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An excellent visible light responsive C,N-codoped Titania hollow spheres were prepared by a simple wet method. Hydrazine was used as nitrogen resource. Firstly, Titania hollow spheres were prepared using carbon spheres as template. Afterwards, the hollow spheres were dipped into hydrazine hydrate, and then calcined at low temperature (120°C) in the air. Thus, C,N-codoped Titania hollow spheres was...
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