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. 2016 Mar 21;6:23435. doi: 10.1038/srep23435

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(a) Schematic of the energy bands of (BiO)₂CO₃ and Bi₂O₃ and the transfer of photo-generated charges in BOC-based heterojunctions under simulated solar light (λ > 290 nm) irradiation. (b) DMPO-ESR spin-trapping spectra of (BiO)₂CO₃, BOC-400, BOC-450, and Bi₂O₃ for the detection of hydroxyl radicals (⋅OH) in aqueous solution under UV light irradiation.