Solar light photocatalysis using Bi2O3/Bi 2SiO5 nanoheterostructures formed in mesoporous SiO 2 microspheres

Ling Zhang, Wenzhong Wang, Songmei Sun, Dong Jiang, Erping Gao

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

There have been significant efforts to find novel photocatalytic materials with improved properties, such as an extended absorption wavelength from the UV to the visible-light region. Among the semiconductors with high photocatalytic activities, considerable attention has been given to bismuth-based oxides with suitable band gaps, which provide an opportunity to harvest visible light. Herein, we report Bi2O3/Bi2SiO5 nanoheterostructures formed in mesoporous SiO2 microspheres. The as-prepared nanocomposite exhibited excellent photocatalytic activities for the decomposition of both bisphenol A and acetaldehyde under irradiation by simulated solar light. The enhanced photocatalytic activity is due to (i) the reduction in the electron-hole recombination rate because of the reduced dimensions of the photocatalyst, (ii) a more efficient utilization of the photogenerated electrons and holes as a result of the high surface area to bulk ratio of the mesoporous structure, and (iii) a better electron-hole pair separation due to the formation of the Bi2O3/Bi 2SiO5 nanoheterostructure. The high efficiency in the degradation of organic pollutants under mild conditions makes the as-prepared mesoporous photocatalyst a promising candidate for photocatalytic environmental purification.

Original languageEnglish
Pages (from-to)10043-10048
Number of pages6
JournalCrystEngComm
Volume15
Issue number46
DOIs
Publication statusPublished - Dec 14 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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