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ISSN : 1225-4517(Print)
ISSN : 2287-3503(Online)
Journal of Environmental Science International Vol.28 No.11 pp.971-981
DOI : https://doi.org/10.5322/JESI.2019.28.11.971

Evaluation of Visible-light activation of Cu2O-TiO2 (P-N type) Semiconductor Nanomaterials prepared by Ultrasonic-assisted Synthesis

Seung-ho Shin,Jeong-Hak Choi,Ji-hoon Kim,Joon Yeob Lee

Abstract

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.

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

신승호,최정학,김지훈,이준엽

초록

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