Preparation of High Activity Ga and Cu Doped ZnS by Hydrothermal Method for Hydrogen Production under Visible Light Irradiation

Table 3

Comparison of chemical composition from XRF and XPS.

Characterization method	Sample	Zn	Cu	Ga	S
XRF	Ga(0.1),Cu(0.01)-ZnS	36.49	0.69	3.37	20.27
XPS	Ga(0.1),Cu(0.01)-ZnS	37.30	7.90	46.59	8.21