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. 2022 Oct 1;380(6):51. doi: 10.1007/s41061-022-00409-2

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Fig. 6 — (A) Scheme of the transfer of charge carriers under visible-light illumination (left) when TiO₂ is coupled with a low-bandgap semiconductor (SC), and under UV–Vis illumination (right). (B) The formation of the heterojunction (left) and the p–n junction (right) between TiO₂ and β-Bi₂O₃ and plausible charge carrier migration cascade under visible-light illumination