SINTESIS DAN KARAKTERISASI SILIKA GEL DARI ABU VULKANIK GUNUNG AGUNG MELALUI TEKNIK SOL-GEL

  • N. P. S. N. Utari Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana
  • I W. Sudiarta Program Studi Kimia FMIPA Universitas Udayana, Jimbaran, Bali, Indonesia
  • P. Suarya Program Studi Kimia FMIPA Universitas Udayana, Jimbaran, Bali, Indonesia

Abstract

Mount Agung in Karangasem, Bali which erupted in September 2017 produced abundant volcanic ash. This ash can be used as a raw material for making silica gel. The stages of the research carried out included analysis of the content of silicon (Si), synthesis of silica gel using sol-gel technique, characterization using FTIR, X-RD instruments as well as surface acidity. The results of the analysis using the X-RD instrument showed the presence of silicon from SiO2 found at 2? = 28,07530. The silica gel yield obtained in this study was 15.05% w/w. The results of the characterization with the FTIR instrument showed that silica gel from volcanic ash of Mount Agung had the main Si-OH and Si-O-Si groups. The hydroxyl bond from Si-OH grup were found at ±3649.32 cm-1 for stretching vibrations and ±1687,71 cm-1 for bending vibrations. Si-O bond from Si-O-Si group were found at ±1207.44 cm-1 for asymmetric stretching vibrations and ±482.20 cm-1 for bending vibrations. Diffractogram showed that the silica gel had an amorphous structure with surface acidity of 18.0222 mmol/g and a surface area of 36.5514 m2/g. 


Keywords: Agung mountain, silica gel, sol-gel, vulcano ash

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Published
2020-02-01
How to Cite
UTARI, N. P. S. N.; SUDIARTA, I W.; SUARYA, P.. SINTESIS DAN KARAKTERISASI SILIKA GEL DARI ABU VULKANIK GUNUNG AGUNG MELALUI TEKNIK SOL-GEL. Jurnal Kimia (Journal of Chemistry), [S.l.], p. 30-36, feb. 2020. ISSN 2599-2740. Available at: <https://ojs.unud.ac.id/index.php/jchem/article/view/57160>. Date accessed: 21 nov. 2024. doi: https://doi.org/10.24843/JCHEM.2020.v14.i01.p06.
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Articles