Enhanced photocatalytic performance of nanocrystalline TiO 2 membrane by both slow photons and stop-band reflection of photonic crystals

Sheng Li Chen, Ai Jun Wang, Chun Tian Hu, Chao Dai, Jay B. Benziger

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

An nc-TiO 2/SnO 2 inverse opal composite membrane was fabricated, the photo-activity of which was significantly enhanced by utilizing both slow photons and stop-band reflection of the photonic crystal layer. The materials of the photonic crystal layer must be transparent in the area of adsorption edge of the nc-TiO 2, so that SnO 2, having much greater electronic band gap than TiO 2, was used for the materials of the photonic crystal layer. The photonic band-gap of the SnO 2 photonic crystal was designed at the semiconductor band gap of TiO 2 to harvest slow photons in the interface between the SnO 2 layer and the TiO 2 layer. The two layer structure makes it possible to couple the stop-band reflectivity of the photonic layer to the photocatalyst. Composite membranes can improve solar energy harvesting and substantially improve photocatalysts for photolysis and photochemical degradation of environmental pollutants.

Original languageEnglish (US)
Pages (from-to)568-572
Number of pages5
JournalAIChE Journal
Volume58
Issue number2
DOIs
StatePublished - Feb 1 2012

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

Keywords

  • Inverse opal
  • Nanocrystalline TiO
  • Photo-catalyst
  • Photonic crystals
  • Slow photons
  • SnO
  • Stop-band reflection

Fingerprint Dive into the research topics of 'Enhanced photocatalytic performance of nanocrystalline TiO <sub>2</sub> membrane by both slow photons and stop-band reflection of photonic crystals'. Together they form a unique fingerprint.

  • Cite this