Table 3.
UV/Vis absorption bands for the PtNPs synthesized using various biological entities.
| Plant | Peak Appeared (nm) | Peak Disappeared (nm) | Reference |
|---|---|---|---|
| Azadirachta indica | 241 * | - | [61] |
| Nigella sativa | 263 | - | [62] |
| Terminalia chebula | - | 262 ** | [63] |
| Ocimum sanctum (Tulsi) | 400 | - | [66] |
| Doipyros kaki (Persimmon) | 477 | - | [68] |
| Anacardium occidentale (Cashew) | 200 | 259 ** | [69] |
| Bacopa monnieri (Water hyssop) | 330–380 | - | [70] |
|
Eichhornia crassipes (Water hyacinth) |
200–300 (continuum) | 261 ** | [79] |
| Green tea powder extract | - | 320 *** | [73] |
| Ononis spinosa | 200–300 (broad continuum) | 265 | [74] |
| Maytenus royleanus | 282 | - | [75] |
| Mentha piperita | 272 | - | [76] |
| Taraxacum laevigatum | 283 | - | [77] |
| Prunus x yedoensis | 277 | - | [78] |
| Quail egg yolk | 329 | - | [80] |
| Padina gymnospora | - | 320 | [81] |
| Streptomyces species | 262 | - | [83] |
| Sheep milk | 278–284 | - | [84] |
* Indicate the formation of the reduced PtNPs. ** Corresponding to Pt(IV) ions. *** Corresponding to the bio-reducer within the green tea.