. Author manuscript; available in PMC: 2018 Feb 16.

Published in final edited form as: Catal Sci Technol. 2017 Feb 16;7(5):1129–1140. doi: 10.1039/C6CY02355J

Table 1.

Chemical states of Fe elements and there corresponding parameters used in this study.

Conditions	Sub level (photo electron core level)	Assignment	Peak position	FWHM	Area (%)	Fe^II/Fe^III ratio
MIL-53(Fe)-3 (220°C, 12h)	Fe 2p_3/2	Fe^II	709.3	2.70	47.8%	1.95
		Fe^III	711.5	2.70	33.9%
		Fe^II	714.2	2.70	18.2%
MIL-53(Fe)-1 (120°C, 12h)	Fe 2p_3/2	Fe^II	709.6	2.48	37.6%	1.07
		Fe^III	712.0	2.70	48.2%
		Fe^II	714.7	2.70	14.2%
MIL-53(Fe)-2 (170°C, 12h)	Fe 2p_3/2	Fe^II	709.4	2.10	39.8%	1.76
		Fe^III	711.3	2.18	36.1%
		Fe^II	713.9	2.70	24.1%
MIL-53(Fe)-4 (170°C, 24h)	Fe 2p_3/2	Fe^II	709.3	2.22	39.5%	1.53
		Fe^III	711.1	2.02	37.8%
		Fe^II	712.7	2.43	22.7%
MIL-53(Fe)-5 (170°C, 48h)	Fe 2p_3/2	Fe^II	709.5	2.58	35.3%	1.24
		Fe^III	711.4	1.78	44.7%
		Fe^II	712.5	3.10	20.0%