Fig. 1. Diagram of TiO₂ nanoparticles adhered optical waveguide photocatalytic system

Fig. 2. UV-visible absorption spectra of quartz and COP-480R

Fig. 3. Hydrophilic angle of COP−480R before hydrophilic treatment and after hydrophilic treatment

Fig. 4. Absorption spectrum of PDMS

Fig. 5. Optical set-up for photocatalytic experiment

Fig. 6. Absorption spectra and color photo of Rh B aqueous solution before and after photocatalysis

Fig. 7. Absorption spectra and degradation rate of Rh B degraded by quartz waveguide and PDMS waveguide

Fig. 8. Absorption spectra and fluorescence photos of carbon ink and Rh B-carbon ink mixed solution

Fig. 9. Experimental phenomenon and absorption spectra of Rh B-carbon ink mixed solution before and after photocatalysis

Fig. 10. Absorption spectra and color of Rh B-carbon ink mixed solution after 10 h photocatalysis of TiO₂