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All Journal Jurnal Ilmu Dasar Journal of Mathematical and Fundamental Sciences Science and Technology Indonesia JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya JURNAL EKSAKTA PENDIDIKAN (JEP) Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Journal of Social And Economics Research
Ramli Ramli
Universitas Negeri Padang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Analysis of The Optical Properties of The Synthesis of Fe3o4/Pani Nanocomposites with The Sol-Gel Method using Spin Coating Nadya Aztifa; Yenni Darvina; - Ramli; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 1 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14332171074

Abstract

Research has been carried out on the analysis of the optical properties of Fe3O4/PANi nanocomposites synthesized by the sol-gel method using spin coating. The purpose of this study was to determine the crystal structure, crystal size, surface morphology, and optical properties of the Fe3O4/PANi nanocomposite thin films. One of the applications of optical properties is that it can be used as a semiconductor. In this study, the primary material used was iron sand obtained from Oyster Beach, Padang Pariaman Regency, West Sumatra. Iron sand contains a magnetite (Fe3O4) phase, which has the highest magnetic properties, and the polymer used is a type of polyaniline polymer (PANi) which has good chemical stability. Fe3O4 acts as a filler, while PANi acts as a matrix. In this study, five variations of the composition of Fe3O4 in PANi were used, namely 30%, 40%, 50%, 60%, and 70%. For the method used, namely the sol-gel method and sample testing using XRD, SEM, and UV-Vis Spectrophotometer characterization tools. The results of the XRD characterization showed that each addition of PANi into Fe3O4 did not affect the resulting crystal structure and had a crystal size below 100 nm. SEM testing revealed the presence of agglomeration and particle size at variations of 30%, 40%, 50%, 60%, and 70% were 27 µm, 53 µm, 61 µm, 84 µm, and 46 µm respectively. And the results of the UV-Vis Spectrophotometer test obtained energy gap values for variations in the composition of Fe3O4 in PANi, namely 30%, 40%, 50%, 60%, and 70%, respectively, namely 2.51 eV, 2.39 eV, 2.18 eV, 2.35 eV, and 2.30 eV. Based on the research results, it can be proven that the Fe3O4/PANi nanocomposite thin layer is a semiconductor material because it is in the range of 0-3 eV.
Development of Physics E-Jobsheet Integrated STEM Approach to Promote Students’ 21st Century Skills Hanana Laila Burhan; Asrizal Asrizal; Ramli Ramli
Jurnal Penelitian Pendidikan IPA Vol 11 No 2 (2025): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i2.5056

Abstract

The development of science and technology that is developing very quickly is challenge for the world of education to prepare students who are able to compete in the current era of revolution. This research aims to produce product in the form of a class XI high school physics e-jobsheet integrated with a STEM approach to improve the skills of 21st century students. The type of research used R&D research with the development model used in this study The development model used is the ADDIE development model. Data collection techniques used are observation, interview, and questionnaire methods. Based on the data that has been analyzed, three conclusions can be drawn. First, at the analysis stage, four analysts were carried out, the results of the analysis of graduate competency standards analysis of learning activities, analysis of participant characteristics, and analysis of 21st century skills. Second, the validation result is 0.76 with valid category. Third, the results of practicality by educators are 81 with very practical category, for the results of practicality by education participants are 83.53 with categories Very practical. The results of the study concluded that the integrated physics e-jobsheet STEM approach is valid and practical for use in learning
Design of Biogas Reactor as a Sustainable Energy Source in Pauh Sub-District Padang, West Sumatra Ramli Ramli; Letmi Dwiridal
Pelita Eksakta Vol 1 No 2 (2018): Pelita Eksakta Vol. 1 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol1-iss02/26

Abstract

Cow dung waste in Pauh sub-district is widely available. Only partly used as a traditional fertilizer. In fact, the utilization of cow dung is one of the alternative sources of renewable energy. Although biogas technology is not something new in Indonesia, the obstacles faced by farmers are their lack of knowledge about processing cow dung into biogas and making of biogas reactors. Community service has been undertaken to provide knowledge through guidance and counseling methods to farmers about biogas, biogas reactor manufacturing and technology, and the advantages of biogas reactors, both in terms of economic and environmental values. Stages of the implementation of the activities; 1). Provide guidance and counseling to farmers about biogas and how to manufacture biogas reactor, 2). Provide guidance and counseling about the safety of biogas reactors, 3). Conduct periodic monitoring of farmer groups that are partners to the continuity and continuity of activities. The result of the activity is the availability of biogas reactor in farmer group in Pauh sub-district. The fermentation process to produce biogas in the reactor is approximately 3 weeks. Biogas reactors are built easy to make and cheap.
Co-Authors - Helmita - Rahmi - Yulkifli Adli Dzil Ikhram Ahmad Aminudin Ahmad Fauzi Ahmad Rofiq Ambran Hartono Ambran Hartono Ambran Hartono arifaldi arifaldi Asrizal Bevi Lidia Cici Dwi Tisa Haspen Cuk Imawan Dadang Dadang Desnita Dessi Verawati Djusmaini Djamas Djusmaini Djamas Djusmaini Djamas Edi Sanjaya Edi Sanjaya Elvida Yulia Fadhila Ulfa Jhora Faridah Lisa Supian Fatni Mufit Fildzah Rudyah Putri Nurzam Fitri Anika Freddy Haryanto Gusmita Cahnia Putri Gusnedi Gusnedi Hamdi Rifai Hanana Laila Burhan Haryona Delvita Herman Bahar Hidayati Hidayati Hifnul Rizky Al Ulfa Iing Rika Yanti Imron Maulana Indah Septia Ningsih Irna Humairah Jalu Ahmad Prakosa Khairunnisa Khairunnisa Khairurrijal Khairurrijal Lathifa Zonesya Putri Letmi Dwiridal Lucya Sinurat Mahrizal Mahrizal masril masril Mitra Djamal Mitra Djamal Mitri Selisne Moulia Fadhilah Muhammad Yogi Rivano Nadia Ardianti Nadya Aztifa Nidya Yulfriska Nurhafizah Nurhafizah Nurul Hasanah Daniyah Putri Onny Gustira Puja Kahar Putri Auliyani Putri Diana Rahadian Zainul Rahmat Hidayat Ramanda Fazrian Ratnawulan . Renol Afrizon Ricca Tiara Rif'il Husniyah Rigis Sugianti Rika Nanda Rio Anshari Riri Jonuarti rizka fauziah Romizah Marta Rumi Yuliska Silvi Trisna Silvi Yulia Sari Silvira Wahyuni Siti Fauziah Sovia Yulianti Suci Wahyuni Sumi Sahara Suparno Satira Surya Pertiwi Syafri Jamain Syafriani Syafriani Syafrijon Syafrijon Tia Adriany Putri Usmeldi Usmeldi Vanessa Febta Sindani Varadila Sahanaya viola sesri wahyuli Viona Zikra Yerman Wahyumin Kurnia Illahi Wahyuni Satria Dewi Yenni Darvina Yessy Arinda Putri Yohandri Yona Sri Mantia Yonira Mike Vindi Marta Yufrizal Yufrizal Yulis Septianas Sari Yulkifli Yulkifli Yulkifli Yulkifli Zaitul Hidayat Zhafrandy Eka Senida Zulhendri Kamus