Meanwhile after-calcined sample started from CuCl2 has a noticeable peak at 525 and 584 cm-1
which are attributable to Cu O stretching modes. All of samples have the absorption peaks in range of
1380-1640 cm-1 thatmay be assigned to O H bending vibrations combined with copper atoms[11]. Thus,
FTIR result suggeststhat the formation of copper oxide compound is obtained after annealing process in
this method accompanying the presence of Cu O bonds corresponding to Cu O stretching modes.