Nanostructured Visible-Light Photocatalysts for Water Purification

Qi Li, Pinggui Wu, Jian Ku Shang

Research output: Chapter in Book/Report/Conference proceedingChapter


Titanium oxide (TiO,) photocatalysts have been widely studied for both solar energy conversion and environmental applications in the past several decades because of their high chemical stability, good photoactivity, relatively low cost, and nontoxicity. However, the photocatalytic capability of TiO, is limited to only ultraviolet light (wavelength, A,<400. nm), seriously limiting its solar efficiency. To overcome this limitation, both chemical and physical modification approaches were developed to extend the absorption band-edge of TiO, into visible-light region. These visible-light photocatalysts were further modified by nanoparticles of transition metal oxides and made into nanoparticles, nanoporous fibers, and nanoporous foams. The nanostructured photocatalysts showed very fast photocatalytic degradation rates in organics, bacteria, spores, and virus, and thus have great potential in water disinfection and removal of organic contaminants in water.

Original languageEnglish (US)
Title of host publicationNanotechnology Applications for Clean Water
Subtitle of host publicationSolutions for Improving Water Quality: Second Edition
PublisherElsevier Inc.
Number of pages21
ISBN (Print)9781455731169
StatePublished - May 6 2014


  • Metal-ion-modified nitrogen-doped titanium oxide photocatalysts
  • Nanostructured nitrogen-doped titanium-oxide-based photocatalysts
  • Nitrogen-doped titanium-oxide-based photocatalysts
  • TiO
  • Titanium oxide
  • Visible-light photocatalysis with titanium oxides

ASJC Scopus subject areas

  • General Engineering


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