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The electrospun Co3O4 nanotubes encapsulated by graphene membrane are successfully synthesized via a novel and efficient method. The Co3O4 nanotubes with the diameter of ~200 nm are prepared by electrospinning combined with sintering process. Graphene is wrapped on the charge-modified surface of Co3O4 nanotubes by the mutual electrostatic interactions. The as-prepared graphene/Co3O4 nanotubes are...
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