| Issue |
EPJ Web Conf.
Volume 377, 2026
15th International Physics Seminar (IPS 2026)
|
|
|---|---|---|
| Article Number | 01006 | |
| Number of page(s) | 6 | |
| Section | Material Physics | |
| DOI | https://doi.org/10.1051/epjconf/202637701006 | |
| Published online | 02 July 2026 | |
https://doi.org/10.1051/epjconf/202637701006
Effect Aging Time on Structure and Surface Area of Zeolite Synthetic from Low Grade Bauxite and Rice Husk Ash
1 Department of Chemistry, Faculty of Science and Mathematics, Universitas Negeri Jakarta, Rawamangun, East Jakarta, 13220 Indonesia
2 Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Jalan Pluit Utara no 2, Jakarta Utara, 14440, Indonesia
3 Department of Chemistry, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong BE1410, Brunei Darussalam
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 2 July 2026
Abstract
This study examines the effect of aging time on the structural evolution and surface properties of Zeolite NaX synthesized from low-grade bauxite and rice husk ash, sustainable alumina and silica sources, respectively. Synthesis was performed through alkali fusion, aging, and hydrothermal crystallization. Aging duration was varied to evaluate its influence on phase formation, crystallinity, morphology, and specific surface area. Fourier Transform Infrared (FTIR) spectra showed progressive changes in the Si–O–Al and Si–O vibrations, indicating evolution of the aluminosilicate framework during aging. X-ray diffraction (XRD) analysis revealed that prolonged aging promoted stabilization of precursor phases prior to hydrothermal treatment. However, excessive aging reduced the conversion efficiency toward the Faujasite (FAU) framework, resulting in lower crystallinity of Zeolite NaX. Brunauer–Emmett–Teller (BET) analysis demonstrated a significant decrease in specific surface area with increasing aging time, indicating limited pore development and suppressed zeolitization, with highest surface area is 90.589 m2/g. Scanning electron microscopy (SEM) confirmed morphological evolution associated with extended aging. The results demonstrate that aging time critically controls precursor stability, crystallization behavior, and surface characteristics of Zeolite NaX synthesized from low-grade bauxite and rice husk ash.
© The Authors, published by EDP Sciences, 2026
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