3D Bi12TiO20/TiO2 hierarchical heterostructure: Synthesis and enhanced visible-light photocatalytic activities

Jungang Hou, Zheng Wang, Shuqiang Jiao, Hongmin Zhu

研究成果: Article査読

85 被引用数 (Scopus)

抄録

A three-dimensional (3D) multicomponent oxide, Bi12TiO20/TiO2 hierarchical heterostructure was successfully synthesized via a one-step and template-free hydrothermal route. X-ray diffraction and X-ray photoelectron spectroscopy measurements confirm that the composition of the as-fabricated sample is Bi12TiO20/TiO2 composite. Scanning and transmission electron microscopy observation reveals that the as-synthesized sample is microsized flower-like hierarchical networks consisted of Bi12TiO20 nanorods decorated with the primary TiO2 nanoparticles. Extension of the light absorption from the ultraviolet region to the visible-light region was confirmed by UV-vis absorption spectra. Due to the structure-property relationships, the 3D Bi12TiO20/TiO2 heterostructure exhibited enhanced visible photocatalytic activity over that of Bi12TiO20 and TiO2 samples in the decomposition of Rhodamine B in water which is a typical model pollutant. The enhanced photocatalytic activity can be attributed to the extended absorption in the visible light region resulting from the 3D Bi12TiO20/TiO2 heterostructures, and the effective separation of photogenerated carriers driven by the photoinduced potential difference generated at the Bi12TiO20/TiO2 junction interface, demonstrating that the Bi12TiO20/TiO2 heterostructure is a promising candidate as a visible light photocatalyst.

本文言語English
ページ(範囲)1772-1779
ページ数8
ジャーナルJournal of Hazardous Materials
192
3
DOI
出版ステータスPublished - 2011 9 15
外部発表はい

ASJC Scopus subject areas

  • 環境工学
  • 環境化学
  • 廃棄物管理と処理
  • 汚染
  • 健康、毒物学および変異誘発

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