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| Abstract No.: |
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Scheduled at:
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Wednesday, June 07, 2017, Hall 14 11:50 AM
Medical Industry I
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| Title: |
Plasma sprayed titania as a photocatalyst for formaldehyde reduction
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| Authors: |
Rajan Bamola* / Surface Modification Systems Inc., USA
Fortunato Villamagna/ American Air Scrubbers, USA
Robert Gansert/ Advanced Materials and Technologies Services, Inc, USA
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| Abstract: |
Formaldehyde is widely used in hospitals as tissue preservatives and embalming fluids, in kidney dialysis machines and as sterilizing agents and disinfectants. It is also a byproduct of photochemical smog, engine exhaust and incinerator smoke. Long time exposure to Formaldehyde can lead to eczema dermatitis, eye damage and nasal cancer. Photocatalyst is an effective method to neutralize airborne hydrocarbon based toxins. Plasma spraying of titania leads to a photosensitive material suitable as catalyst beds utilized in air scrubbing units. Primarily, the advantage of plasma sprayed material is its durability and ease of cleaning over titania containing paints, and sol-gel thin films. This paper reports on the effects of microstructure and phase structure on the effectiveness of plasma sprayed titania on reduction of formaldehyde vapors. Actual scrubbers were inserted with sprayed catalyst beds and the time to reduce the formaldehyde to below 1 ppm was measured and compared to sol-gel applied titania coatings. Plasma sprayed titania was found to be better than the sol-gel applied films
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