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Aldes Lesbani
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Pusat Riset Material Anorganik dan Senyawa Kompleks, Prodi Magister Ilmu Material Universitas Sriwijaya, Jl. Padang Selasa No 524 Bukit Besar Palembang Sumatera Selatan, 30139.
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INDONESIA
Indonesian Journal of Material Research
Published by Universitas Sriwijaya
ISSN : 29871654     EISSN : 29871654     DOI : https://doi.org/10.26554/ijmr.xxx
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering
The scope of IJMR encompasses a diverse array of research areas, including but not limited to Nanomaterials and nanotechnology Biomaterials and biocompatibility Polymers, composites, and hybrid materials, Electronic, optical, and magnetic material Advanced ceramics and glasses, Metals and alloys Functional materials and smart materials, Surface engineering and coatings, Materials characterization, testing, and simulation Materials for energy storage, conversion, and harvesting, Environmental and sustainable materials Advanced manufacturing processes and materials engineering
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 44 Documents
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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.
Optimization of Hydrothermal Carbonization Time of Dimocarpus longan Peel: Adsorption Selectivity and Regeneration Performance for Dyes Wijaya, Alfan; Ahmad, Nur; Utami, Hasja Paluta
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.20253150

Abstract

This study investigates the hydrothermal carbonization (HTC) process of Dimocarpus longan peel for the development of a selective and regenerable adsorbent for cationic dye removal. The hydrochar was synthesized at 190°C with varying carbonization durations (4–12 hours) and characterized using XRD and FTIR analysis. XRD analysis revealed the formation of an amorphous carbon phase, particularly at longer HTC durations, with the most optimized structure observed at 10 hours. FTIR spectra confirmed that hydrothermal carbonization preserved the primary functional groups while modifying their intensity. Adsorption experiments using a binary dye system (malachite green-MG and rhodamine B-RhB) demonstrated that the hydrochar exhibited higher selectivity for MG, achieving a removal efficiency of 81.78%, compared to 41.88% for RhB. Desorption studies indicated that ethanol and acetone were the most effective desorbing agents, with desorption efficiencies of 18.99% and 18.14%, respectively, while water and acidic conditions showed minimal dye release. Regeneration tests revealed a gradual decline in adsorption capacity over three cycles, with removal efficiencies decreasing from 73.23% to 42.17%, indicating partial loss of adsorption sites and possible structural degradation. These findings suggest that Dimocarpus longan peel-derived hydrochar, particularly at 10-hour HTC processing, is a promising adsorbent for selective cationic dye removal. However, further optimization of regeneration techniques is necessary to improve its reusability and long-term performance.
Selectivity of Ni/Al LDH Material Supported by Green Tea Leaf (Camellia sinensis) Extract as an Adsorbent for Removing Cationic Dyes in Wastewater Treatment Amri, Amri; Wibiyan, Sahrul; Fitri, Erni Salasia
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.20253151

Abstract

Water pollution due to synthetic dye waste is a serious environmental problem, so an effective method is needed to overcome it, including using adsorption. In this study, Ni/Al-Cs materials were synthesized and characterized to evaluate their selectivity towards Rhodamine B (RhB), Malachite Green (MG), and Methylene Blue (MB) dyes. Adsorption selectivity tests were conducted using UV-Vis spectroscopy to determine changes in dye concentration before and after interaction with the material. Results showed that Ni/Al-Cs had the highest adsorption capacity towards MG, followed by MB and RhB. With its selective adsorption properties, Ni/Al-Cs material has the potential to be used as an effective adsorbent in the treatment of dye effluents in aquatic environments, especially MG dye.
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.
Advances in Biosynthesis of Nanoparticles: A Review Ismail, Rusul K.; Al Hussan, Shahlaa M. Abd; Jasim, Saif Khalel
Indonesian Journal of Material Research Vol. 3 No. 2 (2025): July
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.20253249

Abstract

This paper provides a detailed review of nanoparticle biosynthesis, highlighting biological synthesis methods in comparison to physical and chemical approach. It addresses the shortcomings of existing techniques and explores potential advancements in this field. And, the applications of the nanoparticles prepared in a biological in the medical field, as well as studying its advantages and disadvantages, were highlighted. The paper review also provides a brief overview of nanoparticle applications, linking them to both the desired and achieved sizes through various synthesis methods.
A Review on Azo Dyes Removal from Wastewater Using Biochar-Based Adsorbents: Materials, Mechanisms, and Perspectives Navinda Ramadhan; Amanda Syafa Aliyah; Rabellia Juladika Sayeri; Neza Rahayu Palapa
Indonesian Journal of Material Research Vol. 3 No. 2 (2025): July
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.20253258

Abstract

Azo dyes are synthetic organic pollutants widely used in the textile, food, leather, and cosmetic industries. Effluents containing these dyes are often discharged into the aquatic environment without adequate treatment, causing serious pollution that is toxic, carcinogenic, and resistant to biological degradation. Among various effluent treatment methods, adsorption stands out as an efficient, simple, and economical technique. Biochar a porous solid resulting from biomass pyrolysis has been of great interest as a potential adsorbent due to its superior physical-chemical properties and abundant raw material availability. This article reviews recent developments in the utilization of biochar, both natural and modified, for adsorption of azo dyes from wastewater. It discusses the mechanism of interaction between biochar and dye, operational factors that affect efficiency, and various biochar modification strategies such as chemical activation, metal addition, composite formation, and the use of nano-biochar. Data from various literatures show that the adsorption capacity of biochar towards Rhodamine B and Congo Red can reach more than 1000 mg/g, especially after advanced modifications. Nonetheless, technical and economic challenges in the widespread application of biochar still need to be overcome. This article provides an in-depth insight into the potential and future direction of biochar development as a sustainable solution in the treatment of wastewater polluted with azo dyes.
Study the Effect of DBD Plasma on the Mechanical Properties of Polymer PMMA/HA Jasim; Salma S. Abdullah; Saif Khalel Jasim; Ayat Hussein Ghazi
Indonesian Journal of Material Research Vol. 3 No. 2 (2025): July
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.20253259

Abstract

Recent studies on plasma generated at atmospheric pressure have become increasingly significant, with researchers intensifying their focus on its practical applications, particularly in industrial and medical fields. DBD plasma has been utilized in this study to examine the mechanical properties of compound materials (PMM/HA) synthesized in the laboratory. The compressive strength results indicate a gradual increase in stress and Young’s modulus with increasing time before and after the plasma treatment, also hardness levels were found to have improved, before and after the plasma treatment (63.3, 71.3, 73, and 74.3) respectively. Either the bending test result increased post-impact, with a notable enhancement corresponding to extended time periods. DBD plasma had a much bigger effect on bending strength. The polymer and hydroxyapatite showed a rise from 63.31 MPa before impact to 74.4 MPa after 90 seconds. This shows that the samples’ mechanical properties get better with longer plasma exposure. Method A base material made of PMMA polymer was added to with a nanomaterial made of hydroxyapatite (HA) to make a bioceramics compound. We conducted hardness, bending, and tensile tests to investigate the influence of DBDon the mechanical properties of nanocomposite materials. Nanosized materials (PMMA/HA) showed a big improvement in their properties after plasma treatment for three different lengths of time (30, 60, and 90 seconds). This shows that the samples’ mechanical properties get better with longer plasma exposure.
Confinement and IR Induced Optical Nonlinearity and Enhanced Second-Order Susceptibility in Nano-Sized Crystals Miah, Mohammad Idrish
Indonesian Journal of Material Research Vol. 3 No. 2 (2025): July
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.20253257

Abstract

Cadmium iodide bulk- and nano-crystals are grown and doping defect and quantum-confinement effects in IR-induced optical susceptibility in the nanocrystals are investigated. Bulk-sized and intrinsic crystals are also investigated as of reference. The nanomaterials with various crystal sizes are pumped with an IR laser beam. This pump-probe experiment probes the doubledfrequency IR-induced second harmonic optical beam. The expression for the second harmonic intensity is obtained from the electric polarization of the nanomaterial process subjected to high intensity illumination. The second–order susceptibility is calculated from the experimentally measured data. The results show that a significant enhancement in the optical susceptibility is achieved in nanomaterials with moderately doping. The maximum second–order optical susceptibility is found to 0.65 pm/V. However, bulk and intrinsic crystals show no considerable second harmonic effect. A nonlinear transmittance measurement for the determination of the second-order contribution in absorption supports the effect.
Eucheuma Cottonii Hydrochar: A Promising Adsorbent for Congo Red Dye Putri, Bunga Indah; Arsyad, Fitri Suryani; Hanifah, Yulizah; Ahmad, Nur
Indonesian Journal of Material Research Vol. 3 No. 2 (2025): July
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.20253264

Abstract

This study investigates the transformation of Eucheuma cottonii (EC) into a highly efficient adsorbent through hydrothermal carbonization at 200°C, resulting in hydrochar (HC-200). The FT-IR analysis reveals significant structural changes, including reduced intensity of oxygenated functional groups such as carbonyl and hydroxyl, alongside increased aromaticity, contributing to enhanced hydrophobicity and structural stability. These alterations render HC-200 well-suited for adsorption applications. BET analysis highlights a marked increase in the specific surface area and mesoporosity of HC-200 compared to EC, with hysteresis loops confirming enhanced adsorption capacity. SEM imaging shows substantial morphological changes, including rougher surfaces, increased porosity, and the presence of spheroidal structures, indicative of successful carbonization and improved diffusivity. Adsorption studies underline HC-200's superior performance in anionic dye removal, with a maximum adsorption capacity 37.894 mg/g. pHpzc analysis demonstrates more acidic surface characteristics, which favor adsorption in acidic conditions. Adsorption kinetics align predominantly with the pseudo-second-order model, indicating chemisorption as the dominant mechanism. The regeneration study shows HC-200's excellent reusability, maintaining significant adsorption efficiency over seven cycles, whereas EC experiences a steep decline in performance.

Page 4 of 5 | Total Record : 44

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