| 다공성 실리카 지지체 제조 및 Sol-Gel법에 의한 TiO2코팅 |
| 한요섭, 박재구 |
| 한양대학교 지구환경시스템공학과 |
| Preparation of Porous Silica Support and TiO2 Coating by Sol-Gel Method |
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| ABSTRACT |
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A sol-gel method was applied to coat TiO$_2$ on porous silica prepared using slurry foaming method from silica. from the results of XRD, SEM, and BET, the anatase phase was firstly observed at the coated supports with the heated of 50$0^{circ}C$. The coated supports with the heated of $700^{circ}C$ had the maximum anatase peak, and the particle size of coated TiO$_2$ was about 1 ${mu}{textrm}{m}$. Bending strength and gas permeability of the porous silica were measured for the feasibility as a catalytic supports. In case of the uncoated porous materials with the strength of 2.4 MPa, the strength increased to 3.9∼4.3 MPa after the coating process regardless of the heating temperature. On the other hand, the permeability of the uncoated porous materials decreased from 770${times}$10$^{-13}$ $m^2$ to 363${times}$10$^{-13}$ $m^2$ after the coating process, and it decreased with the increasing heating temperature. |
| Key words:
Porous silica, $TiO_2$ coating, Heating temperature, Pore structure, Strength, Permeability |
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