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All Journal Indonesian Journal of Material Research
Syafa Aliyah, Amanda
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering

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Comprehensive Physicochemical Characterization of Gambier Leaf Extract-Modified Layered Double Hydroxide Jefri, Jefri; Erviana, Desti; Syafa Aliyah, Amanda
Indonesian Journal of Material Research Vol. 4 No. 2 (2026): 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.20264291

Abstract

Layered double hydroxide (LDH) is a promising material; however, its application is still limited by agglomeration and suboptimal physicochemical properties. In this study, Ni–Al LDH was modified with Uncaria gambir leaf extract via coprecipitation to improve its properties. Characterization using FT-IR, XRD, BET, SEM/TEM, XPS, and UV–DRS showed that the layered structure of LDH was retained after modification, while significant changes in surface chemistry resulted from the introduction of phenolic groups. Interaction between the extract and LDH occurs primarily at the surface via hydrogen bonding and π–π interactions. Optical analysis revealed a decrease in the bandgap energy from 2.32 eV to 1.32 eV, indicating increased visible-light absorption. Textural properties revealed a decrease in surface area due to pore closure and increased agglomeration. Nevertheless, the presence of active groups from the extract enhances the material’s reactivity and interaction potential. These results demonstrate that gambier extract effectively modifies the physicochemical properties of LDH, providing a strategy for developing sustainable biomass-based hybrid materials.
Co-Authors Erviana, Desti Jefri Jefri