4.5 Article

Hierarchical 3C-SiC nanowires as stable photocatalyst for organic dye degradation under visible light irradiation

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ELSEVIER
DOI: 10.1016/j.mseb.2013.09.016

Keywords

Photocatalytic property; Methylene blue solution; Decolorization; Hierarchical nanostructures; SiC nanowires

Funding

  1. National Nature Science Foundation of the People's Republic of China [50902124]
  2. Qianjiang Talents Project of the Science and Technology Office in Zhejiang Province [2013R10063]
  3. Visiting Scholar Foundation of State Key Lab of Silicon Materials [SKL2011-19]
  4. Zhejiang Sci-Tech University Graduate Student Innovation Project [YCX12014]

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3C-SiC nanowires with hierarchical structure were synthesized by sol-gel carbothermal reduction method. The photocatalytic property of SiC nanowires was investigated. 3C-SiC hierarchical nanowires exhibited an enhanced photocatalytic activity by accelerating the photocatalytic degradation of methylene blue solution under visible light irradiation. Methylene blue was degraded efficiently after 5 h irradiation over the photocatalyst. The photocatalytic activity was affected by the initial concentration of the methylene blue solution. Silicon dioxide layer was observed on the surface of nanowires after the catalytic process. The positive effect of SiO2 surface oxygen vacancies and 3C-SiC hierarchical nanostructures on the high decolorization efficiency of SiC nanowires was discussed. The detailed photocatalytic redox processes were also explained. (C) 2013 Elsevier B.V. All rights reserved.

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