Method for oxidizing sulfilimine into sulfoximide

The invention provides a method for oxidizing sulfilimine into sulfoximide. The method comprises the following steps: preparing a tungsten oxide WO3-x nanosheet catalyst, and carrying out WO3-x nanosheet catalyzed oxidation of sulfilimine. The method has the advantages of simple reaction conditions, no pollution in the whole reaction steps, low cost, important industrial application values, and important environmental and social significance.