Stabilization of TiO2-based Photocatalytic Coating on Polymer Substrates with Complex Geometry Using Laser Annealing

18 October 2024, Version 2
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

TiO2-based photocatalytic coatings on substrates often require thermal annealing to achieve sufficient long-term stability and resistance to abrasion. This is difficult to achieve when using polymer substrates and/or other components in the system which are not stable enough for high temperature annealing. Herein, we present a method for annealing in those cases which relies on localized heating using a laser. This allows the coating the thermally anneal while at the same time protecting the substrate from higher temperatures. This method was then successfully adopted for more complex geometries, namely (half-)spherical substrates used for the so-called wireless light emitter technology.

Keywords

low temperature annealing
nitrobenzene reduction
methylene blue
wireless light emitters
internal illumination

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