Abstract
The radical species generated on hydroxyapatite (HAp) samples by UV irradiation were investigated and compared by electron spin resonance (ESR) with spin trapping reagent. It was recognized that ·OH and O 2 ·− species were produced on HAp after heat treatment at 200 °C (HAp200) by UV irradiation. It was assumed that ·OH radical was generated from H 2O on HAp200 by photo-induced excitation with UV irradiation as well as O 2 ·− from O 2 in air. These radicals were very active. On the other hand, few radical species were produced on HAp after heat treatment at 1150 °C by UV irradiation. The difference of generation of active radical species on HAp by UV irradiation must influence the activity for the photocatalytic decomposition of organic compounds.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
