▎ 摘　　要

NOVELTY - Preparing nanoporous graphene filtering membrane involves adding sulfate solution (4-6L) to heat-resistant container. Spectroscopically pure graphite rod electrode are placed in container. Cathode has diameter of 12-20mm and anode has diameter of 6-8mm. The two electrodes are arranged along straight horizontal line, and submerged under liquid surface at 40-100mm deep. The electrodes are applied with current and voltage that are controlled 70-80Ampere and 24-27Volts respectively. The arc gap between the electrodes is 0.8-1mm. The graphite anode arc is discharged. USE - Method for preparing nanoporous graphene filtering membrane (claimed). ADVANTAGE - The method enables to prepare nanoporous graphene filtering membrane, which eliminates vacuum and circulating water system, and has simple operation and excellent electromagnetic and optical properties, and is cost-effective. DETAILED DESCRIPTION - Preparing nanoporous graphene filtering membrane involves adding sulfate solution (4-6L) to heat-resistant container. Spectroscopically pure graphite rod electrode are placed in container. Cathode has diameter of 12-20mm and anode has diameter of 6-8mm. The two electrodes are arranged along straight horizontal line, and submerged under liquid surface at 40-100mm deep. The electrodes are applied with current and voltage that are controlled 70-80Ampere and 24-27Volts respectively. The arc gap between the electrodes is 0.8-1mm. The graphite anode arc is discharged, evaporated, steamed and reacted with carbon, hydrogen and carbon monoxide. Metal ions are reduced into salt solution to obtain nanoscale metal particles. The reacted metal particles are separated from graphene film, and subjected to etching to obtain nanoscale pores. The film is cooled for 10-15 minutes after discharging, and dried to obtain the graphene nanopore membrane.