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All Journal Rekayasa Mesin Journal of Engineering and Management in Industrial System Journal of Environmental Engineering and Sustainable Technology Jurnal Teknik Pengairan: Journal of Water Resources Engineering ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology ALCHEMY Jurnal Penelitian Kimia PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Mekanika: Majalah Ilmiah Mekanika Jurnal ABDINUS : Jurnal Pengabdian Nusantara TECHNO-SOCIO EKONOMIKA Nusantara Science and Technology Proceedings International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Journal of Multidisciplinary Applied Natural Science
Denny Widhiyanuriyawan
Brawijaya University
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Performance Enhancement of Dye Sensitized Solar Cell (DSSC) through TiO2/rGO Hybrid: Comprehensive Study on Synthesis and Characterization Hatib, Rustan; Anwar, Khairil; Magga, Ramang; Astak, Muh Anjas; Widhiyanuriyawan, Denny; Wardoyo, Wardoyo
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 1 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i12024p138

Abstract

The TiO2 film is immersed in a graphite oxide solution, preparing it for thermal reduction, which converts the graphite oxide to reduced graphene oxide (rGO). This process produces rGO hybrid TiO2 photoanodes for dye-sensitized solar cells (DSSC). rGO in the TiO2 structure prevents electron recombination and improves overall efficiency. The main advantage of this method is its ability to prevent loss of rGO during the sintering process, which is a common problem with other methods. The study investigated heating temperatures ranging between 300˚C, 350˚C, 400˚C, 450˚C, and 500˚C to determine optimal conditions. The presence of rGO in the photoanode structure was confirmed via X-ray diffraction and Fourier transform infrared spectroscopy analysis. JV (current-voltage density) measurements of DSSC based on TiO2/rGO photoanode revealed that the highest photoelectric conversion efficiency (0.1923%) was achieved at 400˚C, much higher than other temperature variations. The findings demonstrate the effectiveness of a simple low-temperature thermal reduction process in producing graphene suitable for semiconductor applications in DSSC. The RGO produced through this method not only improves energy conversion efficiency but also outperforms traditional graphite electrodes. By optimizing the thermal reduction process and fine-tuning the heating conditions, this study advances the practical application of graphene-based materials in solar cell technology. This method overcomes the loss of rGO during sintering, ensuring its beneficial properties are retained. Overall, this study shows that low-temperature thermal reduction is an efficient technique to improve DSSC performance through the incorporation of reduced graphene oxide.
Peningkatan Budaya Wirausaha Pemuda Berbasis Produk Kopi Wilis sebagai Pendukung Pariwisata di Danau Ngebel, Kabupaten Ponorogo, Jawa Timur Saputra, Anggara Wiyono Wit; Sugiarto, Sugiarto; Widhiyanuriyawan, Denny; Setyono, Langgeng
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 8 No 2 (2024): Volume 8 Nomor 2 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v8i2.21528

Abstract

The Ngebel area in Ponorogo Regency, East Java, is one of the hidden tourist destinations that has yet to be fully exposed but is becoming a favorite tourist destination in Indonesia. The natural beauty of Lake Ngebel, in the form of a natural lake, is an attraction in itself that can be explored and developed as a natural tourist area in Indonesia. Apart from the natural lake, which holds potential, the Ngebel area is also known for its potential as a robusta coffee center, famously known as Wilis coffee. This initiative aims to provide mentoring and technology application to the youth in Ngebel village and its surrounding areas to become a driving force for the emergence of young entrepreneurs in building businesses based on local commodities, especially Wilis coffee products, thus making it a flagship product and supporting the development of Lake Ngebel tourism. The community service activities consist of entrepreneurial training, the application of appropriate technology such as coffee roasting machine production, and mentoring millennial café entrepreneurs in the Lake Ngebel area as a tourist destination. The results of these activities show that the application of appropriate technology in roasting coffee with various flavors increases the entrepreneurial spirit of the youth in the Lake Ngebel area and can be utilized to better market Wilis coffee products, thereby supporting tourism activities in the Lake Ngebel area.
Sintesis Hidroksiapatit secara Elektrolisis sebagai Bahan Baku Pembuatan Scaffold Tissue HA/PVA-AgCl untuk Aplikasi Penyembuhan Luka Supriyono Supriyono; Bambang Poerwadi; Denny Widhiyanuriyawan; Nasirotul Wildah; Mahfita Ardyarum; Nabila Widadudari; Ilhan Junio Trizardi; Ulya Ahda Yustisia
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 2 (2024): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.2.80273.206-217

Abstract

Hidroksiapatit (HA) sebagai bahan dasar dalam scaffold tissue memiliki kemampuan untuk berikatan langsung dengan jaringan tubuh secara in vivo. Scaffold tissue pada penelitian ini dalam bentuk membran komposit terdiri dari nHA/PVA-AgCl. AgCl berfungsi sebagai agen antibakteri, sedangkan PVA berfungsi sebagai polimer perekat. Ukuran nanometer untuk HA diperoleh melalui proses elektrolisis yang mengatur voltase untuk mengendalikan ukuran partikel. Variasi potensial listrik elektrolisis 4, 5, dan 6 V digunakan dalam proses selama enam jam. Sebagai pembanding, HA komersil juga digunakan dalam penelitian ini dan hasilnya menunjukkan bahwa voltase 5 V menghasilkan HA yang murni tanpa adanya brushite. Dalam hal diameter partikel, HA yang disintesis dengan potensial listrik 4, 5, dan 6 V, serta HA komersil masing-masing memiliki diameter 232 nm, 276 nm, 355 nm, dan 5421 nm. Metode BET untuk pengujian luas permukaan menghasilkan nilai berturut-turut untuk variabel potensial listrik elektrolisis HA 4, 5, dan 6 V, serta HA komersil masing-masing adalah 317,22; 344,247; 323,419; dan 205,779 m2/g. Hasil uji pre-klinis selama tujuh hari menunjukkan bahwa scaffold tissue yang menggunakan HA sintesis dengan voltase 5 V menghasilkan pertumbuhan fibroblas yang paling baik, dengan nilai rata-rata sekitar 47,3±4,53 fibroblas/nm2.Synthesis of Hydroxyapatite by Electrolysis as Raw Material for Making HA/PVA-AgCl Tissue Scaffold for Wound Healing Application. . Hydroxyapatite (HA), the primary material in scaffold tissue, can directly interact with the body's tissues in vivo. In this research, the scaffold tissue forms a composite membrane consisting of nHA/PVA-AgCl, with AgCl as an antibacterial agent and PVA as a binding polymer.Nanometer-sized HA particles are obtained through electro-synthesis, controlling voltage to regulate particle size. Three voltage variations, 4, 5, and 6 Vare used in the process for 6 hours. Commercial HA is also used for comparison, and the results indicate that 5 V voltage produces pure HA without brushite contamination. In terms of particle diameter, HA synthesized at 4, 5, 6 V, and commercial HA each have diameters of 232, 276, 355, and 5421 nm, respectively. The BET method is employed to test surface area, yielding consecutive values for the electro-synthesized HA voltage variations, with 4, 5, 6 V, and commercial HA having surface areas of 317.22; 344.247; 323.419; and 205.779 m2/g, respectively. The pre-clinical test in 7-days period findings reveal that scaffold tissue using HA synthesized at 5V voltage produces the best fibroblast growth, with an average value of approximately 47.3±4.53 fibroblasts/nm2.
SPATIAL AND TEMPORAL POTENTIAL OF CURRENT ENERGY AND WAVE HEIGHT IN INDONESIAN SEA Alamsah, Azwar; Wahjudi, Ari; Moon, Park Jae; Hamidi, Nurkholis; Widhiyanuriyawan, Denny
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 2 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.02.8

Abstract

The energy demand in Indonesia continues to rise, with a primary reliance on fossil fuels, leading to environmental issues such as increased CO2 emissions. To address these challenges, the exploration of renewable energy, particularly from wave and ocean current sources, becomes crucial. This research analyzes the energy potential generated from waves and ocean currents throughout Indonesia using the WAVEWATCH-III method for modeling marine data over a 10-year period. The results indicate that the energy potential from ocean currents ranges between 120-150 kW, with strategic locations around straits such as the Makassar Strait and the Java Sea. Meanwhile, the potential energy from ocean waves reaches approximately 2.5 GW over a three-month period, thanks to Indonesia's extensive coastline of 99,093 km. Spatial and temporal analyses reveal significant variations in Sea Level Anomaly (SLA) values, which can be utilized for the development of renewable energy projects. The conclusion of this research emphasizes the need for a deeper understanding of the dynamics of ocean currents and waves to maximize the utilization of renewable energy potential in Indonesia.
Potensi Energi Arus dan Tinggi Gelombang Laut Indonesia Berdasarkan Data Penginderaan Jauh Alamsah, Azwar; Wahjudi, Ari; Moon, Park Jae; Hamidi, Nurkholis; Widhiyanuriyawan, Denny
TECHNO-SOCIO EKONOMIKA Vol 18 No 1 (2025): Jurnal Techno-Socio Ekonomika - April
Publisher : LPPM Universitas Sangga Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32897/techno.2025.18.1.4087

Abstract

Indonesia's energy demand continues to increase, with a primary reliance on fossil fuels that contribute to environmental issues, such as rising CO₂ emissions. To address this challenge, this study explores the potential of renewable energy from wave and ocean current sources. The research process analyzes the energy potential generated from waves and ocean currents across Indonesian waters using the WAVEWATCH-III method to model ocean data over a 10-year period, focusing on energy potential at strategic locations in Indonesian waters. The results show that the energy potential from ocean currents ranges between 120–150 kW, with strategic locations around straits, such as the Makassar Strait and the Java Sea. Meanwhile, the wave energy potential reaches approximately 2.5 GW over a three-month period, thanks to Indonesia’s extensive coastline of 99,093 km. Spatial and temporal analyses reveal significant variations in Sea Level Anomaly (SLA) values, which can be utilized for the development of renewable energy projects. The conclusion of this study emphasizes the need for a deeper understanding of ocean current and wave dynamics to maximize the utilization of renewable energy potential in Indonesia. Spatial and temporal analyses show significant variations in SLA values across Indonesia, reflecting the dynamics of ocean currents. Understanding these changes is crucial for planning adaptive ocean current energy projects, and seasonal trend analysis can help optimize the use of ocean current patterns.
Optimization of a Mixture of Curcuma Dye Mixture with SiO₂ (Rice Husk Waste) to the Energy Efficiency of TiO₂ -based Solar Cells Subagyo, Tulus; Widhiyanuriyawan, Denny; Widodo, Agung Sugeng; Wardana, I Nyoman Gede
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.288

Abstract

Global energy challenges and environmental problems encourage the search for sustainable energy solutions, with TiO₂-based solar cells that are still limited to its efficiency due to low light absorption and charge recombination. This study aims to examine the synergistic effect of curcuma and SiO₂ dye from rice husk waste in improving the energy efficiency of TiO₂ solar cells. The research methodology involves the fabrication of sensitive solar cells with different layer compositions: TiO₂ only, TiO₂ with one layer of SiO₂ (1L-SiO₂), two layers (2L-SiO₂), and three layers (3L-SiO₂). The TiO₂ photoanode is prepared using the screen printing method, followed by loading coloring through immersion in the curcuma coloring solution. The performance of solar cells is evaluated using the current voltage measurement (I-V) and electrochemical impedance spectroscopy (EIS) to analyze efficiency, charge transportation, and recombination processes. The results show that the addition of SiO₂ increases the efficiency of solar cells, with 1L-SiO₂ producing the highest compilation of short circuit (JSC) 0.37 mA/cm², showing an increase in cargo transportation. However, 1L-SiO₂ shows a decrease in performance due to excessive thickness, which leads to an increase in charge recombination and internal resistance. Impedance analysis confirms that 1L-SiO₂ optimizes cargo transportation but also increases recombination resistance, which affects overall efficiency. Adding SiO₂ from rice husk waste increases the efficiency of TiO₂-based solar cells, with curcuma coloring increases light absorption and charge transfer. However, excessive SiO₂ layers reduce performance due to higher recombination and resistance. Further research is needed to optimize the thickness of the layer and dye stability.
Penerapan Teknologi Tepat Guna dalam Peningkatan Produksi Kopi Wilis di BUMDesa Barokah Desa Ngebel, Kabupaten Ponorogo, Jawa Timur: The Application of Appropriate Technology in Improving the Coffee Production of Wilis Coffee at BUMDesa Barokah, Ngebel Village, Ponorogo Regency, East Java Saputra, Anggara Wiyono Wit; Sugiarto, Sugiarto; Widhiyanuriyawan, Denny; Setyono, Langgeng; Nugroho, Arief Budi
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 8 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i8.9580

Abstract

This community service activity is carried out to improve the quality of life for the people of Ngebel Village, Ponorogo Regency, by applying appropriate technology in coffee production. Ngebel Village is known as a producer of Wilis coffee, which has great potential but still faces issues in post-harvest processing that are not yet efficient. This activity aims to improve the productivity and quality of Wilis coffee by implementing modern coffee hulling and grinding machines. The methods used in this activity include a functional approach and mentoring, with the application of appropriate technology in the form of coffee hulling and grinding machines specifically designed to enhance production efficiency. Training is conducted to ensure that the BUMDesa managers can operate and maintain the machines properly. After implementing these machines, there is expected to be a significant increase in the efficiency of coffee processing, a reduction in production costs, and an improvement in the quality of Wilis coffee. The community will also acquire new skills in operating post-harvest coffee technology. Additionally, this activity helps improve the competitiveness of Wilis' coffee products in the market. By applying appropriate technology in coffee production at BUMDesa Barokah in Ngebel Village, the main goal of sustainable activity will be achieved: improving the quality and efficiency of coffee production, which contributes to the economic well-being of the local community.
Co-Authors Achmad Misbah Adi Yermia Tobe Agung Sugeng Widodo Agung Sugeng Widodo Ahmad Khairul Faizin Aji, Supa Kusuma Alamsah, Azwar Amajida Sadrina Anggara Wiyono Wit Saputra, Anggara Wiyono Wit ARDIANSYAH ARDIANSYAH Ari Wahjudi Asroful Anam Astak, Muh Anjas Bambang Poerwadi Candra Trimandoko, Candra de Fretes, Henry Valentino Desyandri Desyandri Dida, Hero P Djoko Sutikno Dody Candra Kumara, Dody Candra Eko Siswanto Faruq Syah Permana Putra Gilang Rausan Fikri Noor I Nyoman Gede Wardana Ikhwanul Qiram Ilhan Junio Trizardi ING Wardana ING. Wardana, ING. Khairil Anwar Langgeng Setyono, Langgeng Lilis Yuliati M. Ruslin Anwar Mahfita Ardyarum Mangku Purnomo Mariki, I Wayan Wawan Mega Nur Sasongko Mietra Anggara Moh. Syamsul Ma’arif Moon, Park Jae Muhammad Rijalul Fadli Nabila Widadudari Nasirotul Wildah Ndaru Adyono Nugroho Adi Purnomo Nugroho, Arief Budi Nur Aini Uwar Nurkholis Hamidi Nurkholis Hamidy Pitojo Juwono Pratikto, Pratikto Purnami Purnami Radissa Dzaky Issafira Rahadi Agung Raharjo Ramadan Bimo Anggoro Ramang Magga Redi Bintarto Roymons Jimmy Dimu Rudianto Rudianto Rudy Soenoko Runi Asmaranto Rustan Hatib Ryan Rizaldi Slamet Wahyudi Sonief, A. As’ad Sudjito Soeparman Sugiarto Sugiarto S Sugiono Sugiono Supriyono Supriyono Syamsul Bahri La Muhaya, Syamsul Bahri Syamsul Hadi Teguh Dwi Widodo Tjuk Oerbandono Tria Puspa Sari Tulus Subagyo, Tulus Ulya Ahda Yustisia Wahyu Dwi Lestari Wardoyo Wardoyo Wicaksono, Hangga Widya Wijayanti Wijono Wijono Wiliandi Saputro Zainal Arifin Zulkifli Kurniawan