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| Abstract No.: |
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Scheduled at:
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Thursday, May 05, 2022, Hall G2 2:20 PM
Medical Industry
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| Title: |
Production of titanium dioxide with optimum heterojunctions and coating production via cold spray
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| Authors: |
Alexanna Hawkins* / University of Ottawa, Canada
Deliang Guo / University of Ottawa Cold Spray Lab, Canada
Bertrand Jodoin/ University of Ottawa Cold Spray Lab, Canada
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| Abstract: |
Titanium dioxide (TiO2) coatings possess high appeal due to self-cleaning properties that can accelerate the decomposition of bacteria and viruses. The study aim was to develop titania feedstock powder that maximizes anatase-rutile heterojunctions for enhanced photocatalytic activity under visible light and the development of cold spray process parameters for successful deposition of this powder into thin photocatalytic coatings. Pure titanium feedstock powder was used and subjected to chemical treatments to produce TiO2 nanostructures composed of anatase and rutile heterojunctions at the powder surface. Anatase and rutile heterojunctions were desired due to high activity, stability, and broadened bandwidth as opposed to each singular nanostructure. The resulting powder was characterized using both Raman spectra and x-ray diffraction to verify the presence of the desired heterojunctions. The photocatalytic properties were evaluated by monitoring the concentration of methylene blue over time which degrades when contact with the TiO2 powder. Results showed growth of desired heterojunctions and higher reactivity in the titanium dioxide
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