Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 43, Issue 5, Pages 1534-1539Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es8025837
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Funding
- National Science Foundation [CTS-0120978]
- U.S. Department of Energy [DEFG02-91-ER45439]
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Removal of arsenic species from water by palladium-modified nitrogen-doped titanium oxide (TiON/PdO) nanoparticles was investigated with and without visible light For the first time,a high degree of As(III) removal undervisible light illumination was demonstrated on oxide photocatalysts. Over 2 orders of magnitude decrease of As(III) concentration in water was observed in 1 h as the As(Ill) concentration was reduced below the U.S. Environmental Protection Agency standard (10 mu g/L) by TiON/PdO photocatalyst. Such an efficient removal of As(Ill) was shown to result from the combined effects of strong adsorption and photooxidation by TiON/PdO, where an enhanced photocatalytic activity under risible light illumination than nitrogen-doped titanium oxide (TiON) was derived from the strong optoelectronic coupling between PdO and TON.
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