| 학회 |
한국화학공학회 |
| 학술대회 |
2004년 가을 (10/29 ~ 10/30, 호서대학교(아산캠퍼스)) |
| 권호 |
10권 2호, p.1484 |
| 발표분야 |
분체공학 |
| 제목 |
Formation of Spherical Crystalline Mesoporous TiO2 Particles by only Chemical Reaction without Calcination Process; Gel-Sol Method |
| 초록 |
A thermally stable mesoporous spherical TiO2 powders with a crystalline framework, high surface area, and large pores was synthesized by novel and simple alkoxide gel-sol method using titanyl acylate gel [Ti(OiPr)4-x(OAc)x] as a precorsor in 0.15N KOH solution. The experiment was performed directly at reaction temperature in the 15℃∼95℃ and atmospheric pressure without hydrothermal process and using the block copolymer. XRD analysis indicates that the anatase and rutile phase were formed pH range in 2∼12 and in below 2, respectively. The synthesized anatase phase was stable up to calcination temperature of 1000℃. The highest specific surface area (BET) was obtained about 232m2/g at the reaction temperature of 55℃. When the calcination temperatures increase, the adsorption-desorption isotherm plot according to the BDDT classification goes from a type IV isotherm to a type II isotherm. The hysteresis loop also exhibit a continuous evolution from type E corresponding to ink-bottle pores to type A cylinder-shapes pores for large particles diameter samples. |
| 저자 |
박한진1, 황운연1, 박형상1, 구기갑1, 김용렬2
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| 소속 |
1서강대, 2대진대 |
| 키워드 |
Sol-Gel process; Titanium Alkoxide; Acetic acid; Esterification reaction
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| E-Mail |
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| 원문파일 |
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