한국환경과학회지 제28권 제11호 (p.971-981)

초음파 합성 적용 Cu2O-TiO2 (P-N 타입) 반도체 나노물질의 가시광 활성 평가

Evaluation of Visible-light activation of Cu2O-TiO2 (P-N type) Semiconductor Nanomaterials prepared by Ultrasonic-assisted Synthesis
키워드 :
Cu2O-TiO2,P-N type photocatalyst,Photocatalytic oxidation efficiency,Visible light

목차

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

초록

This study evaluated the photocatalytic oxidation efficiency of volatile organic compounds by Cu2O -TiO2 under visible-light irradiation. Cu2O-TiO2 was synthesized by an ultrasonic-assisted method. The XRD result indicated successful p-n type photocatalysts. However, no diffraction peaks belonging to TiO2 were observed for the Cu2O-TiO2. The Uv-vis spectra result revealed that the synthesized Cu2O-TiO2 can be activated under visible-light irradiation. The FE-TEM/EDS result showed the formation of synthesized nanocomposites in the commercial P25 TiO2, the undoped TiO2, and Cu2O-TiO2 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 those of P25 TiO2 and undoped TiO2. These results indicate that the prepared Cu2O-TiO2 photocatalyst can be applied effectively to control gaseous BTEX.