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Evanescent waves modulate energy efficiency of photocatalysis within TiO~2~ coated optical fibers illuminated using LEDs by Song, Yinghao (author);Ling, Li (author);Westerhoff, Paul (author);Shang, Chii (author) is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract Coupling photocatalyst-coated optical fibers (P-OFs) with LEDs shows potential in environmental applications. Here we report a strategy to maximize P-OF light usage and quantify interactions between two forms of light energy (refracted light and evanescent waves) and surface-coated photocatalysts. Different TiO~2~-coated quartz optical fibers (TiO~2~-QOFs) are synthesized and characterized. An energy balance model is then developed by correlating different nano-size TiO~2~ coating structures with light propagation modes in TiO~2~-QOFs. By reducing TiO~2~ patchiness on optical fibers to 0.034 cm^2^/cm^2^ and increasing the average interspace distance between fiber surfaces and TiO~2~ coating layers to 114.3 nm, refraction is largely reduced when light is launched into TiO~2~-QOFs, and 91% of light propagated on the fiber surface is evanescent waves. 24% of the generated evanescent waves are not absorbed by nano-TiO~2~ and returned to optical fibers, thus increasing the quantum yield during degradation of a refractory pollutant (carbamazepine) in water by 32%. Our model also predicts that extending the TiO~2~-QOF length could fully use the returned light to double the car

Who reads Evanescent waves modulate energy efficiency of photocatalysis within TiO~2~ coated optical fibers illuminated using LEDs?

Author

Song, Yinghao (author);Ling, Li (author);Westerhoff, Paul (author);Shang, Chii (author)

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)