As(III) removal by palladium-modified nitrogen-doped titanium oxide nanoparticle photocatalyst.
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 waterwas observed in 1 h as the As(III) concentration was reduced below the U.S. Environmental Protection Agency standard (10 microg/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 undervisible light illumination than nitrogen-doped titanium oxide (TiON) was derived from the strong optoelectronic coupling between PdO and TiON.
Li
Qi
Q
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Easter
Nickolas Joseph
NJ
Shang
Jian Ku
JK
D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D002384:Catalysis; D018360:Crystallography, X-Ray; D004058:Diffusion; D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009584:Nitrogen / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D055668:Photochemical Processes; D013057:Spectrum Analysis; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*
C009495:titanium dioxide; D010165:Palladium; C048320:palladium oxide; D014025:Titanium; D001151:Arsenic; D009584:Nitrogen