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Facile Synthesis of Self-Sensitized TiO2 Photocatalysts and Their Higher Photocatalytic Activity

Authors

  • He Zuoli,

    1. Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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  • Que Wenxiu,

    Corresponding author
    1. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    • Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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  • Xie Haixia,

    1. Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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  • Chen Jing,

    1. Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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  • Yuan Yuan,

    1. Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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  • Sun Peng

    1. Electronic Materials Research Laboratory, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Author to whom correspondence should be addressed. e-mail: wxque@mail.xjtu.edu.cn

Abstract

“Self-sensitized” TiO2 photocatalysts sensitized by TiO2 nanocrystals with quantum structures were successfully prepared via a solvothermal process and a facile subsequent treatment process. We calculated an optimized structure by using a pseudopotential Hartree–Fock method and investigated the structure using X-ray diffraction, scanning, and transmission electron microscopy, and UV–Vis spectrophotometer. The self-sensitized products exhibit an extremely high photocatalytic activity due to their unique optical properties. To discuss the optical properties of the 3-D nanoparticles sensitized by the TiO2 nanocrystals, we proposed a model of the electron band structure of the as-prepared products to give a reasonable explanation for such a high photocatalytic activity.

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