▎ 摘　　要

NOVELTY - Nanocomposite material preparation involves dissolving solid graphene oxide in distilled water to form graphene oxide aqueous solution. Ferric sulfate is dissolved in the formed graphene oxide aqueous solution to obtain a mixed solution. The mixed solution is dried to obtain a graphene oxide/ferric sulfate solid mixture. The obtained graphene oxide/ferric sulfate solid mixture is transferred into sealing device including inert gas, and then heated by using tubular heater. The formed product is cooled at room temperature to give the final nanocomposite material. USE - Method for preparing nanocomposite material for microfluidics sensitive detection of lactic acid by colorimetry (claimed) and for use in photoelectrochemical sensing, catalysis and battery materials. ADVANTAGE - The method prepares the nanocomposite material in a simple manner with good catalyze effect. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic transmission electron microscopic image of the nanocomposite material.