The spinel-type aluminates MAl2O4 (M = Mg, Sr and Ba) have showed potential application as photocatalysts in hydrogen production.
The formation of nano-steps in the particle enhances the photocatalytic activity.
The presence of Al2O3 improve the photocatalytic activity of MgAl2O4.
The MgAl2O4/Al2O3 exhibited a hydrogen efficiency of 4.0%. It means around 64 μmol·g−1·h−1.