Multi-anions-coupled electronic states in Cl−-doped BiOBr induce highly efficient decomposition of tetracycline hydrochloride

Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure

“…71 The polarization of the internal electric field is possible to occur due to anionic doping, which is beneficial to the charge transport directed by the electric field force. 22,72 However, our GIXRD results showed that c values increased with I − doping (Table S1), corresponding to an enlarged interlayer space, and thus a longer distance for the charge transport, against the efficient separation of photogenerated charge carriers. 73,74 As a result, synergistically influenced by the above factors, the charge separation and transport efficiency of iodide-doped BiOBr was improved and maximized when the I − concentration reached 2.7 atom %, making for the optimized visible-light photocatalytic performance.…”

“…Different material strategies have been recently explored to enhance the photocatalytic properties of BiOBr systems, including controlled growth of specific morphologies and active facets − or the engineering of heterojunction systems, together with semiconductors such as AgBr, C 3 N 4 , and CdS. − An interesting strategy is the formation of solid solutions, such as BiOCl x Br 1– x and BiOBr x I 1– x , which promotes photon absorption at the low-energy end of the visible range. − Conveniently, BiOX materials form similar crystal structures and compositions, with Cl – and Br – or Br – and I – showing similar ionic radii (Cl – = 1.67 Å, Br – = 1.82 Å, and I – = 2.06 Å), allowing for the continuous adjustment of band structures upon doping with minimum formation of detrimental crystal defects …”

“… 16 − 18 An interesting strategy is the formation of solid solutions, such as BiOCl x Br 1– x and BiOBr x I 1– x , which promotes photon absorption at the low-energy end of the visible range. 19 − 22 Conveniently, BiOX materials form similar crystal structures and compositions, with Cl – and Br – or Br – and I – showing similar ionic radii (Cl – = 1.67 Å, Br – = 1.82 Å, and I – = 2.06 Å), 23 allowing for the continuous adjustment of band structures upon doping with minimum formation of detrimental crystal defects. 24 …”