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Hollowed-out hierarchical Co3O4 microrods has been synthesized via the interfacial-reaction of CoC2O4·2H2O with NaOH. Field emission scanning electron microscopic and transmission electron microscopic results revealed that the Co3O4 samples were hollowed-out hierarchical microrod-like structure assembled by interlaced thin nanosheets (with thickness of around 7nm). The gas sensing properties of the...
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