/g-C3N4 berpori.
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Formation of a heterojunction between two semiconductor materials is a promising strategy to enhance the photocatalytic activity of photocatalyst composite materials. In this research, TiO2 particles were attached to the surface of porous g-C3N4, producing TiO2/porous g-C3N4. TiO2/porous g-C3N4 was then also composited with hierarchy ZSM-5, forming the TiO2/porous g-C3N4/hierarchy ZSM-5 composite material. Analysis using XRD, FTIR, and FESEM shows the intense contact and strong interaction between the TiO2, porous g-C3N4, and hierarchy ZSM-5 components. Elemental mapping using EDX confirmed the distribution of the TiO2 particles on the composite surface, specifically on porous g-C3N4. The role of hierarchy ZSM-5 which increases the surface area of the composite material was confirmed by N2 adsorption-desorption measurement. Meanwhile, analysis using photoliminescence (PL) specrophotometry indicated that the recombination rate of charge carriers (elektron and hole) can be suppressed due to the heterojunction between TiO2 and porous g-C3N4. The analysis of the energy positions of the conduction band and valence band indicates the occurrence of Z-scheme heterojunction in this material. Catalytic activity test on methylene blue (MB) photodegradation shows that the TiO2/porous g-C3N4/hierarchy ZSM-5 composite has the highest photocatalytic activity compared to the base material. The enhanced photocatalytic activity can be attributed to the increasing surface area of the composite due to the presence of ZSM-5 and the heterojunction formed between TiO2/porous g-C3N4.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | transfer muatan, fotokatalitik, karbon nitrida, titanium dioksida, ZSM-5 hierarki |
| Subjects: | Q Science > QD Chemistry > QD716 Photocatalysis. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Arza Ajeng Mahardika |
| Date Deposited: | 12 Aug 2024 02:39 |
| Last Modified: | 12 Aug 2024 02:39 |
| URI: | http://repository.its.ac.id/id/eprint/113484 |
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