Enhanced Photocatalytic Activity of Bismuth Precursor by Rapid Phase and Surface Transformation Using Structure-Guided Combustion Waves

Kang Yeol Lee, Hayoung Hwang, Tae Ho Kim, Wonjoon Choi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The development of an efficient method for manipulating phase and surface transformations would facilitate the improvement of catalytic materials for use in a diverse range of applications. Herein, we present the first instance of a submicrosecond time frame direct phase and surface transformation of Bi(NO3)3 rods to nanoporous β-Bi2O3 rods via structure-guided combustion waves. Hybrid composites of the prepared Bi(NO3)3·H2O rods and organic fuel were fabricated by a facile preparation method. The anisotropic propagation of combustion waves along the interfacial boundaries of Bi(NO3)3·H2O rods induced direct phase transformation to β-Bi2O3 rods in the original structure due to the rapid pyrolysis, while the release of gas molecules enabled the formation of nanoporous structures on the surfaces of rods. The developed β-Bi2O3 rods showed improved photocatalytic activity for the photodegradation of rhodamine B in comparison with Bi(NO3)3·H2O rods and α-Bi2O3 rods due to the more suitable interdistance and the large contact areas of the porous surfaces. This new method of using structure-guided combustion waves for phase and surface transformation may contribute to the development of new catalysts as well as the precise manipulation of diverse micronanostructured materials.

Original languageEnglish
Pages (from-to)3366-3375
Number of pages10
JournalACS Applied Materials and Interfaces
Volume8
Issue number5
DOIs
Publication statusPublished - 2016 Feb 10

Keywords

  • bismuth oxide
  • combustion waves
  • nanoporous surfaces
  • phase transformation
  • photocatalytic activity
  • thermopower waves

ASJC Scopus subject areas

  • Materials Science(all)

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