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All Journal Transformasi: Jurnal Pengabdian Masyarakat Jurnal Penelitian Pendidikan IPA (JPPIPA) Momentum: Physics Education Journal JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Profesi Pendidikan Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Phydagogic : Jurnal Fisika dan Pembelajarannya Journal of Civil Engineering and Vocational Education Journal of Experimental and Applied Physics
Fadhila Ulfa Jhora
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Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Transportation Other

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Journal : Journal of Experimental and Applied Physics

 1 
Analysis of Optical Properties of Graphene Oxide from Bamboo Petung (Dendrocalamus Asper) Synthesized by Modified Hummer Method Indah Safira; Ramli; Yenni Darvina; Fadhila Ulfa Jhora
Journal of Experimental and Applied Physics Vol 1 No 2 (2023): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i2.20

Abstract

Carbon, hydrogen and oxygen are abundant in the structure of graphene oxide (GO), often known as graphene. In this study, petung bamboo was used in the manufacture of graphene oxide. The aim of this research is to find out how the sintering temperature influences the ability of graphene oxide to absorb waves. The modified hummer method is used to oxidize graphite and produce Graphene Oxide. This research was divided into several parts, namely burning carbonized petung bamboo, production of graphene oxide, and sonication and neutralization of graphene oxide using sintering temperatures of 300°C, 350°C, 400°C and 450°C. The synthesis results were characterized using a UV-Vis spectrometer to obtain an absorption spectrum resulting in a band gap of 2.68 eV-4.38 eV in Petung bamboo at a sintering temperature of 300oC - 400oC, the bandgap increasing as the sintering temperature increased. At a sintering temperature of 400oC - 450oC the band gap value decreases which is influenced by the results of cell changes from refinement which can change the band structure thereby affecting the size of the band gap. The absorption value obtained in the optical properties decreases because the high sintering temperature causes the reaction rate to become faster so that the absorption value becomes lower.
Determination of Thermal Conductivity and Porosity of Composite Panels from Fibers, Bagasse Powder and Polypropylene (PP) Plastic Waste Azca Aryadiva Mahengga; Yenni Darvina; Ramli Ramli; Fadhila Ulfha Jhora
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.36

Abstract

Global warming causes temperatures on the earth's surface to increase. High temperatures during the day will make the temperature in the room of the residential house increase. The impact will affect the warmth of residents. One of the causes of the increase in indoor temperature is due to the absorption of solar heat by the components of the walls and roof. One alternative that can be done is the manufacture of composite panels that act as heat insulators using bagasse fibers, bagasse powder and the matrix of polypropylene plastic waste with low thermal conductivity, and high porosity. The composition of the composite varies the percentage of fibers and powders with a fixed percentage of polypropylene plastic waste of 90%. The percentage variation of polypropylene plastic waste of bagasse fiber and powder used is 100%:0%:0%, 90%:10%:0%, 90%:8%:2%, 90%:6%:4%, 90%:4%:6%, 90%:2%:8%, and 90%:0%:10%. Based on the test results, successive thermal conductivity values were 0.226715 W/moC, 0.16241 W/moC, 0.13543 W/moC, 0.09582 W/moC, 0.11457 W/moC, 0.15351 W/moC, 0.18276 W/moC. The porosity values of successive samples were 0.63116%, 2.84024%, 3.36151%, 3.85179%, 3.24880%, 3.09383%, 2.65145%. From the test results, it was obtained that variation 4 had the highest thermal conductivity value with a value of 0.09582 W / moC. while the highest porosity value was obtained in variation 4 with a value of 3.85179%. Composite panels with a variation of 4, and a variation of 5 are optimum variations that can be used as a good heat insulation material.
Analysis of the Influence Mass Variations of Banana STEM Fibres with Polypropylene (PP) Matrix on Accoustic and Porosity Properties Viera Alvio Santika; Yenni Darvina; Ratnawulan Ratnawulan; Fadhila Ulfa Jhora
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.54

Abstract

Noise pollution is sound that you do not want to hear or is known as noise. If people hears loud noises continuously, it can disrupt hearing function. Therefore, it is necessary to have noise control by making an acoustic material that will be coated on the room's walls. A cheap and environmentally friendly alternative material is using banana stem waste from the fibre taken and with polypropylene as a fibre binder. This research aims to determine the effect of variations in the mass composition of banana stem fibre with the matrix polypropylene on the value of the acoustic properties and porosity, and determine the relationship between porosity with acoustic properties. Characteristics of the acoustics that will be measured are sound absorption coefficient, sound reflection coefficient, and transmission loss. The method used is using a characterizaton tool with one microphone impedance tube and porosity test tool with a digital scale. Acoustic material is made by varying the mass percentage in the ratio of polypropylene and midrib fibre banana, namely 90%:10%; 85%:15%; 80%:20%; 75%:25%; and 70%:30%. Based on the research results, it is known that the more fibre composition in the composite, the sound absorption coefficient values, transmission loss values, and porosity values were higher produced, but the resulting sound reflection coefficient value was lower. Then, the relationship between porosity with acoustic properties was that the higher porosity value, the resulting sound absorption coefficient and transmission loss value are higher too. However, the resulting sound reflection coefficient value was getting lower.
Effect of The Camposition Nanocomposite Fe3O4-Graphene Oxide on Optical Properties Synthesized from Coconut Shell Charcoal Sri Angraini; Gusnedi Gusnedi; Riri Jonuarti; Fadhila Ulfa Jhora
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.60

Abstract

This study aims to determine the effect of Fe3O4 nanocomposite composition: Graphene Oxide on the optical properties of Fe3O4 Graphene Oxide nanocomposite by obtaining the results of absorbance value, transmittance, reflectance, and band gap value based on UV-Vis test. Graphene oxide used in this study is made from biomass waste coconut shell charcoal which contains carbon elements, most of whose pores are still covered by hydrocarbons and other organic compounds and the charcoal is used as activated carbon through an activation process, then synthesized using the modified hummers method. In this study, three variations were used, namely 20%: 80%; 30%; 70%; 40%: The results show that the effect of Fe3O4-Graphene Oxide Nanocomposite Composition on coconut shell waste using a UV-Vis spectrometer, the absorbance value of each sample was obtained in the range of 200-290 nm.. In the results of gap energy research with 3 variations respectively 3.269 eV, 3.79 eV, 3.91 eV obtained that if the variation of graphene oxide is higher than the value of the energy gap produced is smaller, so the addition of graphene oxide from coconut shell waste has the effect of reducing the energy gap of graphene oxide.
Effect of SiO2/Chitosan Composition Variation on Functional Groups in Hydrophobic Cellulose Paper for Water/Oil Separation Fauziyah Almunazar; Ratnawulan Ratnawulan; Yenni Darvina; Fadhila Jhora
Journal of Experimental and Applied Physics Vol 3 No 1 (2025): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v3i1.90

Abstract

The current research is conducted to study the effect of varying compositions of SiO2-Chitosan on the changes occurring in the functional groups available in cellulose paper that shows hydrophobic nature, which can be used for water and oil separation purposes. The composite layer studied is the silica-chitosan solution coated over the cellulose paper using the dip-coating method. Varying compositions of SiO2-chitosan studied are (0.6g:0.3g), and (0.3g:0.6g). Characterization by FTIR revealed the presence of the main functional groups, i.e., Si-O-Si, C-H, C-O, N-O, N-H, C-N, and O-H, with a range of 938-3784 cm⁻¹ strain. The identification of these functional groups attests to the incorporation of the SiO2-chitosan compound on the surface of the cellulose paper. This functionalization imparted a hydrophobic layer, as demonstrated by the capacity of each composition to cause the characteristic spectrum of the SiO2-chitosan compound. The results of this study confirm that the modification of SiO2-Kitosan composition has significant influences on the chemical properties and physical stability of the composite coating. This result explains the great potential of cellulose-based materials in water and oil separation technology. In addition, these results enable the development of sustainable materials with great efficiency in fluid separation applications.
Co-Authors - Ramli Akmam Akmam Aprianti, Rika Asrizal Azca Aryadiva Mahengga Bana, Vrielsha Cahyaningrum, Wahyu Defrizal Saputra Fanny Rahmatina Rahim Fauziyah Almunazar Fourier Dzar Eljabbar Latief Freddy Haryanto Gina Fadilah NST Gusnedi Gusnedi Gusnedi Gusnedi Gusnedi, - Harman Amir Hidayati Hidayati Ilahi, Fitratul Indah Safira Indri Saputri Pertama Irfan Ananda Ismail Kiki Yuliza Noerman Leni Aziyus Fitri Letmi Dwiridal Letmi Dwiridal Monica Anatasya Doni Munadia Insani Nabilah Farras Drasih Nadia Ardianti Nadiyyah, Khoirotun Nofi Yendri Sudiar Putri Dwi Sundari Putri, Ulfa Haldiani Qadriati Qadriati Rahmat Hidayat Rahmat Hidayat Rahmat Hidayat Ramli Ramli Ramli Ramli Ramli Ratna Wulan Ratnawulan . Riri Jonuarti Riri Jonuarti Riri Jonuarti Riri Jonuarti Silvi Yulia Sari Sonya Afrilla Sri Angraini Viera Alvio Santika Wahyuni Satria Dewi Widiasih, Widiasih Yenni Darvina Yenni Darvina Yuli Hardina Yuliana, Yuli Zahwa Septia Zakirman