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All Journal Pharmaciana: Jurnal Kefarmasian Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Jurnal Riset Kimia IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Surya Abdimas Molekul: Jurnal Ilmiah Kimia Jurnal Ilmu Kefarmasian Indonesia Jurnal Pengabdian Al-Ikhlas Bioscientist : Jurnal Ilmiah Biologi Jurnal Kimia dan Kemasan Jurnal Riset Fisika Indonesia Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis Bencoolen Journal of Pharmacy Rafflesia Journal of Natural and Applied Sciences (RJNAS)
SALPRIMA YUDHA S
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Bengkulu, Bengkulu, 38122, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Science and Technology Indonesia

 1 
Bismuth Silicate/Silica-Titania Synthesis from In Situ Decomposition of Oil Palm Leaves as Silica Source Salprima Yudha S; Morina Adfa; Swadexi Istiqphara; Muhamad Alvin Reagen
Science and Technology Indonesia Vol. 8 No. 3 (2023): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2023.8.3.397-402

Abstract

In this work, bismuth silicate-titania has been synthesized in two stages by utilizing bismuth oxynitrate as an elemental source of bismuth, oil palm leaves (OPL) as a source of silica and titanium tetraisopropoxide (TTIP) as source of titania (TiO2). In the first stage,bismuth silicate/silica (Bi4Si3O12/SiO2) was formed, which occurs due to the in-situ decomposition of palm leaves and reacts directly with the bismuth precursor at high temperatures (900oC). The reaction could possibly occur through a solid-state reaction mechanism between bismuth oxide and silica or through a more complex mechanism within the reaction mixture. The resulting product then reacts with TTIP, which is added and heated at the same temperature to form Bi4Si3O12/SiO2-TiO2 (bismuth silicate/silica-titania). Characterization of the as-prepared product using X-ray diffraction showed the dominance of bismuth silicate and small amount of titania (TiO2). As a result, TiO2 could not be detected in the diffractogram. Nevertheless, an analysis using energy-dispersive X-rays showed the presence of titanium elements in the resulting composite. The results of this study can be used to develop ternary metal oxides based on natural resources and agricultural wastes, such as oil palm leaves.
Molecular Spectroscopic (FTIR and UV-Vis) Analysis and In Vitro Antibacterial Investigation of a Deep Eutectic Solvent of N,N-Dimethyl Urea-Citric Acid Yudha S., Salprima; Angasa, Eka; Reagen, Muhamad Alvin; Kazi, Mohsin
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.167-172

Abstract

The intriguing pursuit of environmentally friendly solvents with tailored properties for diverse applications is a focal point of numerous studies, encompassing precursor selection, thorough characterization, and the exploration of potential applications. The study aims to assess the physicochemical properties and antimicrobial activity of deep eutectic solvents (DES) produced from N,N-dimethyl urea (DMU) and citric acid (CA), highlighting differences from their individual precursors. Various mass ratio variations of (DMU, solid) and (CA, solid) (DMU:CA = 1.0:1.0; 1.0:1.5; 1.0:2.0; 2.0: 1.0; 1.5:1.0) have been tested to make DES solvents through the melt process. Both types of blends generally melt at a temperature of 80°C. The overall liquid resulting from the melting of solids was generally clear in color. Molecular analysis using an infrared spectrophotometer showed some insignificant shifts from one product to another, compared with DMU and CA as precursors. Likewise, analysis using a UV–Vis spectrophotometer, when the entire sample was dissolved in demineralized water (2 mg/mL), showed no difference in the spectrum. In addition, functional group analysis using a spectrophotometer showed some minor changes, mainly shifts in peaks due to changes in the DMU:CA ratio. This may be due to the interaction of the hydrogen donor and the hydrogen acceptor in DES. All samples showed absorption peaks in the ultraviolet region of 202-210 nm. The resulting DES application showed growth inhibitory activity for Staphylococcus aureus and Escherichia coli bacteria in all products produced. The same analysis of the two types of precursors used showed that only CA had activity, but DMU did not have similar activity.
Oil Palm Leaves as an In-situ Bio-silica Source in Sustainable Synthesis of V2O5-SiO2 Yudha S., Salprima; Adfa, Morina; Wibowo, Risky Hadi; Reagen, Muhamad Alvin
Science and Technology Indonesia Vol. 10 No. 4 (2025): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.4.1148-1155

Abstract

Using ammonium vanadate and natural silica from oil palm leaves in situ at 900oC is a sustainable synthesis method for producing V2O5-SiO2 mixed oxides in the form of a brownish powder. Therefore, this study aims to investigate a more environmentally friendly alternative to synthesizing V2O5-SiO2 using oil palm leaves, a by-product from oil palm farming. The XRD analysis of the reaction products showed specific V2O5 peaks and broadened peaks, indicating the presence of amorphous silica. The Fourier transform infrared (FTIR) analysis, which revealed the presence of Si-O-Si and Si-O-V functional groups, also supported the characteristic assessment. In addition, X-ray fluorescence (XRF) analysis showed that V2O5 (46.70 mass%) and SiO2 (52.60 mass%) were present, along with small amounts of other possible metal oxides, such as P2O5, K2O, CaO, Fe2O3, Al2O3, and PdO.
Co-Authors Afra Wafiqah Azhar Agus Martono H. Putranto Alvin Reagen, Muhamad Anisa Ulya Darajat Annisa Ramadhani Aritonang, Anthoni Batahan Arman, Etriyanto Asdim Asdim Askhan, Jimmy Aswin Falahudin Aswin Falahudin Aswin Falahudin Aswin Falahudin Aswin Falahudin Aswin Falahudin Aswin Falahudin Avidlyandi, Avidlyandi Azhar, Afra Wafiqah Bambang Trihadi Buistu Arba’a Nuyuh Putri Charles Banon Demi Dama Yanti Dennie Oktrin Wicaksono Dominica, Dwi Doni Notriawan Dwita Oktiarni Efendi, Pahran Eka Angasa Eka Angasa Falahudin, Aswin Fatan Umbara Febriansyah, Rahmaga Herlina Herlina Herlina Herlina I Putu Mahendra Ika Diana Evita Insin, Numpon Irfan Gustian Irfan Gustian Irfan Gustian Irfan Gustian John Hendri Kazi, Mohsin Khafit Wiradimafan Liana Wahyuni Liesaiani Daefisal, Octakireina M. Rafi Mardlia, Zulfikri Achid Mifta Violina Aniza Morina Adfa Morina Adfa Muhamad Alvin Reagen Munifilia Ekasari Nasution, Riski Padilah Nazarudin Nazarudin Nazarudin Nesbah Nesbah Nesbah, Nesbah Noor Haida Mohd Kaus Notriawan, Doni Nurhasana, Devi Octakireina Liesaini Daefisal Oman Zuas Oman Zuas Perdani, Meka Saima Putri, Yona Putri, Yona Harianti Rahmawati, Reza Rais Akbar Syahputra Reagen, Muhamad Alvin Reza Pertiwi Reza Pertiwi Reza Pertiwi Riski Padilah Nasution Risky Hadi Wibowo Risky Hadi Wibowo Saiqa Ikram Saiqa Ikram Setyo Eko Nugroho Nugroho Sirikanjana Thongmee Sri Ningsih Suli Anggria Murni Supriati, Rochmah Suripto D Yuwono Swadexi Istiqphara Swadexi Istiqphara Swadexi Istiqphara Swadexi Istiqphara, Swadexi Syalfinaf Manaf Teja Dwi Sutanto Triawan, Deni Agus Umi K Yaumidin Wibowo, Risky Hadi Wuri Prameswari Yaumidin, Umi K Yuwono, Suripto D