다공성 실리카 지지체 제조 및 Sol-Gel 법에 의한 TiO2 코팅 = Preparation of Porous Silica Support and TiO2 Coating by Sol-Gel Method

다국어 초록 (Multilingual Abstract)

A sol-gel method was applied to coat TiO2 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 500oC. The coated supports with the heated of 700oC had the maximum anatase peak, and the particle size of coated TiO2 was about 1 mm. 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 2.4MPa, the strength increased to 3.9~4.3MPa after the coating process regardless of the heating temperature.
On the other hand, the permeability of the uncoated porous materials decreased from 770 ´ 10-13 m2 to 363 ´ 10-13 m2 after the coating process, and it decreased with the increasing heating temperature.
Key words : Porous silica, TiO2 coating, Heating temperature, Pore structure, Strength, Permeability