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All Journal JURNAL KIMIA SAINS DAN APLIKASI Abdimas Indonesian Journal of Cancer Chemoprevention Jurnal Riset Kimia agriTECH Indonesian Journal of Chemical Science Journal of Physics and Its Applications ABDIMAS SILIWANGI JKPK (Jurnal Kimia dan Pendidikan Kimia) Molekul: Jurnal Ilmiah Kimia Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Indonesian Journal of Chemical Science
Mohammad Alauhdin, Mohammad
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Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Engineering Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences

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Performance Comparison of Large-Core Optical Waveguides with Waste-Derived and Analytical-Grade Chitosan Core Materials Yulianti, Ian; Rizkika, Aflah Agus; Darma Putra, Ngurah Made; Alauhdin, Mohammad; Astuti, Budi; Wiwit Prayitno, Wasi Sakti; Prayogo, Deffrian; Mufatihah, Nishfa; Athoriq, Naufal
Journal of Physics and Its Applications Vol 8, No 1 (2026): February 2026
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v8i1.30500

Abstract

This study investigates and compares the optical performance of large-core polymer waveguides fabricated using shrimp-shell-derived chitosan (SSC) and analytical-grade chitosan (AGC) as core materials. Both materials were processed into a buried square-core waveguide configuration and evaluated through optical loss measurements, time-dependent loss (TiDL), temperature-dependent loss (TDL), and microstructural examination. The two chitosan types exhibited their lowest attenuation at a concentration of 0.04 g/mL, with AGC showing marginally lower optical loss, consistent with its higher purity and degree of deacetylation. AGC also demonstrated superior temporal and thermal stability, supported by SEM results indicating a smoother and more homogeneous core morphology. Nevertheless, SSC showed performance levels closely comparable to AGC, revealing that biowaste-derived chitosan can function effectively as a core material for large-core waveguides. This outcome underscores the potential of SSC as a sustainable, low-cost alternative, contributing to SDG 12 (Responsible Consumption and Production) through biowaste valorization, and SDG 9 (Industry, Innovation, and Infrastructure) by promoting eco-friendly materials for future optical sensor platforms. The results affirm that SSC-based waveguides hold promise for applications including humidity, pH, chemical, and biochemical sensing.
Synthesis and Characterization of Sucrose-Modified CaO Catalyst Derived from Dolomite for Transesterification of Reutealis trisperma Oil Widiarti, Nuni; Julianti, Belia Anggi Sri; Alauhdin, Mohammad; Rosanti, Yuan Maylia
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i3.103570

Abstract

This study presents a novel method for synthesizing solid base catalysts by modifying calcium oxide (CaO) from dolomite via a sucrose-mediated hydrothermal process. In this approach, sucrose acts as a complexing agent to remove magnesium ions (Mg²⁺), a structure-directing agent, and a carbon-based template. After Mg²⁺ removal, calcium species were recovered through coprecipitation using sodium carbonate. The synthesized catalysts were characterized to evaluate their structure using X-ray diffraction (XRD), identify functional groups via Fourier-transform infrared spectroscopy (FTIR), observe morphology and elemental composition through scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), measure particle size distribution by particle size analysis (PSA), and determine surface area through Brunauer-Emmett-Teller (BET) analysis. The catalysts exhibited a surface area of 27.411 m²/g and reduced crystallite size, both contributing to enhanced catalytic activity. In the transesterification of Reutealis trisperma oil under optimal conditions (65 °C, 3 hours, methanol-to-oil ratio 9:1), the catalyst achieved 99.40% oil conversion and 88.82% biodiesel yield. A catalyst dosage of 7.5 wt% was optimal, while higher amounts caused emulsion and soap formation due to viscosity-related mass transfer limitations. This environmentally friendly synthesis route offers a reusable catalyst system for sustainable biodiesel production from non-edible feedstocks.
Co-Authors - Jumaeri Agung Tri Prasetya Ahmad Dzulfiqar Aisyah, Sabila Aldaffa, Raden Muhammad Syawal Alighiri, Dante Arfah Ratna Puri Gustian, Arfah Ratna Puri Arsenius Olfa Herlistyawan Athoriq, Naufal Atika Wijaya Auha, Nydia Ashfi Aurelia Anggit Widya Munika, Aurelia Anggit Widya Az-Zahra, Hanifah Azzahra, Elvara Siti Budi Astuti Cepi Kurniawan Dyah Setyaningrum, Dyah Edy Cahyono Eko Budi Susatyo Endang Susilaningsih Ervina Nur Hidayati, Ervina Nur Erwin Budi Pamungkas, Erwin Budi F Widhi Mahatmanti Gayuh Ganata Imam Sofyan, Gayuh Ganata Imam Harjono Himnil Khusna, Himnil Ian Yulianti, Ian Julianti, Belia Anggi Sri Kurniawati, Amallia Monica Avissa Mufatihah, Nishfa Nova Shintia Bokau, Nova Shintia Novilla Anggasari, Novilla Nugrahaningsih WH, Nugrahaningsih Nuni Widiarti Nuril Huda Permatasari, Bella Pramestia, Rena Aliya Prasetyo, Ridho Prayogo, Deffrian Putra, Ngurah Made Darma Riera Asti Wulaningrum, Riera Asti Rizkika, Aflah Agus Rizqi, Puji Rosanti, Yuan Maylia Sa’adah, Zumrotus Sri Kadarwati Sulistyani, Martin Suryat Hadi Kusuma, Suryat Hadi Teguh Budiyanto, Teguh Tri Handayani Triastuti Sulistyaningsih Utami, Kaswati Nur Wahyudita Meganingtyas Wahyuningsih, Ika Jati Widiya Aprilianti Winarni Pratjojo, Winarni Wisnu Sunarto Wiwit Prayitno, Wasi Sakti Woro Sumarni Zaky, Adrian Maulana Zumrotus Sa’adah