Table 1. Area Percentage of the Sub-Absorption Bands Related to Total Area (λn) in UV–Vis DR Spectra from Figure 3c, Total Fe Content Determined by XRF and wt % of Fe Present in Form of the Various Iron Species (Calculated from Total Iron Content × λn) for Four Fe-BEA35 Zeolites.

samples	Fe-1a		Fe-2b		Fe-3c		Fe-4d		Fe-5d		total Fe content
	λ1 (%)	(wt %)	λ2 (%)	(wt %)	λ3 (%)	(wt %)	λ4 (%)	(wt %)	λ5 (%)	(wt %)	(wt %)
0.52 Fe-BEA35	47	0.24	53	0.28	e						0.52
1.26 Fe-BEA35	58	0.73	42	0.53							1.26
1.61 Fe-BEA35	35.3	0.57	38.9	0.63	22.9	0.37	1.5	0.02	1.4	0.02	1.61
2.36 Fe-BEA35	27.2	0.64	27.4	0.65	28.9	0.68	11.6	0.27	4.9	0.12	2.36

^aIsolated Fe³⁺ ions in octahedral coordination.

^bIsolated Fe³⁺ ions in tetrahedral coordination.

^cFe³⁺ ions in small iron oxide clusters.

^dLarge iron oxide particles.

^eNot present.