Table 2.

Calculated crystallite size of ZnO NPs are listed below.

ZnO samples	Crystallite size from XRD in nm
DEG 2 h	~ 22 nm
DEG 2 h with sodium acetate	~ 23 nm
DEG 3 h	~ 15 nm
DEG 3 h with sodium acetate	~ 18 nm
TEG 2 h	~ 20 nm
TEG 2 h with sodium acetate	~ 21 nm
TEG 3 h	~ 18 nm
TEG 3 h with sodium acetate	~ 18 nm

Where, D = crystallite size, λ = X-ray wavelength, β = FWHM of diffraction peak and θ = .

angle of diffraction.