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Advanced Materials

Highly Photoactive, Low Bandgap TiO2 Nanoparticles Wrapped by Graphene

Authors

  • Joon Seok Lee,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Kyeong Hwan You,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Chan Beum Park

    Corresponding author
    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea
    • Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701, Republic of Korea.

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Abstract

Highly photoactive, graphene-wrapped anatase TiO2 nanoparticles are synthesized through one-step hydrothermal reduction of graphene oxide (GO) and TiO2 crystallization from GO-wrapped amorphous TiO2 NPs. Graphene-TiO2 nanoparticles exhibit a red-shift of the band-edge and a significant reduction of the bandgap (2.80 eV). Graphene-TiO2 nanoparticles possess excellent photocatalytic properties under visible light for the degradation of methylene blue.

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