Yasvinawati, Niarisandi (2015) Karakterisasi Nanosilika Hasil Biosintesis dari Abu Ampas Tebu (Baggase) oleh Lactobacillus bulgaricus. Sarjana thesis, Universitas Brawijaya.
Abstract
Abu ampas tebu berpotensi menjadi salah satu sumber daya alam yang dapat digunakan sebagai bahan baku pembuatan nanomaterial silika. Produksi nanomaterial silika menggunakan metode biosintesis lebih ramah lingkungan dibandingkan metode kimia dan fisika. Tujuan penelitian ini adalah untuk mengetahui potensi Lactobacillus bulgaricus dalam mensintesis nanomaterial, pengaruh waktu inkubasi selama biosintesis, dan mengetahui hasil dari metode pengeringan antara freeze drying dan kering angin terhadap kualitas nanosilika dari abu ampas tebu. Penelitian terdiri dari dua tahap yaitu proses biosintesis melalui inkubasi dengan Lactobacillus bulgaricus dan karakterisasi nanomaterial. Proses inkubasi dilakukan pada tempat gelap dengan suhu 37°C selama 24 jam, 48 jam, dan 72 jam. Karakterisasi nanosilika dilakukan menggunakan Fourier Transformer Infrared Spectroscopy (FTIR) dan X-ray Diffraction (XRD). Hasil yang diperoleh menunjukkan bahwa nanomaterial organik hasil perlakuan pengeringan menggunakan freeze drying dan kering angin tidak menunjukkan perbedaan pada gugus fungsi yang dihasilkan yakni Si-OH, Si-O-Si, dan Si-O. Nanosilika berbentuk sperikal (bulat), ukuran material terkecil 30,5 nm pada inkubasi 72 jam, dan berwarna putih. Puncak lebar (2θ) hasil XRD sampel freeze drying sebesar 21,35o dan kering angin sebesar 21,37o, keduanya berkarakter amorphous SiO2. Waktu inkubasi dan perlakuan freeze dry tidak berpengaruh pada hasil karakterisasi gugus fungsi dan karakter amorf SiO2 pada pengamatan FTIR dan XRD.
English Abstract
Baggase ash has the one potential of natural resources that can be used as raw materials for making silica nanomaterial. The biosynthetic production method of natural nanomaterial is better than either chemical or physical methods. The research is aimed to determine the potential of Lactobacillus bulgaricus in nanomaterial synthesis, effect the lenght of incubation time during biosynthesis, and drying methods between freeze dry and dry cleaning on the quality nanosilica from bagasse ash. The study consisted of two steps of the process of biosynthesis by incubation with Lactobacillus bulgaricus and characterization of nanomaterial. Incubation process conducted in dark place at a temperature of 37°C for 24, 48, and 72 h. Particles and chemical characterization of the nanomaterial were done by Fourier Transformer Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD). It was formed that organic silica nanomaterial resulted from both drying methods possess similar functional group of Si-OH, Si-O-Si and Si-O. Additionally the nanomaterial is attributed by spherical shape (round) with the smallest size of 30.5 nm at incubation time of 72 h, and white colour. Wide peak (2θ) the result of XRD for freeze dying sample at 21,35o and dry cleaning sample at 21,37o, both have amorphous SiO2 character. Incubation time and freeze dry treatment had no effect on the results of amorphous characterization and functional groups on the SiO2 by FTIR and XRD observations.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FMIPA/2015/55/051501525 |
| Subjects: | 500 Natural sciences and mathematics > 510 Mathematics |
| Divisions: | Fakultas Matematika dan Ilmu Pengetahuan Alam > Matematika |
| Depositing User: | Samsul Arifin |
| Date Deposited: | 23 Feb 2015 14:38 |
| Last Modified: | 20 Oct 2021 05:07 |
| URI: | http://repository.ub.ac.id/id/eprint/127321 |
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