0717041056, PASCOLI HANES (2012) PEMBUATAN NANOKOMPOSIT TITANIA-SILIKA DARI BAHAN TITANIUM TRIKLORIDA (TiCl3) DAN SILIKA SEKAM PADI DENGAN METODE SOL-GEL. Digital Library.
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Abstract
Abstrak Telah dilakukan sintesis dan karakterisasi nanotitania (TiO2) dan nanokomposit titania-silika (TiO2-SiO2) dengan metode sol-gel antara campuran titanium triklorida (TiCl3) dan silika sekam padi. Desain mikrostruktur dilakukan dengan variasi waktu proses sol-gel pada sekitar 3, 5, 7, 9, 11, dan 13 jam. Karakterisasi dilakukan dengan difraksi sinar-X (XRD), scanning electron microscopy (SEM), dan metode empat titik. Struktur titania yang diperoleh adalah anatase yang masih didominasi fasa amorf dan struktur komposit titania-silika berfasa amorf sebagaimana sampel hanya dikalsinasi pada temperatur 550oC. Mikrostruktur nanotitania dan nanokomposit tiania-silika semakin homogen seiring dengan lamanya proses. Hal ini serupa pada nilai resistivitas nanokomposit titania-silika. Nilai resistivitas berkurang dengan meningkatnya proses waktu sol-gel. Dalam proses sol-gel, efek dari dinamika Brown dapat memperoleh diameter butiran nanokomposit titania-silika berkisar 60-100 nm sebagaimana dipastikan dari hasil SEM. Hasil EDS menunjukkan perbandingan persentase massa pada titania dan silika dalam komposit adalah 31,68 dan 68,32%. Kata Kunci: nanokomposit titania-silika, sekam padi, sol-gel, mikrostruktur, resistivitas. Abstract Synthesis and characterization nanotitania and nanocomposite titania-silica (TiO2- SiO2) was carried out with sol-gel method from mixture of titanium trichloride and silica from rice husk. Microstructural design was conducted by the various of the sol-gel process at about 3, 5, 7, 9 11, and 13 hours. The characterization was done by X-ray diffraction (XRD), scanning electron microscopy (SEM), and four points method. The structure of titania obtained was anatase which was still dominated by amorphous phase. The structure of titania-silica composite was amorphous phase as a sample was only calcined at 500oC. Microstructural nanotitania and nanocomposite are more homogeneous along with long process. This is similiar to the trend of resistivity titania-silica nanocomposite.The resistivity decreased with increased of the time sol-gel process. In sol-gel method, the effect of Brownian dynamics can gain the grains diameter of titania-silica composite ranged about 60-100 nm as confirmed by SEM. The EDS shows the ratio of weight percent for titania and silica in the composite is 31.68 and 68.32%. Key Word: nanocomposite titania-silica, rice husk, sol-gel, microstructure, resistivity.
| Item Type: | Article |
|---|---|
| Subjects: | ?? General ?? |
| Divisions: | ?? Fisiska ?? |
| Depositing User: | IC-STAR . 2015 |
| Date Deposited: | 20 Nov 2015 02:12 |
| Last Modified: | 20 Nov 2015 02:12 |
| URI: | http://digilib.unila.ac.id/id/eprint/14586 |
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