Table 2 IR bands of algal biomass and the naturally sourced nano-pigments.
Peak (cm−1) | Algal biomass | Zinc ferrite/AB | Cerium ferrite/AB |
|---|---|---|---|
3200 | OH stretching | – | – |
2928 | Methylene C–H stretching | – | – |
1660 | Alkenyl C=C stretching | – | – |
1605 | Conjugated C=C | – | – |
1440 | Methyl C–H asymmetric | Methyl C–H asymmetric | Methyl C–H asymmetric |
1071 | C–OH stretching | C–OH stretching | C–OH stretching |
920 | P–O–C stretching | P–O–C stretching | P–O–C stretching |
670 | C=S stretching | C=S stretching | C=S stretching |
580 | C–S stretching | – | – |
582 | Tetrahedral Fe–O Stretching (Very weak) | Tetrahedral Fe–O stretching (strong) | Tetrahedral Fe–O stretching (strong) |
