▎ 摘　　要

NOVELTY - Preparing a hollow graphene fiber comprises (i) preparing a substrate containing at least one circular hole; (ii) passing the capillary A through the circular hole, fixing all the boundaries of the circular hole to the outer wall of the capillary A and making the substrate perpendicular to the capillary A to obtain assembly of the substrate and the capillary A, where number of capillaries A is the same as the number of holes; (iii) inserting the assembly of the substrate, fixing capillary A into the capillary B; (iv) setting one end of the spinning nozzle to the S end, and the other end to the N end, connecting sample tubes A respectively to the ports of the capillary A of the S end, opening a hole in the wall of the capillary B and connecting the sample tube B to the hole to obtain a spinning device; and (v) placing the spinning device in an external coagulation bath and reducing hollow graphene oxide fiber. USE - The graphene fiber is useful for energy storage, conductive materials, tissue engineering, textile or biosensing (all claimed). ADVANTAGE - The method: produces highly precised product; and is simple, convenient and suitable for continuous and batch preparation of hollow graphene fibers. DETAILED DESCRIPTION - Preparing a hollow graphene fiber comprises (i) preparing a substrate containing at least one circular hole; (ii) passing the capillary A through the circular hole, fixing all the boundaries of the circular hole to the outer wall of the capillary A and making the substrate perpendicular to the capillary A to obtain assembly of the substrate and the capillary A, where number of capillaries A is the same as the number of holes; (iii) inserting the assembly of the substrate, fixing capillary A into the capillary B, where all the boundaries of the outer periphery of the substrate to the inner wall of the capillary B and making the substrate perpendicular to the capillary B to obtain a spinning nozzle; (iv) setting one end of the spinning nozzle to the S end, and the other end to the N end, connecting sample tubes A respectively to the ports of the capillary A of the S end, where number of the sample tubes A is the same as the number of the capillaries A, opening a hole in the wall of the capillary B, the hole is located between the junction of the tube on the wall of the capillary B and the port of the N-terminal capillary B and connecting the sample tube B to the hole to obtain a spinning device; and (v) placing the spinning device in an external coagulation bath, passing graphite oxide spinning dope firstly into the N end of the spinning nozzle by the sample tube B and passing internal coagulation bath into the spinning nozzle by the sample tube A in N-terminal to produce hollow graphene oxide fibers and reducing hollow graphene oxide fiber. An INDEPENDENT CLAIM is also included for hollow graphene fiber, prepared as mentioned above.