| 초록 |
It is well known the porous anatase form, as compared to the rutile phase, is of greater important and interest due to its better catalytic properties. However, anatase crystalline phase of TiO2 is metastable and transformed into rutile at high temperatures. To overcome the disadvantage, in our previous work, the TiO2 particles with high surface area, stable crystal structure and controlled porosity, even high temperature, were synthesized by ionic liquid (IL)-assisted sol-gel method. But the method has crucial drawbacks such as highly consumption of expensive ionic liquid and extra process to remove ionic liquid with organic solvents. In this work, a small amount of IL was employed into the conventional sol-gel method using acetic acid as an additive material. By this approch, thermally stable porous TiO2 was successfully prepared with only 1% IL of previous work. The prepared TiO2 samples were characterized by XRD, N2 isotherm and TEM. |
