Er3+-doping induced formation of orthorhombic/monoclinic Bi5O7I heterostructure with enhanced visible-light photocatalytic activity for removal of contaminants

Bi5O7I is a member of the bismuth oxyiodides family with unique layered structures, generating an internal electrostatic field to promote the separation and transfer of photogenerated charge carriers. To further enhance its visible-light photocatalytic activity, various strategies, including creating the heterojunction, forming the defects, and engineering the bandgap and composition, have been applied. Another promising strategy is to construct...