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All Journal Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Indonesian Journal of Chemical Science ALCHEMY Jurnal Penelitian Kimia BERNAS: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat Indonesia Molekul: Jurnal Ilmiah Kimia International Journal of Renewable Energy Development Jurnal Rekayasa Proses
Yuniawan Hidayat
Universitas Sebelas Maret
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Neuroscience Nursing Public Health Social Sciences Veterinary Other

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N/S-doped carbon electrode derived from paper waste as a sustainable electric double-layer capacitor Rahmawati, Fitria; Aini, Nur; Ridwan, Qanita; Paramartha, I Gusti Ayu Filia; Putri, Denis Octareta Amelia; Saputri, Dini Deviana; Nugrahaningtyas, Khoirina Dwi; Heraldy, Eddy; Hidayat, Yuniawan; Nurcahyo, I. F.; Anggraningrum, Ivandini Tribidasari
International Journal of Renewable Energy Development Vol 14, No 3 (2025): May 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60846

Abstract

This research aims to produce N/S-doped Carbon Electrode derived from paper waste (NSCEp) for Electric Double-Layer Capacitor (EDLC). The paper waste holds potential as raw material for carbon production because of its high cellulose content, abundance of availability, and low price. To enhance the electrical performance of the carbon, an activation step was conducted, followed by double doping with nitrogen and sulfur using thiourea. The NSCEp result was analysed to examine its specific diffraction peaks, crystallinity, morphology, and elemental contents. The NSCEp powder was then mixed with dispersant to produce a homogeneous slurry for the electrode film. The EDLC was assembled in a sandwich-like structure, with sodium hydroxide (NaOH) solution impregnated in a separator between the carbon film electrodes. The EDLC assembly was conducted under an argon atmosphere in a CR2032 coin cell. The results found that the NSCEp provides a high electrical conductivity of 1.21 x 102 S/cm. The prepared EDLC achieved the specific capacitance value of 39.555 F/g as determined by cyclic voltammetry (CV) analysis. Furthermore, the EDLC demonstrates high initial charge-discharge capacities of 300.56 mAh/g and 248.88 mAh/g, respectively, at a current of 0.015 A/g. The capacity remains stable for up to 300 charge-discharge cycles.
Optimalisasi Pengelolaan Sampah Rumah Tangga Menjadi Kompos Dan Produk Kreatif Di Bank Sampah Permata, Desa Kembaran Siswandari, Siswandari; Hidayat, Yuniawan; Sutrisno, Joko
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 2 (2025)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v6i2.12907

Abstract

Pengelolaan sampah rumah tangga perlu dilakukan secara komprehensif dan terpadu dari hulu ke hilir agar memberikan manfaat secara ekonomi, sehat bagi masyarakat dan aman bagi lingkungan serta dapat mengubah perilaku masyarakat. Seperti yang dilakukan oleh Bank Sampah Permata Desa Kembaran. Akan tetapi dalam pelaksanaannya belum maksimal. Peran bank sampah permata saat ini baru sebatas pengepul sampah non-organik yang masih bisa dijual kembali. Bank Sampah Permata pada dasarnya memiliki potensi dan peluang untuk terus berjalan. Hal ini disebabkan karena dukungan pemerintah setempat cukup besar pada bank sampah ini. Akan tetapi kondisi tersebut belum diimbangi dengan kesadaran dan pengetahuan warga setempat sebagai anggota bank sampah permata dalam menanggulangi permasalahan sampah. Khususnya dalam pemahaman pentingnya pemilahan sampah rumah tangga (sampah organik dan non-organik). Oleh karenanya kegiatan optimalisasi pengelolaan sampah rumah tangga di Desa Kembaran dilakukan melalui edukasi tentang pemilahan sampah, pelatihan ecobrick, pendampingan pengelolaan sampah organik dan pelatihan kewiraushaan agar diperoleh hasil yang maksimal
Studi awal kestabilan struktur katalis logam transisi periode pertama berbasis HZSM-5 Nugrahaningtyas, Khoirina Dwi; Zalfa, Syafira Nur; Rahmawati, Fitria; Nurcahyo, I.F.; Hidayat, Yuniawan
Jurnal Rekayasa Proses Vol 17 No 1 (2023): Volume 17, Number 1, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.76449

Abstract

Katalis logam transisi periode pertama (Fe, Co, Ni, Cu, atau Zn) berbasis Hydrogen Zeolite Socony Mobil – 5 (HZSM-5) merupakan katalis yang menjanjikan untuk berbagai macam reaksi. Pada penelitian ini akan dipelajari keperiodikan aktivitas dan kestabilan struktur katalis tersebut pada reaksi cracking anisol. Uji katalitik dilakukan dengan menggunakan reaktor semi alir. Produk dari hasil proses cracking anisol dianalisis menggunakan kromatografi gas-spektra massa (GC-MS), kemudian karakter katalis bekas seperti kristalinitas dan komposisi fasa dianalisis menggunakan X-ray diffraction (XRD), sedangkan luas permukaan dan porositas dianalisis menggunakan surface area analyzer (SAA). Hasil penelitian menunjukkan bahwa tidak nampak kaitan antara sifat periodik unsur dengan aktivitas katalitiknya. Karakter setiap katalis yang telah digunakan mengalami sedikit perubahan pada komposisi fasanya, terutama katalis Fe/HZSM-5 dan Co/HZSM-5, sedangkan luas permukaan dan porositasnya mengalami penurunan.
Pelatihan Keselamatan Bahan Gas Berbahaya Untuk Teknisi Mesin Pendingin Nurcahyo, I F; Heraldy, Eddy; Rahmawati, F; Nugrahaningtyas, Khoirina D; Hidayat, Yuniawan
Jurnal Pengabdian Masyarakat Indonesia Vol 4 No 1 (2024): JPMI - Februari 2024
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpmi.2031

Abstract

Pelatihan keselamatan bahan gas berbahaya untuk teknisi mesin pending telah dilaksanakan untuk teknisi mesin pendingin yang tergabung dalam paguyuban Aneka Jasa Teknik Surakarta (AJTS). Kecelakaan kerja berkaitan dengan gas freon banyak diberitakan di dunia maya. Paguyuban AJTS merupakan perkumpulan dari teknisi yang banyak berkecimpung sebagai teknisi mesin pendingin terutama AC, kulkas, dan freezer di Solo Raya. Pelatihan ini penting untuk dilakukan untuk membekali teknisi tersebut agar selamat dalam perakitan dan perbaikan mesin pendingin. Pelatihan ini dilaksanakan secara luring meliputi ceramah keselamatan bahan, praktek mengenal MSDS, dan praktek mendeteksi kebocoran gas freon menggunakan alat leaking detektor. Hasil pelatihan antara lain: peserta paham tentang bahaya gas freon dan pencegahan kecelakaan kerja dalam penanganan mesin pendingin. Pelatihan sangat bermanfaat bagi teknisi mesin pendingin terutama peserta pelatihan dan pembaca artikel ini, sehingga keselamatan kerja dapat tercapai.
The Density Functional Tight Binding (DFTB) Approach for Investigating Vacancy and Doping in Graphene as Hydrogen Storage Hidayat, Yuniawan; Rahmawati, Fitria; Dwi Nugrahaningtyas, Khoirina; Bagus Swandito, Paulus
Jurnal Riset Kimia Vol. 15 No. 1 (2024): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v15i1.635

Abstract

A study on graphene defects for hydrogen storage has been successfully conducted using the Density Functional Tight Binding (DFTB) approach. The research aimed to modify solid materials for hydrogen storage. A 4 × 4 × 1 unit cell was used as the basis, while the supercell used for sampling was enlarged to 40 × 40 × 1. The analyzed data included changes in Density of States (DOS), Fermi level shifts, electronic band structures, formation energy, adsorption energy, and isosurfaces for each graphene orientation. It has been observed that modifying the surface structure of graphene can alter the electronic properties of graphene. This is indicated by shifts in DOS intensity, characterized by increased electronic intensity around the Fermi level total density charge different. The interaction energy between graphene and hydrogen gas has been determined to be -0.0155 eV for H-epoxy graphene, -0.4941 eV for H-monovacancy graphene, and -0.0424 eV for HN-monovacancy graphene. The presence of the vacancy increase the potential to adsorp hydrogen.
The Impact of pH Preparation on the Physical Nature and Metal Phase of Zeolite-Supported Metal Catalyst Nugrahaningtyas, Khoirina Dwi; Budiman, Anatta Wahyu; Sabiila Gusti, Aji Indo; Heraldy, Eddy; Hidayat, Yuniawan
Jurnal Riset Kimia Vol. 15 No. 2 (2024): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v15i2.678

Abstract

The synthesis of CoMo/USY catalysts has been widely carried out. However, the bond strength between metal and USY is still a problem. Therefore, this research has synthesised the catalyst with the chelating agent ethylenediaminetetraacetate (EDTA). Apart from that, the effect of pH on the characteristics of the catalyst is also reviewed. This research aims to analyse the effect of preparation pH on catalyst characteristics. In the preparation process, the pH of the solution is set at values of 2, 7, and 8. Catalyst activation includes a calcination process and reduction. The catalyst characterisation uses XRD, GSA, and FTIR instruments to determine phase composition, specific surface area, and functional groups. The result showed that pH preparation significantly influenced the metal loading on the catalyst and reached a maximum at pH 8. The surface area is not directly related to the pH of the preparation but has the opposite property depending on the amount of metal added. Meanwhile, it was found that the CoO and MoO3 phases were achieved on the catalyst by all pH preparations. On the other hand, the CoMo alloys are present on the catalyst at pH 7 and 8, while the Co and Mo elements are visible at pH 2. The difference in pH during the synthesis process impacts the shift in the absorption wave number of the OH vibration.
Co-Authors Ana Sofiana, Ana Arif R. Hakim, Arif Arifin Dwi Saputro, Arifin Dwi Bagus Swandito, Paulus Budiman, Anatta Wahyu Candra Purnawan Dwi Nugrahaningtyas, Khoirina Eddy Heraldy Edi Pramono Edy Pramono Fadlulloh, Zaki Fitria Rahmawati Hendrastuti, Priska Julia I F Nurcahyo, I F IF. Nurcahyo, IF. Ivandini Tribidasari Anggraningrum Jati Wulansari, Jati Joko Sutrisno Khoirina Dwi Nugrahaningtyas Mudjijono Mudjijono, Mudjijono Nugrahaningtyas, Khoirina D Nur Aini Nurcahyo, I. F. Nurcahyo, I.F. Nurcahyo, Idul Fitri Paramartha, I Gusti Ayu Filia Patiha Patiha, Patiha Putri, Denis Octareta Amelia Qurrotul'aini, Nisriina 'Abidah Rahmawati, F Ridwan, Qanita Sabiila Gusti, Aji Indo Saputri, Dini Deviana Sayekti Wahyuningsih Siswandari Siswandari, Siswandari Tiara Diah Saputri, Tiara Diah Triyono . Wega Trisunaryati, Wega Zalfa, Syafira Nur