▎ 摘　　要

NOVELTY - Preparing cobalt tetroxide nanowire array modified phosphorus-doped graphene fiber, comprises (i) mixing phytic acid and graphene oxide solution in a mass ratio of 0.5-2 to obtain a spinning solution and preparing the phytic acid-graphene oxide fiber by adopting a wet spinning process, (ii) carrying out reduction treatment on the phytic acid-graphene oxide fiber obtained in the resultant step to reduce oxygen-containing functional groups on the surface of the graphene oxide, cleaning and drying the fiber after the reduction treatment to obtain the phytic acid-graphene fiber, (iii) placing the phytic acid-graphene fiber obtained in the resultant step and a reaction solution containing cobalt nitrate and 2, 4-dihydroxybenzoic acid into a closed system for solvothermal reaction, cleaning and drying the reacted fiber to obtain the cobalt-based nanowire array modified graphene fiber, and (iv) calcining the resultant graphene fiber in an inert gas atmosphere to obtain the final product. USE - The cobalt tetroxide nanowire array modified phosphorus-doped graphene fiber is useful in super capacitor, electrochemical biosensor, photoelectrochemical sensor or flexible wear-resistant device (claimed). ADVANTAGE - The method: is economical, environmentally friendly and suitable for mass production and has simple process flow; and avoids the problem of fussy when the performance fiber graphene in the prior art. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for cobalt tetroxide nanowire array modified phosphorus-doped graphene fiber prepared by the above mentioned method.