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KMID : 1024520190280110971
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Journal of the Environmental Sciences
2019 Volume.28 No. 11 p.971 ~ p.981
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Evaluation of Visible-light activation of Cu2O-TiO2 (P-N type) Semiconductor Nanomaterials prepared by Ultrasonic-assisted Synthesis
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Shin Seung-Ho
Choi Jeong-Hak
Kim Ji-Hoon
Lee Joon-Yeob
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Abstract
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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.
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KEYWORD
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Cu2O-TiO2, P-N type photocatalyst, Photocatalytic oxidation efficiency, Visible light
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