Fig. 19From: Synthesis of lignin based composites of TiO2 for potential application as radical scavengers in sunscreen formulationFluorescence spectra of coumarin solution with KL/TiO2-0.5, KL/TiO2-1.0, KL/TiO2-1.5 and KL/TiO2-2.0 after being irradiated under sunlight for a 20 min, b 40 min, c 60 min, d 80 min, e 100 minBack to article page