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All Journal SEMAR International Journal of Renewable Energy Development
Agung Tri Wijayanta
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Sebelas Maret, Surakarta
Humanities Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences

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Outdoor Fitness Untuk Kalangan Penyandang Cacat/Disabilitas Di Kawasan Wisata Gunung Pegat, Desa Karangasem, Kabupaten Sukoharjo Budi Kristiawan; Syamsul Hadi; Dwi Aries Himawanto; Indri Yaningsih; Eko Prasetya Budiana; Agung Tri Wijayanta
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 12, No 1 (2023): Mei
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v12i1.69781

Abstract

Pariwisata adalah salah satu faktor pendorong ekonomi di sebuah daerah. Perkembangan sektor pariwisata suatu daerah dapat memacu pembangunan sarana infrastruktur yang lain, seperti hotel, minimarket, jalan raya dan lain-lain. Dengan mengembangkan sektor pariwisata, maka akan terciptanya lapangan pekerjaan yang baru dan mengurangi pengangguran. Salah satu pariwisata yang sedang menjadi minat masyarakat adalah wisata jasmani. Selain menjadi sarana menghilangkan stres, wisata jasmani juga bisa menjadi sarana masyarakat untuk tetap menjaga kesehatan dan kebugaran tubuh. Salah satu wisata jasmani yang belakangan ini menjadi minat masyarakat adalah sarana alat fitness outdoor. Setiap sarana fasilitas umum termasuk sarana pariwisata haruslah ramah terhadap pengguna disabilitas. Pengabdian kepada masyarakat di kawasan wisata Gunung Pegat Desa Karangasem bertujuan meningkatkan dan menggairahkan roda perekonomian melalui obyek wisata dengan menempatkan sarana alat fitnes outdoor yang ramah dengan pengguna disabilitas.Kata Kunci: Outdoor fitness; disabilitas; pariwisata
Screen printed carbon electrode from coconut shell char for lead ions detection Kinkind Raras Heliani; Fitria Rahmawati; Agung Tri Wijayanta
International Journal of Renewable Energy Development Vol 13, No 1 (2024): January 2024
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2024.57679

Abstract

This research aimed to produce a screen-printed carbon electrode (SPCE) from an activated coconut shell carbon. As a raw material, coconut shell char provides renewability and is abundantly available in the market. Meanwhile, SPCE offers a simple electroanalytical electrode because the working, counter, and reference electrodes are in one piece. The coconut shell carbon was activated by steam at 700 oC for 1h, producing AC700 that was then characterized to ensure the result by following per under carbon as the main component, the phases, crystal structure, surface area, morphology, and elemental content. The result showed that the surface area of AC700 is 816 m2/g, and the surface structure is porous, as identified by SEM images. Impedance analysis followed by data fitting and conductivity calculation found a high conductivity of 8.68 x 10-2 Scm‑1. The produced-SPCE or SPAC700 was modified by ferrocene at various compositions of 10%; 20%; and 30% of mass. The SPAC700-Fc30 provided the best performance for lead analysis with a detection limit of 0.35 mM, a quantitation limit of 1.17 mM, and good reproducibility with a Repeatability Coefficient (RC) of 0.022. SPAC700-Fc30 showed good lead ions detection despite under 10% Cu2+ and 10% Co2+ interferences. The result confirmed the potential use of coconut shell char as the raw material for SPCE production.
Molecular simulation of single N and double N/S doping to carbon networks and the effect of doping dispersant Arikasuci Fitonna Ridassepri; Fitria Rahmawati; Agung Tri Wijayanta; Dedi Rohendi; Dyah Purwaningsih; Shota Sato; Jun Nakamura
International Journal of Renewable Energy Development Vol 15, No 5 (2026): September 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61404

Abstract

This research conducted a molecular simulation of single N and double N/S doping into a carbon network. The simulation aimed to explain the effect of N and N/S doping, which was investigated experimentally by our previous research, and to prove the hypothesis that N and/or S replace a normal C site within the carbon crystal structure. Experimental data agree with the simulation result, as shown by the increasing ID/IG ratio in the Raman spectrum, which indicates defect formation after doping. Meanwhile, the XRD patterns of the doped carbon are similar to those of the undoped carbon. It suggests that the dopants N and/or S diffused and replaced the C atom from its normal site in the carbon crystal structure without forming new N and/or S-based compounds. The result is consistent with different dispersants investigated in this research, i.e., deionized water and ethanol. However, ethanol provided better dispersibility than water, resulting in a modified N/S carbon material with ethanol dispersant, NSCE, with a higher electrical conductivity of 23.74 x 10-1 Scm-1 than the N/S-modified carbon with water dispersion, NSCW, i.e., 5.97 x 10-1 Scm-1. The presence of defects increases the number of sites for charge carriers to migrate within the carbon network, making it a good electrode material for an LFP battery, with an initial charging capacity of 349.94 ± 79.04 mAh/g and an initial discharge capacity of 113.41 ± 12.59 mAh/g. The results reveal N/S-doped carbon as a sustainable candidate for lithium-ion batteries and other advanced energy storage technologies. 
Co-Authors Alfan Adha Hutama Putra Arikasuci Fitonna Ridassepri Budi Kristiawan Dedi Rohendi Dwi Aries Himawanto Dyah Purwaningsih Eko Prasetya Budiana Fitria Rahmawati Indri Yaningsih Jun Nakamura Kinkind Raras Heliani Shota Sato Syamsul Hadi