▎ 摘　　要

NOVELTY - A graphene-filter paper preparing method involves preparing graphene oxide solution, and utilizing qualitative filter paper for laboratory use. The filter paper is immersed in graphene oxide solution, removed, dried in oven and subjected to repeat immersing and drying process for several times to prepare graphene oxide-filter paper. The graphene oxide-filter paper is reduced with hydrazine hydrate steam to obtain the finished product, where the concentration of the graphene oxide aqueous solution is 2-10 mg/ml, and the diameter of the filter paper is 4-16 cm. USE - Method for preparing graphene-filter paper for use as a self-supporting flexible electrode in a hydrogen peroxide electrochemical sensor for detecting hydrogen peroxide content (all claimed). ADVANTAGE - The method enables preparing graphene-filter paper with good specific surface area and high sensitivity.