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All Journal TESLA Jurnal Teknik Elektro UNTAR JURNAL SAINS PERTANIAN EQUATOR Pendidikan Ekonomi Business UHO: Jurnal Administrasi Bisnis Jurnal Penelitian Sains SOSIOHUMANIORA: Jurnal Ilmiah Ilmu Sosial dan Humaniora Jurnal Ilmu Dakwah Pena Justisia: Media Komunikasi dan Kajian Hukum Journal of Social Politics and Governance (JSPG) Jurnal Applied Science in Civil Engineering Khazanah Multidisiplin AL-BASHIRAH: Journal of Islamic Studies Convergence; Jurnal Oneline Jurnalistik Publikasi Riset Mahasiswa Manajemen Eastasouth Journal of Effective Community Services JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah JIPI (Jurnal Ilmiah Pendidikan Islam) JISEF : Journal Of International Sharia Economics And Financial Jurnal Pengabdian Sosial Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Material Research PESHUM
Jefri Jefri
Jurusan Teknik Elektro Universitas Tarumanagara
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Journal : Indonesian Journal of Material Research

 1 
Enhanced Selectivity of Ni/Al LDH for Cationic Dye Adsorption via Gambier Leaf Extract Modification Jefri, Jefri; Fithri, Najma Annuria; Ramadhan, Navinda
Indonesian Journal of Material Research Vol. 3 No. 1 (2025): March
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20253148

Abstract

The adsorption capability of Ni/Al LDH modified with gambier leaf extract was evaluated for the removal of Rhodamine B (RhB), Malachite Green (MG), and Methylene Blue (MB) dyes from aqueous solutions. UV-Vis spectroscopy analysis revealed that Ni/Al-Gambier Leaf Extract exhibited a higher efficiency in cationic dye removal compared to unmodified Ni/Al LDH. The removal percentages of RhB, MG, and MB using unmodified Ni/Al LDH were 6.00%, 40.05%, and 14.73%, respectively. However, after modification with Gambier Leaf Extract, these values significantly improved to 25.62%, 39.48%, and 31.06%, respectively. This enhancement was attributed to the polyphenolic functional groups present in the gambier leaf extract, which strengthened electrostatic interactions and promoted dye adsorption. These findings indicate that incorporating gambier leaf extract into Ni/Al LDH enhances its adsorption performance, making it a promising material for improving dye removal in wastewater treatment.
Efficient Desulfurization of 4-Methyldibenzothiophene Using H5PV2Mo10O40/TiO2: A Catalytic Approach Anggraini, Ana; Jefri, Jefri; Komis; Lesbani, Aldes
Indonesian Journal of Material Research Vol. 3 No. 1 (2025): March
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20253152

Abstract

Oxidation desulfurization (ODS) is an effective method to remove sulfur compounds from fuels by converting them into more polar oxidized forms that are easier to extract. In this study, H₅PV₂Mo₁₀O₄₀/TiO₂ catalysts were synthesized and characterized using FT-IR spectroscopy. The FT-IR spectra confirmed the successful impregnation of polyoxometalate into the TiO₂ matrix, indicated by the appearance of Ti-O and O-Ti-O vibrations, while the typical H₅PV₂Mo₁₀O₄₀ peaks remained detectable. The performance of the H₅PV₂Mo₁₀O₄₀/TiO₂ catalyst in the desulfurization of 4-methyldibenzothiophene (4-MDBT) was studied based on variations in reaction time, catalyst mass, temperature, and amount of H₂O₂. The optimal conditions obtained were a reaction time of 2 hours, a catalyst mass of 0.05 g, a temperature of 60°C, and a volume of H₂O₂ of 5 mL, with a maximum sulfur conversion of 99.0%. These results indicate that H₅PV₂Mo₁₀O₄₀/TiO₂ has potential as an efficient ODS catalyst.
Synthesis, Characterization, and Catalytic Performance of H₃[α-PMo₁₂O₄₀]·nH₂O-TiO₂ in Cyclohexane Oxidation Lingga, Fitra Wahyuni; Jefri, Jefri; Mohadi, Risfidian; Lesbani, Aldes
Indonesian Journal of Material Research Vol. 3 No. 1 (2025): March
Publisher : Magister Program of Material Science Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijmr.20253153

Abstract

This study aims to synthesize and characterize the H₃[α-PMo₁₂O₄₀].nH₂O-TiO₂ composite as a heterogeneous catalyst for cyclohexane oxidation using H₂O₂. FT-IR and XRD characterization showed the interaction between POM and TiO₂, with an increase in TiO₂ ratio leading to a decrease in POM crystallinity. Reaction optimization showed that the POM-1.00TiO₂ catalyst gave the highest conversion of 99.95% at 80°C, 2 hours reaction time, 3 mL H₂O₂ volume, and 0.1 g catalyst mass. GC analysis confirmed the formation of cyclohexanol and cyclohexanone, with the optimized conditions resulting in a balanced selectivity of 35.51% for cyclohexanol and 34.69% for cyclohexanone, demonstrating the catalyst's effectiveness in cyclohexane oxidation.
Co-Authors Abd.Rashid, Muhammad Hafiz Ahmad Rustan Aldes Lesbani Andries Kango Anggraini, Ana Ariesman M Assaidah, Assaidah Bao Giang, Pan Barlin Barlin Br. Ginting, Ega Amanda Budiman Budiman Dedi Rohendi Desi SPd Areva Dwi Zulfita Fatimah, Andi Besse H Adrianto H Hartono Hashfi Rafdi Hutabalian, Maslon Ichlas, Rudy Iskandar Jauchar B Kalsum, Ummy kambolong, makmur Kanchawongpaisan, Sipnarong Komis Kurnia P. Hutapea Lingga, Fitra Wahyuni Lohart, Thierry Charlson M.Aviv Adhitya Putra Pratama Manalu, Edwardo FH Marpaung, Linda Wahyu Mendan, Anugerah Milawati Br Ginting Muhammad Yusram Mulka, Sry Reski Musadat, Irfan mustafa, laode Najma Annuria Fithri, Najma Annuria Obaja Tarigan Putera, Asrip Ramadhan, Navinda Risfidian Mohadi Saragih, Rayani Siahaan, Yannuke Patricia Silalahi, M.Pd, Drs. Juniman Surachman Surachman Tesalonika Br Tarigan Wahyu Marpaung, Linda Widagdo, Herry Yulna Dewita S.Pd MM Hia Yusmar, Fajri Zola, Prima