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. 2014 Mar 21;4:4426. doi: 10.1038/srep04426

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(A) SEM images of the as-prepared (a) TiO₂ NPs film, (b) BiOI NFs/TiO₂ NPs/ITO, (c) TiO₂ NTs, (d) BiOI film/TiO₂ NTs. (B) The photocurrent responses of the (a) BiOI NFs/TiO₂ NTs, (b) BiOI NFs/TiO₂ NPs/ITO, (c) BiOI coating/TiO₂ NTs. All the tests were performed in 0.10 M PBS containing 0.10 M ascorbic acid with 0 V working potential and 470 nm excitation light.