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I Wayan Sutapa
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wayansutapa@fmipa.unpatti.ac.id
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Department of Chemistry, Faculty Mathematics and Natural Science, Pattimura University, Ambon, Maluku
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
  • Website
Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : 10.30598//ijcr.2021.-irm
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science
Indo. J. Chem. Res. is a journal that regularly publishes primary articles covering all branches of chemistry and its sub-disciplines. Published articles consist of complete research, short communication, and review articles. The scope of published articles is not limited to inorganic chemistry, physical chemistry, organic chemistry, analytical chemistry, and biochemistry. Editors can invite articles review of authors that includes the latest developments in the field of interest of certain chemicals. A contribution is open to researchers from all countries.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 314 Documents
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Effectiveness of Montmorillonite-ZnO as Photocatalyst for Adsorption and Degradation of Methylene Blue Nur, Abdillah Mushawwir An; Iklima, Ilma Kanzu; Hidayat, Taupik; Dasna, I Wayan; Sumari, Sumari; Utomo, Yudhi
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-abd

Abstract

This study aims to synthesize, characterize, and evaluate the photocatalytic activity of a montmorillonite–ZnO (MMT/ZnO) composite for the degradation of methylene blue (MB) under ultraviolet (UV) and dark (non-UV) conditions. The composite was prepared by mixing synthetic montmorillonite derived from Indonesian soil with ZnO in ethanol, followed by calcination at 400 °C for 2 hours, and subsequently characterized using X-ray fluorescence (XRF). The degradation tests were performed using various composite masses (0.5–2.5 g) and compared with single ZnO and montmorillonite materials through visible spectrophotometry analysis. The results revealed that under UV irradiation, MMT/ZnO achieved the highest degradation efficiency of 98.37%, while under non-UV conditions, MB removal remained high at 88.39%, primarily driven by adsorption. These findings confirm a synergistic effect between the adsorption capacity of montmorillonite and the photocatalytic activity of ZnO, where adsorption dominated MB removal while photocatalysis contributed to enhancing overall degradation efficiency. The novelty of this study lies in the utilization of synthetic Indonesian montmorillonite as a ZnO support, which enhances photocatalytic efficiency while reducing production costs. This finding highlights the potential of MMT/ZnO composites as an environmentally friendly and cost-effective alternative for dye wastewater treatment in the textile industry.
Simultaneous Saccharification and Fermentation of Sugarcane Bagasse by Saccharomyces Cerevisiae and Zymomonas Mobilis Ginting, Elfrida; Siregar, Ecclesia; Dewi, Ratna Sari; Simatupang, Lisnawaty; Yusfiani, Marnida; Sembiring, Jhony Hartanta
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-elf

Abstract

Sugarcane bagasse represents a promising lignocellulosic feedstock for second-generation bioethanol production. This study evaluated the performance of immobilized Simultaneous Saccharification and Fermentation (SSF) systems using Saccharomyces cerevisiae and Zymomonas mobilis for ethanol production from alkali-pretreated sugarcane bagasse. Delignification using 10% NaOH enhanced cellulose accessibility for enzymatic hydrolysis by immobilized Aspergillus niger. SSF was conducted under anaerobic conditions at 30°C for 80 h. Reducing sugar dynamics, physicochemical properties, FTIR spectra, and GC analysis were used to evaluate ethanol formation and quality. The SSF system employing S. cerevisiae produced a higher ethanol concentration (2.83% v/v) and purity (99.77%) compared to Z. mobilis (2.20% v/v; 89.92%). Although higher residual reducing sugars were observed in the Z. mobilis system, ethanol conversion efficiency remained lower, indicating metabolic limitations under SSF conditions. FTIR and GC analyses confirmed ethanol formation with high water content in both distillates. These results demonstrate that microbial robustness plays a critical role in immobilized SSF performance, with S. cerevisiae exhibiting superior fermentative stability and ethanol yield compared to Z. mobilis.
Intermolecular Characterization of Chitosan from the Exoskeleton of Windu Prawn (Penaeus monodon) and Mangrove Crab (Scylla sp.) Arista, Rini Anggi; Nugraheni, Dian; Qomaliyah, Eka Nurul; Mulyati, Yayuk; Maulana, Jibril; Dewi, Kadek Risa Rivana; A'yuni, Shahira Qistan
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-rin

Abstract

Chitosan (C6H11NO4)n is a chitin-derived polymer that has good biocompatibility, biodegradability, and bioabsorbability properties. This compound can be obtained from exoskeleton waste such as mangrove crabs and Windu prawn. This study aims to evaluate the comparison of chitosan levels based on the degree of deacetylation (%DD) from the waste shell, head, and leg of Windu prawn and mangrove crab shell waste obtained from the coastal area of Pasuruan, East Java. The extraction method was carried out through the stages of deproteinization, demineralization, and deacetylation using an alkaline solution, and then the characterization of molecular structure and %DD was carried out using an FTIR spectrophotometer. The results showed that chitosan from Windu prawn shell had the highest %DD of 73.0%, while mangrove crab shell and prawn head and leg showed lower values of 55.3% and 63.9%. This difference in %DD value indicates a variation in the success rate of deacetylation due to differences in biomaterial composition. The results of SEM testing showed that the use of the type of material in the manufacture of chitosan would affect the results of the surface morphology produced, where the Windu prawn shell produced the flattest surface.
Utilization of Lignin from Oil Palm Empty Fruit Bunches (OPEFB) for the Fabrication of Eco-Friendly Superhydrophobic Sponges Kumalasari, Meiyanti Ratna; Nainggolan, Yuni Damayanti; Nababan, Jesika; Isaura, Anastasya; Simbolon, Wenika; Togatorop, Hana Esrani; Saputra, Rizki Rachmad; Beladona, Siti Unvaresi Misonia; Saputra, Ozi Adi
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-mei

Abstract

The escalation of crude oil exploitation poses significant risks of leakage and oil spills in the oceans. Therefore, this research aims to synthesize superhydrophobic sponges utilizing lignin derived from Oil Palm Empty Fruit Bunch (OPEFB) waste. Lignin was isolated from OPEFB with the addition of 15% NaOH, followed by neutralization and purification using H₂SO₄, which yielded a recovery of 30.3%. Subsequently, melamine sponges were modified via a facile dip-coating technique using a mixture of lignin, Polydimethylsiloxane (PDMS), and (3-aminopropyl)triethoxysilane (APTES). The physicochemical properties and material performance were characterized using 1H-NMR, FTIR, and Water Contact Angle (WCA) measurements. 1H-NMR analysis confirmed the successful isolation of the lignin structure, while FTIR spectra verified the effective deposition of the silane-lignin layer on the sponge skeleton. Contact angle analysis results indicated a significant surface transformation, where the sponge shifted from a superhydrophilic nature 0° to a highly superhydrophobic state (170.91°). With such performance, this material holds great potential as an effective, eco-friendly adsorbent for oil spill remediation in aquatic environments.

Page 32 of 32 | Total Record : 314

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