Co-precipitation of Feub>3ub>Oub>4ub> over a nano support exhibited high dispersion.
High visible light Cr(VI) photoreduction over supported catalysts was observed.
Supported catalysts out performed their corresponding physical blends.
The 40% Feub>3ub>Oub>4ub>@Feub>2ub>Oub>3ub>/Alub>2ub>Oub>3ub> possessed excellent magnetic recoverability.