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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/33691

Title: Tungsten Doped Tantalum Oxide Anodes for Electrochemical Disinfection of Wastewater
Authors: Holladay, Siobhan
Advisor: Thorpe, Steven J.
Kirk, Donald W.
Department: Materials Science and Engineering
Keywords: Electrochemical disinfection
Doped metal oxide
Issue Date: 29-Nov-2012
Abstract: Tungsten doped tantalum oxide films on titanium substrates were investigated for use as anodes in the electrochemical disinfection of wastewater (measured through e. coli inactivation). A sol-gel method for fabricating these films was developed that allowed for control of both the doping concentration (through volumes of tantalum and tungsten ethoxide added to the solutions), and the thickness (through the number of layers applied). The morphology and composition of these films were investigated using SEM and EDX mapping; the morphology was found to be connected to the fabrication heating procedure. Three different doping concentrations (0%, 8% and 14% tungsten by volume of added metals) were investigated for: 1) electrochemical activity; 2) long-term stability; and 3) disinfection capabilities. The 14% samples demonstrated the highest conductivity (0.06μS/cm), good long-term stability (verified using ICPMS, SEM and EDX analysis) and the best electrochemical activity for removal of e. coli (based on wastewater tests).
URI: http://hdl.handle.net/1807/33691
Appears in Collections:Master

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