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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Communications in Science and Technology Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Pengabdian Masyarakat Waradin Jurnal Pengabdian Kepada Masyarakat Meambo
Hendri, Yola Bertilsya
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Pembuatan Mortar Geopolimer Berbasis Palm Oil Fly Ash-Grafena (Pofa-Grafena) Dengan Variasi Rasio Pofa/Pasir Dan Berat Grafena Yola Bertilsya Hendri; Amun Amri; Rozanna Sri Irianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Geopolymer mortar is a mortar produced by reacting a high concentrated alkaline solution with precursors containing high alumina and silica contents. The use of geopolymer mortar can replace the use of ordinary portland cement (OPC) in the construction industry. Thisresearch aims to synthesize palm oil fly ash (POFA) based geopolymer mortar with the addition of graphene nanosheets, to determine the effect of POFA-to-sand composition ratio, and variations of graphene to mechanical properties and morphology of geopolymer mortar. The research was conducted by varying the ratio of POFA-to-sand (1:0, 1:1, 1:2, and 2:1 by mass ratio), variations of graphene (0, 0,1, 0,35, and 0,5% by weight), curing time (24 h) and curing temperature (60℃). Scannning Electron Microscope (SEM) analysis showed that the addition of sand and graphene reduced the porosity of geopolymer mortar. The compressivestrength test results showed that the highest compressive strength (16,4 MPa) was obtained at POFA-to-sand ratio of 2:1 and 0,5% wt graphene content. While the lowest compressive strength (5,4 MPa) was obtained at the POFA-to-sand ratio of 1:2 and 0% wt graphenecontent.Keywords: alumina, silica, alkaline activator, crystalline, geopolymerization
Pembuatan Sabun Cair dari Minyak Sawit di Desa Batu Belah Kabupaten Kampar Zuqni Meldha; Idral Amri; Zulfansyah Zulfansyah; Hari Rionaldo; Syamsu Herman; Nirwana Nirwana; Lisa Legawati; Salma Liska; Yogi Yolanda; Yola Bertilsya Hendri; Alltop Amri Ya Habib
Jurnal Pengabdian Masyarakat Waradin Vol. 5 No. 2 (2025): Jurnal Pengabdian Masyarakat Waradin
Publisher : Sekolah Tinggi Ilmu Ekonomi Pariwisata Indonesia Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56910/wrd.v5i2.643

Abstract

The demand for natural self-care products is rising as more people recognize the value of keeping healthy skin and protecting the environment. Cooking oil, which is a derivative of palm oil, is an ingredient that is easily found by people in Batu Belah Village, Kampar Regency. This material has great potential to be processed into value-added products such as liquid soap. This study focuses on the use of cooking oil as the primary ingredient for producing liquid soap, while also opening new economic opportunities for the village community. This initiative captured the interest of Batu Belah People.In an attempt to implement the technology, the community service team distribute the liquid soap to the neighborhood.
Workshop Pengenalan Bahan Kimia Berbahaya dan Penanganannya di Laboratorium Kimia SMA Negeri 6 Tualang Sugesti, Heni; Chandra, Yogi; Yola Bertilsya Hendri; Lisa Legawati; Salma Liska
Jurnal Pengabdian Meambo Vol. 4 No. 2 (2025): Jurnal Pengabdian Kepada Masyarakat MEAMBO
Publisher : PROMISE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56742/jpm.v4i2.137

Abstract

Kurangnya pengetahuan dan pemahaman mengenai penanganan bahan kimia berbahaya dan keselamatan berkerja di laboratorium dapat mengakibatkan terjadinya kecelakaan saat praktikum. Kegiatan pengabdian ini bertujuan untuk meningkatkan pengetahuan dan pemahaman siswa serta guru mata pelajaran kimia terhadap bahaya penggunaan bahan kimia berbahaya di laboratorium sekolah serta cara penanganannya yang cepat dan tepat. Workshop ini dilaksanakan di SMA Negeri 6 Tualang pada bulan April 2025 dengan melibatkan guru mata pelajaran Kimia dan siswa kelas XI sebanyak 38 orang. Metode yang digunakan meliputi tahapan persiapan dengan melakukan koordinasi awal dengan pihak sekolah untuk memperoleh informasi terkait kondisi laboratorium, penyampaian materi melalui presentasi interaktif, diskusi kelompok, demonstrasi langsung mengenai identifikasi bahan kimia berbahaya, prosedur penyimpanan, penggunaan alat pelindung diri (APD), penanganan limbah dan simulasi ketika terjadi kecelakaan kerja di laboratorium serta tahapan evaluasi berupa observasi langsung dan pemberian kuesioner berupa pre test dan post test. Hasil dan kesimpulan kegiatan ini menunjukkan adanya peningkatan pengetahuan dan pemahaman peserta mengenai klasifikasi-klasifikasi bahan kimia berbahaya, simbol bahaya, dan prosedur keselamatan kerja di laboratorium. Hal ini ditunjukkan melalui peningkatan signifikan nilai rata-rata dari pre-test ke post-test dan kegiatan ini juga berkontribusi dalam menumbuhkan budaya keselamatan di lingkungan sekolah serta memperkuat kesiapan siswa dalam mengikuti praktikum kimia dengan lebih bertanggung jawab.
Artikel Review: Efektivitas Mikroorganisme untuk Pengomposan Tandan Kosong Sawit secara Berkelanjutan Legawati, Lisa; Maarasyid, Cici; Meldha, Zuqni; Liska, Salma; Yolanda, Yogi; Hendri, Yola Bertilsya; Ermal, Dini Aulia Sari; Elsa, Nesa Zafira
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 3 (2025): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i3.47603

Abstract

Empty Fruit Bunches (EFB) of oil palm are the main solid waste generated by the palm oil industry, with an increasing volume and high lignocellulosic content that can affect the decomposition process. This article aims to review the effectiveness of various microorganisms as bioactivators in EFB composting based on experimental studies and recent literature. The review results indicate that using microbial consortia such as Trichoderma spp., cellulolytic bacteria, and local microorganisms (MOL) is more effective than single microorganisms in reducing the C/N ratio to levels approaching the compost quality standard (<20). Aerobic composting methods with proper aeration management and the addition of organic materials can also accelerate decomposition. Further research is recommended to examine the interactions among microorganisms within the consortia and to conduct application trials to validate the agronomic benefits of EFB compost sustainably. 
Enhancement in thermal stability and surface properties of LiFePO4/VFLG composite prepared via sol-gel route Amri, Amun; Bertilsya Hendri, Yola; Sunarno; Dwi Setyo Pambudi, Yoyok; Assylzhan, Mazhibayev; Elmira, Kambarova; Ain, Khusnul; Jumbri, Khairulazhar; Tao Jiang, Zhong; Yang, Chun-Chen
Communications in Science and Technology Vol 10 No 1 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.1.2025.1667

Abstract

Thermal and surface properties of LiFePO4/very-few-layer graphene (LiFePO4/VFLG) composite manufactured through the sol-gel route have been researched for lithium-ion battery cathode application. VFLG was acquired from a facile, cost-effective, and environmentally benign fluid dynamic shear exfoliation process. The composites were characterized through thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), field-emission scanning electron microscopy (FESEM) interlinked with energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and Braneur-Emmett-Teller (BET) analysis. The TGA-DSC results showed that the integration of VFLG could enhance the thermal stability of the composite by inhibiting oxygen diffusion on the LiFePO4 surface. FESEM-EDX analysis, meanwhile, confirmed the homogeneously distributed VFLG in the composites. TEM results revealed that the average particle sizes of the composites decreased by about 21.2% compared to the bare LiFePO4. TEM and HRTEM results confirmed an intimate contact between VFLG intimately and LiFePO4 particles via plane-to-point contact, contributing to the control and reduction of particle size. Furthermore, physisorption via BET analysis revealed that incorporating VFLG provided a wider distribution of mesopores and increased pore diameter and pore volume by 128.7% and 656.3%, respectively, compared to sole LiFePO4. These significant improvements were related to the flexibility and ability of a thin layer of VFLG to limit the growth of LiFePO4 particles. This approach offers a promising strategy to enhance the thermal stability and surface properties of lithium-ion battery cathodes.
Pengembangan Katalis Water-Gas Shift: Perspektif dari Sistem Medium Temperature Shift (MTS) Liska, Salma; Sajida, Gita Nur; Legawati, Lisa; Suhendri, Suhendri; Meldha, Zuqni; Yolanda, Yogi; Hendri, Yola Bertilsya; Rusmana, Marcela Anandita
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 3 (2025): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i3.48117

Abstract

The water-gas shift (WGS) reaction is a crucial process for increasing hydrogen (H₂) production by minimizing carbon monoxide (CO) content. It is widely applied in the petrochemical industry to reduce CO levels in syngas produced from hydrocarbon reforming. Conventionally, this reaction is conducted in two stages: high-temperature shift (HTS) and low-temperature shift (LTS). However, this approach presents both technical and economic limitations. To address these issues, catalysts capable of operating optimally at intermediate temperatures—referred to as medium-temperature shift (MTS)—have been developed. The scope of discussion in this article consists of catalyst development challenges such as sintering, deactivation, and side reactions. This review is intended to serve as a reference for the development of efficient WGS catalysts under MTS conditions, along with modification strategies aimed at enhancing their performance based on current research findings.
STRATEGIES FOR ENHANCING THE PERFORMANCE OF LI [NIXCOYMN1-X-Y] O2 CATHODE MATERIALS FOR LI-ION BATTERIES HENDRI, YOLA BERTILSYA; Heni Sugesti; Zuqni Meldha; Lisa Legawati; Salma Liska; Yogi Yolanda; Amun Amri
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 7 No. 2 (2025): Literasi Artikel Penelitian Kimia
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v7i2.6193

Abstract

Abstract Li[NixCoyMn1-x-y]O2 layered oxides Cathode Materials are among the most widely studied cathode materials for lithium-ion batteries due to their high gravimetric and volumetric energy density compared to other type cathode materials. However, the practical deployment of Ni-rich NCM materials is hindered by severe degradation mechanisms, including cation-mixing, surface reconstruction, electrolyte reactivity, transition metal dissolution, and oxygen release, which compromise cycling stability and safety. This review systematically synthesizes recent progress in advanced modification strategies designed to mitigate degradation in Li[NixCoyMn1-x-y]O2 cathodes. The discussion is structured into four major approaches: (i) surface modification, which employs protective coatings to suppress interfacial reactions and stabilize the cathode–electrolyte interphase; (ii) elemental doping, which strengthens the lattice, reduces cation mixing, and inhibits oxygen evolution; (iii) single-crystal engineering, which eliminates grain-boundary failure and improves thermal stability; and (iv) concentration-gradient architectures, which alleviate internal stress and enhance the durability of Ni-rich cathodes. Empirical evidence demonstrates that these strategies not only extend cycle life but also provide mechanistic insights into the underlying degradation pathways. By consolidating findings from recent experimental, this review highlights the necessity of integrating structural, chemical, and morphological interventions to realize the full potential of Ni-rich NCM cathodes. The insights presented offer a framework for designing safer, higher-performance, and commercially scalable lithium-ion batteries. Abstrak Li[NixCoyMn1-x-y]O2 berbasis oksida berlapis merupakan salah satu material katoda yang paling banyak dikaji dalam pengembangan baterai litium-ion. Keunggulan utamanya terletak pada kerapatan energi gravimetri dan volumetri yang lebih tinggi dibandingkan dengan jenis katoda lain. Namun demikian, penerapan praktis material NCM kaya nikel masih menghadapi sejumlah kendala serius akibat berbagai mekanisme degradasi, antara lain pencampuran kation, rekonstruksi permukaan, reaktivitas dengan elektrolit, pelarutan logam transisi, serta pelepasan oksigen. Mekanisme-mekanisme tersebut secara langsung menurunkan stabilitas siklus dan tingkat keselamatan baterai.Ulasan ini menyajikan sintesis sistematis mengenai perkembangan mutakhir strategi modifikasi lanjutan yang dirancang untuk menekan degradasi pada katoda Li[NixCoyMn1-x-y]O2. Terdapat empat pendekatan utama yang dibahas, yaitu: (i) modifikasi permukaan, melalui penerapan lapisan pelindung guna menekan reaksi antarmuka dan menstabilkan lapisan katoda–elektrolit; (ii) doping unsur, yang berfungsi memperkuat struktur kisi, mengurangi pencampuran kation, serta menekan evolusi oksigen; (iii) rekayasa kristal tunggal, yang mengatasi kegagalan pada batas butir sekaligus meningkatkan stabilitas termal; dan (iv) arsitektur gradien konsentrasi, yang mampu meredam tegangan internal dan memperpanjang daya tahan katoda kaya nikel. Hasil-hasil empiris menunjukkan bahwa penerapan strategi tersebut tidak hanya memperpanjang umur pakai siklus, tetapi juga memperkaya pemahaman tentang mekanisme degradasi yang mendasari. Dengan mengintegrasikan temuan-temuan eksperimental terbaru, ulasan ini menegaskan pentingnya perpaduan intervensi struktural, kimia, dan morfologis untuk mengoptimalkan kinerja katoda NCM kaya nikel. Wawasan yang dihadirkan sekaligus menawarkan kerangka konseptual bagi pengembangan baterai litium-ion yang lebih aman, berkapasitas tinggi, dan memiliki prospek komersialisasi yang luas.
Co-Authors Amun Amri Assylzhan, Mazhibayev Chandra, Yogi Cici Maarasyid Dini Aulia Sari Ermal Dwi Setyo Pambudi, Yoyok Elmira, Kambarova Habib, Alltop Amri Ya Hari Rionaldo Heni Sugesti Idral Amri Jumbri, Khairulazhar Khusnul Ain Lisa Legawati Nirwana Nirwana Rozanna Sri Irianty Rusmana, Marcela Anandita Sajida, Gita Nur Salma Liska Sugesti, Heni Suhendri Suhendri SUNARNO Syamsu Herman Tao Jiang, Zhong Yang, Chun-Chen Yolanda, Yogi Zafira, Nesa Zulfansyah Zulfansyah Zuqni Meldha