In the current study, a Cu2O/TiO2 photoinduced nanocomposite materials prepared by ultrasonification method was evaluated the photocatalytic oxidation efficiency of volatile organic compounds (BTEX) under visible-light irradiation. The results of XRD confirmed the successful preparation of photoinduced nanocomposite materials. However, diffraction peaks belonging to TiO2 were not confirmed for the Cu2O/TiO2. The possible reason for the absence of Cu2O peak is their low content and small particle size. The result of uv-vis spectra exhibited that the fabricated Cu2O/TiO2 can be activated under visible light irradiation. The FE-SEM/EDS and TEM showed the formation of synthesized nanocomposites and componential analysis in the undoped TiO2 and Cu2O/TiO2. The photocatalytic oxidation efficiencies of benzene, toluene, ethylbenzene, and o-xylene with Cu2O/TiO2 were higher than undoped TiO2. According to light sources, the average oxidation efficiencies for BTEX by Cu2OT-0.5 were exhibited in the orer of 8 W day light > violet LEDs > white LEDs. However, the photocatalytic oxidation efficiencies normalized to supplied electric power were calculated to be in the following order of violet LEDs > white LEDs > 8 W day light, indicating that the LEDs could be a much more energy efficient light source for the photo-oxidation of gaseous BTEX using Cu2O/TiO2.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 소재 합성
    2.2. 소재 특성 분석
    2.3. 광반응 나노소재 활성 시험
3. 결과 및 고찰
    3.1. 광반응 나노소재 특성 평가
    3.2. 광반응 나노소재 활성도 평가
4. 결 론
REFERENCES

• 최정학(부산가톨릭대학교 환경공학과) | Jeong-Hak Choi (Department of Environmental Engineering, Catholic University of Pusan, Busan 46252, Korea)
• 이준엽((주)시드파트원) | Joon Yeob Lee (SEEDPARTONE Inc., Seoul 07599, Korea) Corresponding author