Co3O4 microbelts were prepared with cobalt nitrate and PVP as raw materials by an electrospinning technique combined with subsequent calcination. The belt-like Co3O4 was characterized by XRD, SEM, TEM, Fr-IR and its N-2 adsorption-desorption behavior was measured. In addition, its peroxidase-like activity was investigated with H2O2 and 3,3',5,5'-tetramethylbenzidine as substrates, and the product with the highest specific area exhibits the best catalytic activity and stability. (C) 2016 Elsevier B.V. All rights reserved.