Physicochemical and structural properties of the materials modified with the Al/Fe-Al⁰ intercalating solutions: effect of previous particle-size refining of the starting material (C2-R vs. C2-N) and the intercalating method (EtOH, H₂O or NS).

Material	Al2O3a (% w/w)	Fe2O3a (% w/w)	Feinc.a (% w/w Fe2O3)	CEC (meq/100 g)	CC (%)	S BET (m2 g−1)	S μp (m2 g−1)	S ext (m2 g−1)
C2-N	16.52	6.86	—	108	—	36	10	26
C2-N-EtOH1.50	25.90	8.42	1.56	66	64	71	48	23
C2-N-NS1.50	26.39	8.02	1.16	71	34	85	73	12
C2-R	17.84	8.61	—	167	—	67	18	49
C2-R-EtOH1.50	25.15	10.08	1.47	59	65	105	79	26
C2-R-H2O1.50	25.96	9.86	1.25	62	63	115	86	29
C2-R-NS1.50	26.34	10.22	1.61	75	55	115	93	22
C2-R-NS2.58	26.41	10.18	1.57	115	31	181	117	64

^aDetermined by XRF analyses. Fe_inc.: incorporated iron; CEC: cation exchange capacity; CC: compensated CEC after pillaring; S_BET: specific superficial area; S_μp: micropore area; S_ext: external surface area.