Abstract
TiP2O7 particle was prepared by the following three methods: 1) precipitation method, 2) impregnation method, and 3) ion exchange method. TiP2O7 were with XRD clearly identified with XRD when the calcination temperature was 700 ∼ 900°C. The crystalline diameter of TiP2O7 of the samples calculated by the Sherrer's equation was found to be 10 - 65 nm. However, no peak was found in the XRD of the sample calcinated at 600°C by the impregnation method. BET specific surface area and specific pore volume of the samples were 10 ∼ 65 m2 / g and 0.03 ∼ 0.31 ml/g, respectively. The BET surface area of the TiP2O7 prepared by the impregnation method was greater than by other two methods. These results indicate the TiP2O7 particle prepared by impregnation method had more porous structure.
The UV-VIS absorbance spectrum analysis of all samples was examined. All samples absorbed light in wavelength below 340nm. Especially, the two samples calcinatied at 600°C and 700°C prepared by the impregnation method, absorbed light in wavelength below 400 nm. These results suggested that non-crystalline (amorphous) TiP2O7 could absorb light in longer wavelength. Furthermore, we found that these two samples could photocatalytically decompose 2-propanol in water with good activity.
