Oxidation of PCE with a UV LED Photocatalytic Reactor

✍ Scribed by D. H. Chen; X. Ye; K. Li

• Book ID: 101826933
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 114 KB
• Volume: 28
• Category: Article
• ISSN: 0930-7516
• DOI: 10.1002/ceat.200407012

✦ Synopsis

This paper is the first to investigate photocatalysis using a cutting-edge and energy-efficient solid-state light source: Ultraviolet (UV) Light Emitting Diodes (LED's). UV LED's do not involve mercury vapor, can be driven with direct current (DC), and have a long lifetime of 100 000 hours. UV LED's with a peak wavelength of 375 nm were tested for perchloroethylene (PCE) photocatalytic oxidation over Degussa P±25 TiO 2 . At a UV light output of only 49 lW/cm 2 , the designed reactor delivers a PCE conversion of up to 43 %. If the UV LED price continues to drop, it is very likely that UV LED's will replace UV lamps as the favored light source in photocatalysis applications.