Sterilization system for air purifier by combining ultraviolet light emitting diodes with TiO2

Xiaohui Huang, Huaibing Wang, Song Yin, Xiaorong Chen, Wei Chen, Hui Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

BACKGROUND: Ultraviolet light emitting diodes (UV LEDs) were used as a light source in TiO2 photocatalysis because of their manyadvantages, such as, long life, safety, lowpollution, etc. In this experiment, a light source panelwas successfully fabricated with UV LEDs, the light intensities of which were relatively uniform. RESULTS:Thesterilizationprocesscomprisedtwosteps. First,anaerosolwasblockedbyhigh efficient particulateair(HEPA)filter paper coated with TiO2 photocatalyst. Second, Staphylococcus aureus in the aerosol decreased gradually in the photocatalysis process of UV LED/TiO 2. After 52 h irradiation all the S. aureus were killed. CONCLUSION: The UV LED light source panel had a larger surface for irradiation than a mercury lamp. Thus, its sterilization efficiency was much better than that of traditional methods. The feasibility of UV LED/TiO2 for photocatalysis was proved.

Original languageEnglish
Pages (from-to)1437-1440
Number of pages4
JournalJournal of Chemical Technology and Biotechnology
Volume84
Issue number10
DOIs
Publication statusPublished - Oct 2009

Keywords

  • Light emitting diode
  • Photocatalysis
  • Staphylococcus aureus
  • Sterilization
  • TiO
  • UV LED

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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