Browse > Article

Synthesis of Tetramethylorthosilicate (TMOS) and Silica Nanopowder from the Waste Silicon Sludge  

Jang, Hee-Dong (Nano-Materials Group, Minerals & Materials Processing Division, Korea Institute Geoscience & Mineral Resources)
Chang, Han-Kwon (Nano-Materials Group, Minerals & Materials Processing Division, Korea Institute Geoscience & Mineral Resources)
Cho, Kuk (Nano-Materials Group, Minerals & Materials Processing Division, Korea Institute Geoscience & Mineral Resources)
Kil, Dae-Sup (Nano-Materials Group, Minerals & Materials Processing Division, Korea Institute Geoscience & Mineral Resources)
Publication Information
Resources Recycling / v.16, no.5, 2007 , pp. 41-45 More about this Journal
Abstract
Tetramethylorthosilicate (TMOS) and silica nanopowder were synthesized from the waste silicon sludge containing 15% weight of silicon powder. TMOS, a precursor of silica nanopowder, was firstly prepared from the waste silicon sludge by catalytic chemical reaction. The maximum recovery of the TMOS was 100% after 5 hrs regardless of reaction temperature above $130^{\circ}C$. But the initial reaction rate became faster while the reaction temperature was higher than $150^{\circ}C$. As the methanol feedrate Increased from 0.8 ml/min to 1.4 ml/min, the yield of reaction was not varied after 3 hrs. Then, silica nanopowder was synthesized from the synthesized TMOS by flame spray pyrolysis. The morphology of as-prepared silica nanopowder was spherical and non-aggregated. The average particle diameters ranged from 9 nm to 30 nm and were in proportional to the precursor feed rate, and precursor concentration.
Keywords
Synthesis; Silica nanopowder; Tetramethylorthosilicate; Silicon sludge;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Jang, H.D., 2001: Experimental study of synthesis of silica nanoparticles by a bench-scale diffusion flame reactor, Powder Technol., 119(2-3), pp. 102-108   DOI   ScienceOn
2 Madler, L., et al., 2002: Controlled synthesis of nanostructured particles by flame spray pyrolysis, J. Aerosol Sci., 33(2), pp. 369-389   DOI   ScienceOn
3 Dabadie, T., et al., 1995: Synthesis of inorganic gels in a lyotropic liquid crystal medium. I. Synthesis of silica gels in lamellar phases obtained from non-ionic surfactants, J. Sol-Gel. Sci. Technol., 4(2), pp 107-116   DOI
4 Berggren, A., Palmqvist, A., Holmberg, K., 2005: Surfactanttemplated mesostructnred materials from inorganic silica, Soft Matter, 1(3), pp. 219-226   DOI   ScienceOn
5 Herbert, G., 1994: Synthesis of monodispersed silica powders II. Controlled growth reaction and continuous production process, J. Eur. Ceram. Soc., 14(3), pp. 205-214   DOI   ScienceOn
6 Friedlander, S. K., 2000: Smoke, Dust, and Haze: Fundamentals of Aerosol Dynaruics, second ed., Oxford, New York
7 Jang, H.D., 1999: Synthesis of silica nanoparticles from tetraethylorthosilicate (TEOS) vapor in a bench-scale flame reactor, J. Aerosol Sci., 30(Suppl. 1), pp. s343-s344   DOI   ScienceOn
8 Preghenella, M., Pegoretti, A. and Migliaresi, C., 2005: Thermo-mechanical characterization of fumed silica-epoxy nanocomposites, Polym., 46(26), pp. 12065-12072   DOI   ScienceOn
9 Kawakami, N., et al., 2000: Preparation of highly porous silica aerogel thin film by supercritical drying, Jpn, J. appl. Phys. Part 2: Letters, 39(3), pp. L182-L184   DOI   ScienceOn