Figure 2

(a) Changes in FTIR spectrum of carbonyl band and (b) absorbance spectra of ceria slurry with 0.1 wt.% of PMA (left) and PAA (right) during UV-irradiation for 120Â min. (c) XPS spectra of ceria slurry with 0.1 wt.% of PAA according to UV irradiation time; (top) 0Â min, (middle) 60Â min, and (bottom) 120Â min. (d) Changes in dissolved oxygen during UV irradiation on fabricated ceria slurry for 120Â min.