429649 Photoelectrocatalytic Degradation of Organics in Water Using TiO2 Nanotubes

Wednesday, November 11, 2015: 8:30 AM
255F (Salt Palace Convention Center)
Shawn Walker1, Julian Tamllos1, Krista Carlson2, Manoranjan Misra3 and Swomitra Mohanty1, (1)Chemical Engieering, University of Utah, Salt Lake City, UT, (2)Metallurical Engineering, University of Utah, Salt Lake City, UT, (3)Metallurgical Engieering, University of Utah, Salt Lake City, UT

The photoelectrocatalytic behavior of anodically formed titanium dioxide (TiO2) nanotubes annealed in various atmospheres was characterized. A point-of-use device containing these titanium nanotube arrays (TNA) has previously shown to disinfect water containing E-coli and this work further expands the application to organic contaminants in water.  Inactivation occurs in the presence of sunlight and an applied voltage bias.  The device is also capable of degrading organic chemicals such as phenol. Many industrial waste streams include phenol which is a common hazardous water contaminant.  Degradation of .25mM phenol is apparent after a 5 min residence time. Addition of 2 mM NaCl solution significantly increased the degradation as characterized by UV-Vis, HPLC, and GC-MS. Data showing adsorption of organic species, radical kinetics, and the oxidation reduction potential of the device will be presented.

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See more of this Session: Advanced Oxidation Processes I
See more of this Group/Topical: Environmental Division