Particle and Aerosol Research
Vol. 12, No. 3, September 2016, Pages 65-72
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Preparation of Nanoporous Silica Particles containing Various Pore Sizes from Silicic Acid by Spray Pyrolysis
Sun Kyung Kim1), Chongmin Lee1),2), Hankwon Chang1),2), and Hee Dong Jang1),2)
1)Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources
2)Department of Nanomaterials Science and Engineering, University of Science & Technology
*Corresponding author.
Tel.: +82-42-868-3612, E-mail: hdjang@kigam.re.kr
Received 24 March 2016, Revised 13 September 2016, Accepted 18 September 2016, Available online 06 October 2016
http://dx.doi.org/10.11629/jpaar.2016.9.30.065
Abstracts
Nanoporous SiO2 particles containing different pore volume and size were prepared from silicic acid by a spray pyrolysis. The pore size, pore volume and particle size could be controlled with varying the precursor concentration, reaction temperature, and amount of organic templates such as Urea and poly ethylene glycol (PEG). The pore size distribution, pore volume and specific surface area of as-prepared particles were analyzed by BET and BJH methods, and the average particle sizes were measured by a laser diffraction method. The nanoporous SiO2 particles ranged 0.6 - 0.9 ¥ìm in diameter were successfully synthesized and the average particle size increased as the silicic acid concentration increased. The morphology of nanoporous SiO2 particles was spherical and pores ranged 1 - 40 nm in diameter were measured in the particles. In case of Urea added into silicic acid, it showed no much difference in the morphology, pore size and pore volume at different Urea concentration. On the other hand, when PEG was added, it was clearly observed that pore diameter and pore volume of the particles surface increased with respect to PEG
concentration.
Keywords
spray pyrolysis, nanoporous SiO2 particles, silicic acid, Urea, PEG
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