Synthesis of NaX zeolite from Blitar kaolin via hydrothermal and sonication methods with alkali fusion pre-treatment

Khalifah, Susi Nurul, Fiddaroini, Saidun, Arifah, Aminatus, Hasanah, Awwali Maf’ulah and Prasetyo, Anton ORCID: https://orcid.org/0000-0003-1575-8634 (2025) Synthesis of NaX zeolite from Blitar kaolin via hydrothermal and sonication methods with alkali fusion pre-treatment. Jurnal Kimia Sains dan Aplikasi, 28 (5). pp. 274-282. ISSN 1410-8917

Text 25034.pdf - Published Version Available under License Creative Commons Attribution Share Alike. Download (551kB)

Abstract

NaX zeolite, widely recognized for its applications in cation exchange, adsorption, and catalysis, was successfully synthesized from Blitar natural kaolin using an alkali fusion pre-treatment, followed by two comparative synthesis methods: hydrothermal and sonication. The synthesis was conducted at 70°C for 2 and 4 hours. Optimal conditions were achieved with a NaOH/kaolin weight ratio of 2.0 and a synthesis gel composition of 10SiO2: 1Al2O3: 6Na2O: 180H2O (molar ratio). X-ray diffraction (XRD) confirmed the transformation of natural kaolin into sodium silicate, with sonication yielding phase-pure NaX zeolite, while the hydrothermal method resulted in NaX with sodalite impurities. Fourier-transform infrared (FTIR) spectroscopy identified characteristic NaX vibrations, and scanning electron microscopy (SEM) revealed cubic-shaped particles in the sonication method. The sonication process accelerated crystallization, producing higher-purity zeolite in shorter times than hydrothermal synthesis. These findings emphasize the effectiveness of sonication in enhancing the crystallinity and purity of NaX zeolite, offering a robust, time-efficient alternative for large-scale zeolite production.

Item Type:	Journal Article
Keywords:	zeolite NaX; kaolin, hydrothermal; sonication; alkali fusion
Subjects:	03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030206 Solid State Chemistry 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030299 Inorganic Chemistry not elsewhere classified 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry
Divisions:	Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User:	susi nurul khalifah
Date Deposited:	21 Dec 2025 22:11

Downloads

Origin of downloads

Actions (login required)

View Item