▎ 摘　　要

NOVELTY - An apparatus consists of a device configured for outputting an electromagnetic radiation and impinging the electromagnetic radiation on graphite oxide with an intensity of 0.5-7 W/cm2. USE - Apparatus is used as kit used for producing graphene (all claimed) used in electroconductive polymer composite, advanced electromagnetic interference shielding material, nanofluidics, battery, and engineering and environmental applications. ADVANTAGE - The apparatus enables efficient production of graphene with excellent thermal conductivity, electroconductivity, and strength, with high productivity at low temperature, by fast and environmentally-friendly process. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) kit for producing graphene, which consists of graphite oxide and the device; and (2) graphene, which has conductivity of more than 1000 S/m and oxygen content of less than 5 wt.%. The graphene is capable of producing a Raman spectrum having bands at 1360-1570 cm-1. The intensity of the band at 1360 cm-1 is less than or equal to half the intensity of band at 1570 cm-1. DESCRIPTION OF DRAWING(S) - The drawing shows the flowchart explaining method for converting graphite oxide into graphene. Placing dry graphite oxide in suitable container (S105) Passing electromagnetic radiation through converging lens (S110) Exposing graphite oxide to focused sunlight (S115) Increasing the temperature of graphite oxide (S120) Converting graphite oxide to graphene (S125)