Hollow shells: Quasi-uniform BiOBr hollow microspheres, with diameters in the range of 1–2 μm and a shell thickness of ≈100 nm, were synthesized by a one-pot miniemulsion-mediated route (see picture), which exhibits superior visible-light photocatalytic performances in decontamination of organic dyes and heavy metal ions.
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Cheng et al. (2011) studied this question.
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