Synthesis and Characterization of Ag₂S Layers Formed on Polypropylene

Table 2

XPS results derived from the curve fitted deconvoluted spectra.

Immersions time, min	Element	Atomic percentage, %	Binding energy, eV	NIST data	Oxidation state	Attribution; to structural element found in	Relative percentage, %
				368.1		Ag2S
	Ag 3d5/2	33.33	368.5	368.4	+1	Ag2O	100
				368.3		Ag2SO4
40			160.8	160.7	−2	Ag2S	62.90
	S 2p3/2	22.23	163.0	163.1	0	–S–S–	23.65
			168.8	168.6	+6	S(VI)–O	13.45
			531.0	530.9		Ag−O	18.55
	O 1s	44.44	532.1	532.0	−2	Ag2SO4	46.52
			533.3	533.3		O2 (adsorbed)	34.93
				368.1		Ag2S
	Ag 3d5/2	50.70	368.2	368.4	+1	Ag2O	100
				368.3		Ag2SO4
120			161.0	160.7	−2	Ag2S	69.98
	S 2p3/2	24.67	163.3	163.1	0	–S–S–	16.65
			168.4	168.6	+6	S(VI)–O	13.37
			531.2	530.9		Ag−O	16.77
	O 1s	24.63	532.0	532.0	−2	Ag2SO4	65.60
			533.4	533.3	−2	O2 (adsorbed)	17.63
				368.1		Ag2S
	Ag 3d5/2	40.68	368.0	368.4	+1	Ag2O	100
				368.3		Ag2SO4
200			160.8	160.7	−2	Ag2S	60.50
	S 2p3/2	22.18	163.0	163.1	0	–S–S–	23.16
			168.8	168.6	+6	S(VI)–O	16.34
			530.8	530.9		Ag−O	16.08
	O 1s	37.17	531.9	532.0	−2	Ag2SO4	68.93
			533.3	533.3		O2 (adsorbed)	14.99