Green Synthesis of Nanostructure CeO₂ Using Tea Extract: Characterization and Adsorption of Dye from Aqueous Phase

Table 2

The calculated d-spacing, crystalline size, and lattice parameter of synthesized CeO₂ after different heat treatments.

Calcination temperature (K)	d-spacing (nm)	Crystalline size (nm)	Lattice parameter (nm)
773	0.3123	8.8 ± 0.12	0.5408
873	0.3121	9.8 ± 0.14	0.5406
973	0.3121	10.1 ± 0.13	0.5405
1073	0.3121	11.4 ± 0.16	0.5406