Table 1.

Mesoporous structures of the α-Fe₂O₃ synthesized at different temperatures for 12.0 h (FeCl₃/H₃BO₃/NaOH = 2:3:4)

α-Fe2O3 nanoarchitecture	Temperature	Multipoint BET	Total pore volume	Average pore diameter
	(°C)	(m2 g−1)	(cm3 g−1)	(nm)
1	120	21.3	3.9 × 10−2	7.3
2	150	5.2	2.9 × 10−2	22.1
3	180	2.6	2.9 × 10−2	44.7
4	210	2.0	2.1 × 10−2	40.3