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All Journal Science and Technology Indonesia Indonesian Journal of Material Research
Nur Ahmad
Research Center of Inorganic Materials and Coordination Complexes, Universitas Sriwijaya, Palembang, 30139, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Synthesis of Zn/Al-ZnO Composite Using Zn/Al-Layered Double Hydroxide for Oxidative Desulfurization of 4-Methyldibenzothiophene Risfidian Mohadi; Nur Ahmad; Sahrul Wibiyan; Zaqiya Artha Zahara; Erni Salasia Fitri; Mardiyanto; Idha Royani; Aldes Lesbani
Science and Technology Indonesia Vol. 8 No. 4 (2023): 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.2023.8.4.701-709

Abstract

Zn/Al-ZnO composites made from Zn/Al-Layered Double Hydroxide base material and ZnO as a precursor were successfully made in this study. Characterization analysis using SEM-EDS, XRD, and FTIR. The SEM analysis results show the Zn/Al-LDH has a smooth surface, overlapping, and is prone to aggregation, resulting in non-uniform particle size. However, it forms a uniform grain shape. Zn/Al-ZnO have rough surfaces with uniform particle shape and size, and the presence of pores on the particle surface. EDS analysis shows the Zn element which is more abundant in Zn/Al-ZnO. XRD analysis of Zn/Al-LDH showed the hydrotalcite. XRD analysis on ZnO showed the hexagonal wurtzite crystal structure. Zn/Al-ZnO composites at an angle of 2θ show the same peak of the base material and the precursor. FTIR analysis of the composite revealed the presence of O-H groups at wave numbers 3445 cm−1, 1633 cm−1, and 1504 cm−1, indicating the presence of nitrate. Additionally, vibrations at wave numbers 1382 cm−1 corresponded to antisymmetric (v3) stretching of nitrate, while wave numbers 418 cm−1 and 606 cm−1 indicated metal-oxygen stretching vibrations. Of all the factors used in the desulfurization of 4-methyldibenzothiophene, Zn/Al-ZnO composites had the highest %conversion rate of both the base material and the precursor. The %conversion values of Zn/Al-ZnO at the time of contact were 99.40%, catalyst dosage 99.38%, solvent 99.10%, and temperature 99.56%, respectively. The catalyst is heterogeneous and reusable for the desulfurization of 4-methyldibenzothiophene.
Comparative Assessment of Procion Red Removal Using Magnetite-Based Composites with Humic Acid, Activated Charcoal, and Lignin Nur Ahmad; Alfan Wijaya; Amri
Indonesian Journal of Material Research Vol. 3 No. 3 (2025): November
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.20253368

Abstract

This investigation presents the synthesis and comparative assessment of three magnetite-based composite adsorbents, including Magnetite Humic Acid (MA), Magnetite Activated Charcoal (MB), and Magnetite Lignin (MC), aimed to remove Procion Red (PR) from aqueous solutions. The characterization of the materials was conducted through XRD, BET, and FTIR analyses, which validated the successful synthesis of magnetite and its interactions with the respective organic components. The point of zero charge (pHpzc) values obtained were 4.75, 5.09, and 4.10 for MA, MB, and MC, respectively. Adsorption experiments were performed under these pHpzc conditions to mitigate electrostatic influences. Kinetic investigations demonstrated that the adsorption process adhered to a pseudo-second-order model, signifying that chemisorption was the prevailing mechanism. Furthermore, the Langmuir isotherm yielded the most accurate representation of the equilibrium data, implying the occurrence of monolayer adsorption. MB demonstrated the highest adsorption capacity of PR, recorded at 52.632 mg/g at a temperature of 50oC. This observation underscores the benefits associated with its elevated surface area and the effective dispersion of Fe3O4 particles within the activated carbon matrix. The comparative analysis elucidates the impact of organic matrix selection on surface characteristics, interaction dynamics, and the overall efficacy of adsorption processes. This study presents novel findings regarding the development of natural carbon-magnetite composites aimed at enhancing the efficiency of dye removal processes.
Co-Authors Aldes Lesbani Alfan Wijaya Amri Erni Salasia Fitri Idha Royani Mardiyanto Risfidian Mohadi Sahrul Wibiyan Zaqiya Artha Zahara