Fig. 22

FTIR spectra of (a) ZnO (b) Co-doped ZnO (c) La-doped ZnO and (d) Ce-doped ZnO before and after the adsorption of CR dye.

FTIR spectra of (a) ZnO (b) Co-doped ZnO (c) La-doped ZnO and (d) Ce-doped ZnO before and after the adsorption of CR dye.