Visible light-induced photocatalytic oxidation of phenol and aqueous ammonia in flowerlike bi2fe4o9 suspensions

Songmei Sun, Wenzhong Wang, Ling Zhang, Meng Shang

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

Photocatalytic active flowerlike Bi2Fe4O9 was synthesized by a hydrothermal method. Scanning (SEM) and transmission electron microscopy (TEM) images revealed that the photocatalysts are composed of wellcrystallized nanoplates along the (100) plane. The as-prepared nano-Bi2Fe4O9 exhibited excellent photocatalytic oxidation of phenol and aqueous ammonia under visible light irradiation. Much enhanced photocatalytic performance for phenol oxidation was observed with the assistance of a small amount of H2O2. For guiding the further improvement of its photocatalytic activity, the relationship between the electronic structure and the photocatalytic performance of Bi2Fe4O9 is revealed by ab initio calculations for the first time. The calculation results indicate Bi 2Fe4O9 is a multiband semiconductor, and the principle for an improved photocatalytic performance is to increase the efficiency of electron-hole separation considering the middle energy band that may act as electron-hole recombination centers.

Original languageEnglish
Pages (from-to)12826-12831
Number of pages6
JournalJournal of Physical Chemistry C
Volume113
Issue number29
DOIs
Publication statusPublished - Jul 23 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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