Photocatalyst having high photocatalytic activity in visible range and water treatment method using

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The present invention relates to a photocatalyst having high visible light activity by containing zinc oxide (ZnO) doped with rare earth metal, and a water treatment method using the same. The photocatalyst according to the present invention has a small band gap by containing zinc oxide (ZnO) doped with rare earth metal with an f orbital, thereby showing excellent optical activity in a visible light range, and having excellent photolysis activity with respect to organic compounds in water.(AA) Average size [nm](BB) Amount of doping rare earth metal [wt%]COPYRIGHT KIPO 2017