▎ 摘 要
NOVELTY - Preparing nano primary battery, comprises adding graphene oxide and iron-copper nano polymer into ethanol, dissolving in 2-nitrobenzaldehyde, stirring to obtain graphene oxide modified with 2-nitrobenzaldehyde as substrate, and iron-copper nano polymer loaded with iron-copper based nano primary battery. USE - The nano primary battery is useful for simultaneously removing chromium (VI), and cadmium (II) (claimed). ADVANTAGE - The nano primary battery has simple and convenient preparation method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of nano primary battery.