Cu가 도핑된 TiO2 광촉매의 산화환원 시스템에 대한 활성 평가

Abstract

The usefulness of photocatalytic TiO2 that is generalized and widely used in our lives being very greatly evaluated. Nevertheless, its low efficiency has been pointed out because TiO2 only reacts in the UV-A region. In order to solve this problem, this study tried to develop photocatalytic materials which can be using in many situations by doping relatively low energy gap. Cu doped TiO2 and TiO2 were used in this study. The photoactive evaluation and photocatalyst characteristic were studied to using developed photocatalyst. The characteristic of the photocatalyst was confirmed by TEM, XRD, EDS and UV-visible analysis, and photoactive was analyzed by the FT/IR using TCE. At UV-A region, absorbance of the TiO2 showed a rapid increase. but Absorbance of Cu/TiO2 showed rapid increase at visible region. In other words, while pure TiO2 showed a photoactive only in the UV-A region, Cu/TiO2 showed a photoactive to both UV region and visible region. Unlike pure TiO2, DCAC was not found on detected reaction product by Cu/TiO2 photocatalytic reaction. At Oxidation, Resolutions of TiO2 was higher than that of Cu/TiO2. but Resolutions of Cu/TiO2 was higher than that of TiO2 at Reduction. This is judged because of creation of electron and hole by ionized Cu.