US EPA

193506 

Journal Article 

As(III) removal by palladium-modified nitrogen-doped titanium oxide nanoparticle photocatalyst 

Li, Q; Easter, NJ; Shang, JK 

2009 

1 

Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851 

43 

5 

1534-1539 

English 

19350931 

10.1021/es8025837 

WOS:000263758600051 

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 under visible 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(III) concentration was reduced below the U.S. Environmental Protection Agency standard (10 ?g/L) by TiON/PdO photocatalyst. Such an efficient removal of As(III) was shown to result from the combined effects of strong adsorption and photooxidation by TiON/PdO, where an enhanced photocatalytic activity under visible light illumination than nitrogen-doped titanium oxide (TiON) was derived from the strong optoelectronic coupling between PdO and TiON.