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ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
Journal of Nuclear Fuel Cycle and Waste Technology Vol.9 No.1 pp.1-11
DOI :

테트라에톡시실란 및 염산 농도에 따른 메조다공성 실리카 마이크로스피어의 모폴로지 변동에 관한 연구

Effect of Concentration of Tetraethoxysilane and Hydrochloric Acid on the Morphologies of Mesoporous Silica Microspheres

Sun Kyung Ji, Jong-Yun Kim, Suk Bon Yoon, Yong Suk Choi, Sung-Hee Jung, Kyuseok Song, Bum Jae Lee

Abstract

Tetraethoxysilane(TEOS) as a silica precursor and hydrochloric acid as an acid catalyst have been used in a surfactant-template synthesis of micrometer-sized mesoporous silica microspheres based on the macroemulsion technique. Increase in the concentration of tetraethoxysilane of the reaction mixture has a serious destructive effect on the particle shape and pore structure. As the acid concentration increases, relatively small microspheres are formed without destroying their spherical morphology of the particles as well as the pore structures. However, due to the attractive interaction between particles in an acidic condition, strong silica agglomerates are formed, and therefore are subject to a post-ultrasonic treatment to separate into an individual single particle.

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