A facile coating method to construct uniform porous α-Fe2O3@TiO2 core-shell nanostructures with enhanced solar light photocatalytic activity

Haitao Fu, Shiyu Sun, Xiaohong Yang, Wufa Li, Xizhong An, Hao Zhang, Yu Dong, Xuchuan Jiang, Aibing Yu

Research output: Contribution to journalArticleResearchpeer-review

45 Citations (Scopus)

Abstract

A new synthetic approach has been developed to prepareα-Fe2O3@TiO2 core-shell nanostructures at ambient conditions (e.g., in water, ≤100 °C). This approach shows a few unique features, including: short reaction time (a few minutes) for forming core-shell nanostructures, no requirement of high temperature calcinations for generating TiO2 (e.g., at 80–100 °C), tunable TiO2 shell thickness, high yield and good reproducibility. The experimental results show that the α-Fe2O3@TiO2 core-shell nanostructures exhibit enhanced photocatalytic activity compared to the pure TiO2 and pure Fe2O3 in degradation of organic dye molecules with solar light irradiation. This could be attributed to the large surface area of TiO2 nanoparticles for maximum harvesting light adsorption, enhanced visible light absorption, and the effective charge separation at the heterojunction of α-Fe2O3 and TiO2. The findings may open a new strategy to synthesize TiO2-based photocatalysts with enhanced efficiency for environmental remediation applications.

Original languageEnglish
Pages (from-to)389-396
Number of pages8
JournalPowder Technology
Volume328
DOIs
Publication statusPublished - 1 Apr 2018

Keywords

  • Core-shell structure
  • Solar light photocatalyst
  • TiO
  • α-FeO

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