▎ 摘　　要

NOVELTY - Preparation of sulfur-doped graphene thin film by chemical vapor deposition includes heating and preprocessing the metal substrate in atmosphere of reduction protective gas; vacuuming until vacuum degree of container is 0.01-0.001 torr; introducing mixed liquid of carbon source and sulfur source into the container; obtaining sulfur-doped graphene thin film on metal substrate; rapidly cooling the reactor; and conducting post-treatment. USE - Preparation of sulfur-doped graphene thin film (claimed). DETAILED DESCRIPTION - Preparation of sulfur-doped graphene thin film by chemical vapor deposition comprises placing metal substrate into a reactor; completely discharging gas in the reactor by filling with reduction protective gas; heating and preprocessing the metal substrate in atmosphere of reduction protective gas at 400-500 degrees C; heating the metal substrate at 900-1000 degrees C; stopping filling of reduction protective gas; vacuuming until vacuum degree of container is 0.01-0.001 torr; introducing mixed liquid of carbon source and sulfur source into the container; obtaining sulfur-doped graphene thin film on metal substrate; rapidly cooling the reactor at 800 degrees C; stopping filling of carbon source and sulfur source; filling reduction protective gas; continuously reducing the temperature in the reactor to room temperature; taking out the metal substrate having sulfur-doped graphene thin film; spinning polymethylmethacrylate thin film on the surface; removing the metal substrate by a solution in which the metal substrate is dissolved; transferring the composite film of sulfur-doped graphene thin film and polymethylmethacrylate thin film onto the substrate material; and removing polymethylmethacrylate thin film to obtain sulfur-doped graphene thin film. INDEPENDENT CLAIMS are included for: (1) sulfur-doped graphene thin film; and (2) preparation of liquid carbon source and sulfur source comprising mixing powder with hexane; and ultrasonically processing for 20 minutes to obtain uniform and transparent solution.