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The well-dispersed Co3O4 nanoparticles-decorated crumpled graphene microsphere(CGM)was successfully prepared by aerosol-assisted frying self-assembly and annealing process.It is found that the obtained Co3O4/CGM nanohybrid possessed enhanced intrinsic peroxidase-like activity and could catalytically oxidize TMB by H2O2 to produce a typical blue product.