Nano-diamond surface boronation method

The invention discloses a nano-diamond surface boronation method and belongs to the field of material processing. Nano-diamond particles and water-soluble boron sources are uniformly mixed and calcined in an oxygen-free environment at the temperature of 500-1,100 DEG C, finally, the water-soluble boron sources are washed away, and boronized nano-diamond particles coated with boron elements on the surfaces are prepared. The initial oxidation temperature of the prepared boronized nano-diamond particles in air is increased to 625 DEG C, 68% of diamond is not oxidized after the prepared boronized nano-diamond particles are heated to 1,150 DEG C, and the oxidation resistance of the nano-diamond is greatly improved; the boronized nano-diamond particles contain a large quantity of boron-oxygen hydrophilic groups on the surfaces, and dispersion in the solution is facilitated. A synthesis technology of the prepared nano-diamond boronized particles adopts a simple technique process and is efficient, environment-friendly and safe.