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Enhanced Photocatalytic Performances of CeO2/TiO2 Nanobelt Heterostructures

Authors

  • Jian Tian,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Yuanhua Sang,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Zhenhuan Zhao,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Weijia Zhou,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Dongzhou Wang,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Xueliang Kang,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Hong Liu,

    Corresponding author
    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
    2. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Science, Beijing, 100864, PR China
    • State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China.

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  • Jiyang Wang,

    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
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  • Shaowei Chen,

    Corresponding author
    1. State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China
    2. Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, California, 95064, USA
    • State Key Laboratory of Crystal materials, Center of Bio & Micro/nano Functional Materials, Shandong University, Jinan, 250100, PR China.

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  • Huaqiang Cai,

    1. Institute of Chemical Materials, China Academy of Physical engineering, Mianyang, 621900, PR China
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  • Hui Huang

    1. Institute of Chemical Materials, China Academy of Physical engineering, Mianyang, 621900, PR China
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Abstract

CeO2/TiO2 nanobelt heterostructures are synthesized via a cost-effective hydrothermal method. The as-prepared nanocomposites consist of CeO2 nanoparticles assembled on the rough surface of TiO2 nanobelts. In comparison with P25 TiO2 colloids, surface-coarsened TiO2 nanobelts, and CeO2 nanoparticles, the CeO2/TiO2 nanobelt heterostructures exhibit a markedly enhanced photocatalytic activity in the degradation of organic pollutants such as methyl orange (MO) under either UV or visible light irradiation. The enhanced photocatalytic performance is attributed to a novel capture–photodegradation–release mechanism. During the photocatalytic process, MO molecules are captured by CeO2 nanoparticles, degraded by photogenerated free radicals, and then released to the solution. With its high degradation efficiency, broad active light wavelength, and good stability, the CeO2/TiO2 nanobelt heterostructures represent a new effective photocatalyst that is low-cost, recyclable, and will have wide application in photodegradation of various organic pollutants. The new capture–photodegradation–release mechanism for improved photocatalysis properties is of importance in the rational design and synthesis of new photocatalysts.

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