Origin of Tunable Photocatalytic Selectivity of Well‐Defined α‐Fe₂O₃ Nanocrystals

Abstract

Visible-light induced degradation of an aqueous mixture containing MO and RhB on well-defined α-Fe2 O3 nanocrystals shows that MO degradation is more favorable and such selectivity on the {012} facet is greater than that on {001}. The origin of selectivity is rationalized as the inherent surface structural difference and preferential molecular adsorption.