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All Journal Spektra: Jurnal Fisika dan Aplikasinya PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Tiam, Tan Swee
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Aerospace Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Other

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SYNTHESIS AND CHARACTERIZATION ANALYSIS OF FE3O4/SiO2 CORE SHELL Cassia, Diva; Sugihartono, Iwan; Isnaeni, Isnaeni; Soewoto, Haswi Purwandanu; Alaih, Akhmad Futukhillah Fataba; Triyono, Djoko; Mohar, Rahmat Setiawan; Tiam, Tan Swee
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 3 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 3, December 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.083.04

Abstract

Fe3O4/SiO2 core shell synthesis has been carried out, and its characteristics has been analyzed to be used as a photocatalyst using co-precipitation and sol-gel method. Fe3O4 is used as the core material to eliminate the difficulty of separating the photocatalyst powder from the solution medium, SiO2 is used to avoid oxidation by preventing the Fe3O4 core from coming into direct contact with the solution. The samples were then characterized using X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), and Vibrating Sample Magnetometer (VSM). The XRD and FTIR results showed that the crystal structure and movement of the sample molecules matched the standard characteristics from previous studies. The VSM characterization results show that SiO2 succeeded in reducing the value of the magnetization of Fe3O4, which proves that Fe3O4 has been successfully coated by SiO2.
ANALISIS STRUKTUR KRISTAL DAN ABSORBANSI LAPISAN TIPIS ZNO BERSTRUKTUR NANO DI ATAS SUBSTRAT KACA BERPELAPIS INDIUM TIN OXIDE Aliyah, Nada Alfi; Sugihartono, Iwan; Mohar, Rahmat Setiawan; Tiam, Tan Swee; Alaih, Akhmad Futukhillah Fataba; Triyono, Djoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol. 12 (2024): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2023
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1201.FA26

Abstract

Abstrak Pada penelitian ini telah dilakukan deposisi lapisan tipis ZnO berstruktur nano dengan menggunakan teknik Ultrasonic Spray Pyrolysis (USP) di atas substrat kaca Indium Tin Oxide (ITO) selama 15 menit pada suhu 450℃. Zinc Acetate Dyhydrate [Zn(CH3COO)2] digunakan sebagai prekursor Zn dengan variasi konsentrasi prekursor 0.1M dan 0.4M. Lapisan tipis ZnO telah dikarakterisasi menggunakan X-Ray Diffractometer (XRD), Uv-Vis Spectrofotometer, dan Scanning Electron Microscope (SEM) untuk menganalisis struktur kristal, absorbansi, dan struktur morfologi. Berdasarkan Inorganic Crystal Structure Database (ICSD) nomor #98-003-1060 dan #98-005-7478, pola X-Ray Diffraction (XRD) dari lapisan tipis ZnO memiliki struktur polikristal hexagonal wurtzite dengan space group P63mc. Uji Uv-Vis untuk sampel dengan konsentrasi 0.4M menunjukkan adanya peningkatan intensitas absorbansi paling dominan pada ~320 nm. Sehingga dapat diprediksikan sampel memiliki besar celah energi sebesar 3.2 eV. Kata-kata kunci: lapisan tipis ZnO, ultrasonic spray pyrolysis, struktur kristal, absorbansi, celah energi. Abstract In this study, we have deposited nanostructured ZnO thin films using the Ultrasonic Spray Pyrolysis (USP) method on an Indium Tin Oxide (ITO) glass substrate for 15 minutes at 450℃. Zinc Acetate Dyhydrate [Zn(CH3COO)2] was used as a Zn precursor with various precursor concentrations of 0.1M and 0.4M. The ZnO thin film has been characterized using an X-Ray Diffractometer (XRD), Uv-Vis Spectrophotometer, and Scanning Electron Microscope (SEM) to obtain a crystal structure, absorbance, and morphology structure. Based on the Inorganic Crystal Structure Database (ICSD) number #98-003-1060 and #98-005-7478, the X-Ray Diffraction (XRD) pattern of ZnO thin film has a polycrystalline hexagonal wurtzite structure with space group P63mc. Uv-Vis characterization for samples with a concentration of 0.4M showed that there was an increase in absorbance intensity that was most dominant at ~320 nm. Hence, it can be predicted that the sample has an energy gap of 3.2 eV. Keywords: ZnO thin film, ultrasonic spray pyrolysis, crystal structure, absorbance, bandgap.
Co-Authors Alaih, Akhmad Futukhillah Fataba Aliyah, Nada Alfi Cassia, Diva Isnaeni Isnaeni Iwan Sugihartono Mohar, Rahmat Setiawan Soewoto, Haswi Purwandanu Triyono, Djoko