▎ 摘　　要

NOVELTY - A three-dimensional reduction graphene oxide-manganese oxide/manganese carbonate nanocomposite complete degrades 105 mol/l methylene blue in 100 ml concentration containing 50 mg nanocomposite during non-noble metal catalysis and has high arsenic ion adsorption effect. USE - Three-dimensional reduction graphene oxide-manganese oxide/manganese carbonate nanocomposite used for photocatalytic degradation of organic pollutants and heavy metal ion adsorption. ADVANTAGE - The nanocomposite having high purity is prepared economically by a simple method and with high yield. The nanocomposite has excellent photocatalytic degradation effect and heavy metal ion adsorption performance. The nanocomposite has excellent reusability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the nanocomposite material, which involves ultrasonically dissolving 1-3 g manganese acetate in 5-10 ml deionized water, adding 6-130 ml ethanol, gradually adding 5-10 ml aqueous ammonia, reacting the contents at 80 degrees C for 3 hours, centrifuging the mixture, washing and vacuum drying the product, dispersing the dried product in 4.6 g/l oxidizing agent, stirring for 15 minutes, regulating the pH to 3.5-9.5, hydrothermally processing the obtained contents in a muffle furnace at 150-200 degrees C, filtering the obtained product, washing, and freeze-drying.