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All Journal Jurnal Periodic Jurusan Kimia UNP
Azzahra, Wenalda Hanifah
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Sintesis Tetraetil Ortosilikat (TEOS) dari Silika Hasil Kalsinasi Sekam Padi Rahmi, Rahmi; Nizar, Umar Kalmar; Khair, Miftahul; Althof, Hasnah Sausan; Azzahra, Wenalda Hanifah; Beri, Deski
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125501

Abstract

Indonesia is an agricultural country. Where agriculture makes an important contribution to the economy and the fulfillment of people's basic needs. It is known that every 1 kg of rice produced, is able to produce 0.28 kg of rice husk. Rice husk is an agricultural waste that is abundant in nature. In this research, the effect of calcination time on silica obtained from rice husk has been determined. The purity level of the extracted silica is 99%. Silica that has been successfully extracted is then used in the TEOS synthesis process by varying the reaction time. A total of 1 mole of ethanol (58.4 ml) and 0.25 ml (7 grams) of silica powder were added to 250 ml neck flask 3 and the addition of alumnia catalyst as much as 1 gram, then the mixture was refluxed using 800C for 5, 7, 10, 15 and 20 hours. The TEOS obtained was then subjected to several parameter tests that provide information about the physical and chemical conditions, so that this can provide information regarding the quality of the resulting solution. The measurements carried out are, Densiats solution testing, Viscosity and refractive index. From the data obtained the density value of TEOS is 0.986 g/ml - 0.995 g/ml, the viscosity value of TEOS is 0.8176 cps - 0.9337 cps and the refractive index value of TEOS is 1.356 - 1.360. While the yield obtained is from 82.11% - 54.74%.
Sintesis Silikon dari Silika (SiO2) Menggunakan Metode Reduksi Hidrotermal Azzahra, Wenalda Hanifah; Beri, Deski; Aini, Syamsi; Parbuntari, Hesty
Periodic Vol 13, No 3 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i3.125787

Abstract

Silicon is one of the materials whose utilization is getting bigger along with the times. Hydrothermal reduction method is one of the methods that can be done to synthesize silicon from natural materials because silicon does not exist freely in nature. The purpose of this research is to synthesize silicon using hydrothermal reduction method. The precursor used in the reduction process is silica (SiO2). The metal used as a reductant is magnesium metal and the molten salt that can be used is AlCl3. The reduction process is carried out by varying the reduction temperature to see the degree of crystallinity of silicon formed. Silicon formed is seen at the peak of  28.44, 47.30, 56.11, 69.13 dan 76.38.
Co-Authors Aini, Syamsi Althof, Hasnah Sausan Deski Beri Miftahul Khair Nizar, Umar Kalmar Parbuntari, Hesty Rahmi Rahmi