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In this work, we have developed a facile and rapid synthesis of urchin-shaped Fe3O4@Bi2S3 core-shell hierarchical structures through a sonochemical method. The as-prepared Fe3O4@Bi2S3 hierarchical core-shell structures show excellent photocatalytic efficiency for the degradation of rhodamine B (RhB) and retained this photocatalytic activity after being recycled five times with the help of an external magnetic field. The possible mechanism for the formation of the urchin-shaped Fe3O4@Bi2S3 core-shell structures is also proposed. These novel urchin-shaped Fe3O4@Bi2S3 core-shell structures may have potential applications in water treatment, sensors, and energy storage.
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Luo et al. (2012) studied this question.
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