Simanungkalit, Mauli Ayunita Boru (2021) Sintesis dan Karakterisasi Fotokatalis Heterojunction MOx/WS2 (M=Ti, Zn) untuk Produksi Hidrogen. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 02311740000045-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
02311740000045-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2023. Download (8MB) | Request a copy |
Abstract
Kebutuhan sumber energi ramah lingkungan khususnya energi hidrogen semakin meningkat. Hidrogen dapat diproduksi melalui beragam metode, salah satu metodenya yang bebas emisi ialah fotokatalisis. Di antara material yang telah diteliti sebagai fotokatalis, partikel nano logam oksida (MOx) seperti TiO2 dan ZnO merupakan fotokatalis yang sangat umum digunakan. Meskipun demikian, keduanya hanya dapat menyerap 4-8% dari spektrum cahaya matahari. Oleh karena itu, pada penelitian ini digunakan WS2 untuk meningkatkan performa TiO2 dan ZnO pada rentang cahaya tampak. Pada penelitian ini penggabungan struktur WS2-MOx dilakukan dengan variasi konsentrasi mol WS2 0,05%, 0,10%, 0,15%, dan 0,3%. Analisis difraksi sinar-X menunjukkan bahwa preparasi WS2-MOx membentuk strutur partikel nanokomposit heterojunction. Berdasarkan citra SEM (Scanning Electron Microscope) partikel nano TiO2 teraglomerasi dan membentuk patahan sedangkan partikel nano ZnO berbentuk mikrosfer, serta WS2 terlihat menempel pada permukaan masing masing MOx. Penggabungan struktur WS2-MOX juga memperluas penyerapan cahaya pada spektrum cahaya seiring dengan peningkatan konsentrasi mol WS2. Aktivitas fotokatalisis WS2-MOx diuji melalui pendekatan sistem fotoelektrokimia 3 elektroda dengan moda Linear Sweep Voltammetry (LSV). Performa fotokatalisis WS2-TiO2 meningkat seiring dengan peningkatan konsentrasi mol WS2, sedangkan pada WS2-ZnO konsentrasi mol optimal untuk fotokatalis ada pada 0,1% WS2.
=====================================================================================================
The increasing demand of renewable energy led to the growth of hydrogen as energy source. Among various methods to produce hydrogen, photocatalysis is the zero-emission method that developed continuously as the catalyst material. Nanoparticles of metal oxide TiO2 and ZnO are the most commonly used photocatalysts, although they only cover 4-8% of the spectrum of sunlight. Therefore, here WS2 is used to improve the performance of TiO2 and ZnO in the visible light range. In this study, the incorporation of the WS2-MOx structure was carried out with various WS2 mole concentrations of 0.05%, 0.10%, 0.15%, and 0.3%. X-ray diffraction analysis showed that the WS2-MOx preparation formed a heterojunction nanocomposite particle structure. Scanning electron microscopy (SEM) images show that TiO2 nanoparticles agglomerated and formed fractures shape while ZnO nanoparticles is microspheres, and WS2 were stuck onto the surface of each MOx. The incorporation of the WS2-MOx structure also expands the light absorption in the light spectrum as the mole concentration of WS2 increases. The photocatalytic activity of WS2-MOx was tested using a 3-electrode photoelectrochemical system approach with Linear Sweep Voltammetry (LSV) mode. The performance of WS2-TiO2 photocatalyst increased by increasing the mole concentration of WS2, while in WS2-ZnO the optimal mole concentration for photocatalyst was at 0.1% WS2.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Hidrogen, Hydrogen, Fotokatalisis, Photocatalysis, TiO2, ZnO, WS2, Heterojunction |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Mauli Ayunita Boru Simanungkalit |
| Date Deposited: | 24 Aug 2021 12:05 |
| Last Modified: | 24 Aug 2021 12:05 |
| URI: | http://repository.its.ac.id/id/eprint/89150 |
Actions (login required)
 |
View Item |