▎ 摘　　要

NOVELTY - Electrochemical polishing solution comprises 50-200 pts. wt. phosphoric acid, 22-48 pts. wt. sulfuric acid or/and hydrochloric acid, 10-20 pts. wt. viscosity regulator and 20-30 pts. wt. deionized water. USE - The electrochemical polishing liquid is useful for pre-treatment of copper foil surface. ADVANTAGE - The electrochemical polishing liquid enables to pre-treat surface of copper foil in an efficient manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) pre-treatment of copper foil surface using pickling liquid comprising 3-5 pts. wt. nitric acid, 4-8 pts. wt. hydrochloric acid, 1 pts. wt. polyethylene glycol and 1-10 pts. wt. deionized water; (2) copper foil, prepared by pre-treatment of copper foil surface; and (3) use of copper foil in chemical vapor deposition (CVD)growth of graphene materials.