▎ 摘　　要

NOVELTY - Controllable synthesis method of graphene manganese oxide nano composite material, involves (i) adding deionized water with manganese acetate, ultrasonically processing, and stirring under reflux, (ii) dripping ethanol, and dripping ammonia, warming and reacting, centrifuging, washing and vacuum drying to obtain precursor, (iii) adding oxidized graphene with water, ultrasonically processing, (iv) adding precursor with ultrasonically processed graphene oxide solution, stirring, performing hydrothermal treatment, (v) cooling, taking out supernatant, freeze-drying and vacuum-drying. USE - Controllable synthesis method of graphene manganese oxide nanocomposite material e.g. graphene-manganese carbon oxide photocatalyst. ADVANTAGE - The nanocomposite material is a graphene-manganese carbon oxide photocatalyst which can controllably synthesize different phases by changing the addition amount of graphene oxide. The graphene-manganese carbon oxide nanocomposite material has excellent photocatalytic degradation effect of organic pollutant. The graphene-manganese carbon oxide nanocomposite material is prepared with high purity, simply and easily at low production cost. DETAILED DESCRIPTION - Controllable synthesis method of graphene manganese oxide nano composite material, involves (i) weighing 1-3 g manganese acetate in a 25-ml beaker, adding 5-10 ml deionized water and placing in an ultrasonic cleaner, ultrasonically processing to clarify, transferring to 250 ml three-necked flask and stirring under reflux, (ii) dripping 6-130 ml ethanol at 45 degrees C within 15 minutes, then dripping 5-10 ml ammonia, warming at 80 degrees C, and reacting for 3 hours, carrying out centrifugation, washing and vacuum drying to obtain precursor, (iii) adding 10-20 ml water separately to six 25-ml beakers, then adding 2-25 ml oxidized graphene having concentration of 4.6 mg, ultrasonically processing in a water bath for 30 minutes, (iv) weighing 0.2 g precursor, adding to ultrasonically processed graphene oxide solution, stirring for 15 minutes to mix evenly, then transferring to a 25 ml PTFE-containing hydrothermal tank, carrying out hydrothermal treatment at 150-200 degrees C for 12 hours, (v) cooling to room temperature, taking out the supernatant, carrying out freeze-drying and vacuum-drying on the obtained columnar materials respectively to obtain reduced graphene oxide-manganese(II,III) oxide/manganese carbonate nanocomposite with different graphene contents.