Lestari, Yuniar Dwi (2022) Sintesis Silika Xerogel dari Sabut Kelapa. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Coconut coir is part of the coconut plant which is known to have a silica content of about 69% which can be used as a raw material for the manufacture of silica xerogel. Silica with the chemical formula SiO2 is widely used in industry and in everyday life. This study aims to determine the solvent concentration and the best aging time in the synthesis of silica xerogel from coconut fiber using the sol-gel method. Coconut husk is ashed in a furnace at a temperature of 600oC for 2 hours. Coconut coir ash was extracted using NaOH solvent with various concentrations of 1.5;2;2.5;3;3.5 N at 100 oC for 1 hour. The sodium silicate sol solution was acidified using 1N HCl to form a gel at pH 7. The gel formed was aged for a variation of time 12; 15; 18; 21; 24 hours. The result of the synthesis was white silica xerogel and characterized using FT-IR, XRD and SAA. The results of FTIR analysis showed that xerogel silica contains silanol and siloxane functional groups and XRD analysis showed that silica has an amorphous structure. The best conditions obtained for the synthesis of silica are at the aging time of 18 hours which produces the largest surface area of 414.046 cm-1, and at the concentration of 3.5N NaOH solvent with the largest yield of 90.39%.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Yuniar Dwi Lestari | ||||||||
| Date Deposited: | 12 Nov 2024 08:09 | ||||||||
| Last Modified: | 16 Nov 2024 04:23 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/31894 |
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