Green approach for the synthesis of ZnO nanoparticles using Cymbopogon citratus aqueous leaf extract: characterization and evaluation of their biological activities

Chemical and Biological Technologies in Agriculture

Table 1 FTIR spectra with potential assignments for both C. citratus ALE and ZnO NPs

Possible assignment	Absorption peaks in C. citratus ALE (cm⁻¹)	Absorption peaks in ZnO NPs (cm⁻¹)
-OH stretching vibrations	3409.55	3424.97
-C-H stretch in alkanes	2923.57	2923.57
N-H or C = O stretching vibrations	2356.60	2356.60
C = O carboxylic group	1616.06	1619.92
–CH aromatic ring	1400.07	1403.93
C-N stretching in amino acids	1076.09	1091.51
-C-H stretch (aromatics)	620.97	617.11
Zn–O	–	435.83