Preparation method of nano composite material with high photocatalytic efficiency

The invention discloses a preparation method of a nano composite material with high photocatalytic efficiency, which comprises the following steps: by taking graphite powder as a raw material, and taking concentrated sulfuric acid and potassium permanganate as oxidants, graphene oxide is prepared by adopting an improved Hummers method; and graphene oxide is used as a precursor to react with titanium dioxide under a hydrothermal condition to generate the graphene-titanium dioxide nanocomposite, or at least one of a nitrogen source or a vanadium source is added into a reactant to prepare the doped and modified graphene-titanium dioxide nanocomposite. The photocatalytic material has the characteristics of stable chemical properties, high photocatalytic activity, no toxicity, easiness in preparation, low cost and the like, has huge application potential in the field of sewage treatment, has practical significance, and can be popularized in practical application. 本发明公开了一种高光催化效率纳米复合材料的制备方法，以石墨粉为原料、浓硫酸和高锰酸钾作为氧化剂，采用改