Efficient and environment-friendly method for preparing graphite oxide

The invention provides an efficient and environment-friendly method for preparing graphite oxide. The efficient and environment-friendly method includes steps of uniformly mixing graphite and concentrated sulfuric acid solution with each other to obtain mixtures, slowly adding strong oxidizing agents into the mixtures at the room temperature and stirring the strong oxidizing agents and the mixtures for 5-20 min; slowly adding deionized water into the mixtures and keeping the concentration of sulfuric acid in a range of 85-98%; carrying out reaction at the temperatures of 50-80 DEG C for 10-60 min to obtain graphite oxide and concentrated sulfuric acid dispersion liquid; carrying out pumping filtration on the graphite oxide and concentrated sulfuric acid dispersion liquid; reserving sulfuric acid filter liquid; washing graphite oxide filter cakes by the aid of deionized water and regulating graphite oxide until the concentration of the graphite oxide is 0.1g/L-10g/L; uniformly mixing the recycled sulfuric acid filter liquid, then slowly adding strong oxidizing agents into the sulfuric acid filter liquid at the room temperature and stirring the strong oxidizing agents and the sulfuric acid filter liquid for 5-20 min; carrying out reaction at the temperatures of 40-80 DEG C for 10-60 min and repeatedly carrying out the steps. The efficient and environment-friendly method for preparing the graphite oxide has the advantages of high efficiency, environmental friendliness, simple and feasible techniques, low production cost, high production efficiency and suitability for industrial large-scale popularization.