| Functional group | IC | TiO2-UV | O3 | SN | TiO2-UV/O3 | TiO2-UV/SN | O3/SN |
| O-H | 3500 | - | 3388 | - | - | - | - |
| >N-H | 3304 | 3260 | 3202 | 3003 | 3328 | 3293 | 3371 |
| >C = O | 1660 | 1733 | 1730 | - | 1743 | 1733 | 1744 |
| C = C | 1613 | 1616 | 1616 | 1618 | 1615 | 1616 | 1616 |
| C-N | 1151 | 1180 | 1127 | 1177 | 1179 | 1184 | 1174 |
| S = O | 1030 | 1034 | 1031 | 1034 | 1032 | 1032 | 1033 |
| C-S | 732 | 749 | 721 | 738 | 721 | 722 | 722 |
| R-O | 1245 | 1291 | 1292 | 1161 | 1294 | 1299 | 1294 |
| 1079 | 1084 | 1094 | 1081 | 1182 | 1083 |