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All Journal International Journal of Renewable Energy Development BERKALA FISIKA Journal of Physics: Theories and Applications INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Fisika : Fisika Sains dan Aplikasinya Journal La Lifesci Jurnal Serambi Abdimas Molekul: Jurnal Ilmiah Kimia Jurnal Stasiun Geofisika Sleman (JSGS)
Mukhtar Effendi
Universitas Jenderal Soedirman
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics

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Reduced Graphene Oxide/Silica Based Electrode Material: Synthesis and Characterization Rafiq, Sinta Nur Mazida; Rahmawati, Dina; Effendi, Mukhtar; Ghoshal, Sib Krishna; Kurniawan, Candra; Widanarto, Wahyu
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 14, No 2 (2024): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v14i2.83371

Abstract

Developing a Reduced Graphene Oxide (rGO) synthesis method based on rice husk as a composite electrode material with silica has garnered particular attention for designing high-quality electrode materials. This research successfully synthesized rGO-Si material from rice husk-derived activated carbon through a one-step thermal reduction process at 200 °C. This method offers a simple, efficient, cost-effective, and environmentally friendly synthesis approach. The resulting samples' morphology, surface composition, crystal structure, surface area, and pore diameter size were characterized using FE-SEM, EDX, XRD, and SAA-BET. EDX characterization results confirmed the predominance of carbon content in the samples. At the same time, the natural emergence of Si without external addition due to thermal reduction at 200 °C was an intriguing initial finding. The spherical crystal structure of silica between the wrinkled rGO layers was confirmed through FE-SEM and XRD analysis. The synergistic effect between Si and rGO significantly increased the sample's surface area, with a value of 34.17 m2/g for the rGO sample before thermal reduction, which increased to 121.24 m2/g after the thermal reduction process at 200 °C. This process also positively impacted the reduction in pore size of rGO-Si, with a value decreasing from 9.33 nm before thermal reduction to 4.89 nm after the thermal reduction process. The results of this study demonstrate that rGO-Si synthesized from rice husk-derived activated carbon holds great potential as a high-performance electrode material, combining the advantages of thermal reduction, natural Si content, and increased surface area for diverse applications.
Effect of Annealing Temperature On Iron Doped Titanium Dioxide Thin Films Prepared By Spin Coating Technique Effendi, Mukhtar; B, Bilalodin
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1294

Abstract

Iron (Fe) doped titanium dioxide (TiO2) thin films have been successfully deposited by using spin coating technique. X-ray diffraction (XRD) and Scanning Electron Microscope (SEM) were employed to characterize the microstructure and crystallite morphology of the films. It was indicated that the rutile crystal orientation appears due to increasing annealing temperature of the thin films. Furthermore, increasing annealing temperature of the thin films yielded an increasing of porosity value which is related to the application on gas sensor films.
Co-Authors - Sehah, - Abdullah Nur Aziz Aminuddin, Jamrud Aminuddin, Jamrud Arifin, A Aris Haryadi, Aris Aris Setiawan Aziz, Abdullah N B, Bilalodin Bilalodin Bilalodin Candra Kurniawan Dina Rahmawati Eiji Kominama Erfan Handoko Farzand Abdullatif Fuzi Nurrahman Fauzi, Fuzi Nurrahman Ghoshal, Sib Krishna Gumelar, Syahrul Fadholi Hartono Hartono Hiroyuki Yokoi Jatmika, Jumaeda Lazuardi Umar Moh. Husein Sastranegara Mudrik Alaydrus Mujiono Mujiono Nabila, Hafsyah Putri Nobutsuga Minami Nurhayati Nurhayati Pakhrur Razi Rafiq, Sinta Nur Mazida Raharjo, Sukmaji A Retno Supriyanti Saefurohmah, Mufti Shojiro Takeyama Sunardi Sunardi Susanti, Dwi Budi Tamtowi, Tomy W, Wihantoro Wahyu Tri Cahyanto Wahyu Widanarto, Wahyu Widiyani, Agustina Wihantoro Wihantoro