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

Jungang Hou, Zheng Wang, Shuqiang Jiao, Komin Shu

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1772-1779
Number of pages8
JournalJournal of Hazardous Materials
Volume192
Issue number3
DOIs
Publication statusPublished - 2011 Sep 15
Externally publishedYes

Keywords

  • Bismuth titanate
  • Heterostructure
  • Hydrothermal process
  • Photocatalyst
  • Visible light

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Fingerprint Dive into the research topics of '3D Bi<sub>12</sub>TiO<sub>20</sub>/TiO<sub>2</sub> hierarchical heterostructure: Synthesis and enhanced visible-light photocatalytic activities'. Together they form a unique fingerprint.

  • Cite this