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All Journal JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR)
Lumban Raja, Saur
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Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology

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Improving Porosity of Glycerol-plated Silica from Rice Husk Silica Lumban Raja, Saur
Journal of Chemical Natural Resources Vol. 1 No. 2 (2019): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (960.836 KB) | DOI: 10.32734/jcnar.v1i2.1257

Abstract

Research on the increasing pore size of rice husk silica with the addition of glycerol as a template has been done. Sodium silicate obtained from rice husk can be extracted with sodium hydroxide. The resulting sodium silicate is then added to the glycerol and followed by precipitation using hydrochloric acid to obtain silica. The obtained results were calcined at 600°C. The resulting material analised by FT-IR, XRD and BET. The FT-IR data shows an asymmetric Si-O-Si absorption peak at wave number 1067 cm-1 and a symmetrical Si-O-Si peak absorption at 806.77 cm-1 wave number. Diffractogram XRD also shows a widening peak in the area of 22.820 that the silica is amorphous. The result of adsorption of nitrogen desorption of silica isotherm indicated Type IV isotherm adsorption which was characteristic of mesoporous material and obtained the size distribution of 9.2 nm and the pore volume was 0.002850 cc / g and the surface area of silica was 80.38 m2/g
Fabrication of Synthetic Zeolite from Sinabung Mountain Volcanic Ash via Sol-Gel Method Lumban Raja, Saur; Simatupang, Eka Bonita
Journal of Chemical Natural Resources Vol. 4 No. 2 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v4i2.11968

Abstract

Fabrication of synthetic zeolite from Sinabung Mountain volcanic ash by Sol-Gel method. The zeolite is obtained by extraction of alkalis sodium silicate and sodium aluminate. At first volcanic ash was characterized using XRF and XRD analyses. The XRF analysis shows that silica is 44.8%. In contrast, XRD analysis showed a sharp peak at a 2Ѳ corner area of 27.55o to express bonded with silica mineral salt. At the same time, the silica characterization is done by FT-IR analysis. The FT-IR analysis shows the presence of Si-O-Si groups at wave numbers 1064.71 cm-1, 786.96 cm-1 and Si-OH at wave 3749.62 cm-1 and 3448.72 cm-1, identifying the presence of silica. The synthetic zeolite characterization analysis obtained is FT-IR, XRD, SEM-EDX, and BET analysis. In the FT-IR analysis, the O-Si-O group was obtained at wave 987,85 cm-1 and O-Al-O at wave 447,89-585,30 cm-1, identifying X zeolite. Diffractogram XRD showed a sharp peak at 66.8°, 28.12°, and 45.84°, forming mixed crystalline X and zeolite A. SEM-EDX analysis shows that zeolite morphology is tight and homogeneous and has a high aluminium content of 24.79 and Si 16.12. While for nitrogen desorption, adsorption analysis on pore size, surface area and pore volume are 3,22 nm, 61,86 m2/g and 0,095 cc/g. The result of synthetic zeolite isotherm adsorption-desorption shows type V showing mesoporous size.
Co-Authors Simatupang, Eka Bonita