▎ 摘　　要

NOVELTY - Preparation of two-dimensional chromium material (I), involves vacuumizing reaction chamber and making background vacuum reach 1x100Pa to 1x10-3Pa, mixing chromium source with additive material capable of reducing formation energy of chromium material (I), so that the mixture forms a first gaseous precursor and processing X source to form a second gaseous precursor, where the chromium source is chormium chloride, chromium bromide or chromium iodide, and X source is sulfur powder, selenium powder or hydrogen sulfide, and transferring first gaseous precursor and second gaseous precursor to substrate under reducing or oxidizing atmosphere for chemical reaction and subjecting the substrate to stepwise heating and constant temperature treatment during chemical reaction. USE - Preparation of two-dimensional chromium material. ADVANTAGE - The preparation method can effectively improve yield of preparing chromium material (I). DETAILED DESCRIPTION - Preparation of two-dimensional chromium material of formula: CrX2(I), involves vacuumizing reaction chamber and making background vacuum reach 1x100Pa to 1x10-3Pa, mixing chromium source with additive material capable of reducing formation energy of chromium material (I), so that the mixture forms a first gaseous precursor and processing X source to form a second gaseous precursor, where the chromium source is chormium chloride, chromium bromide or chromium iodide, and X source is sulfur powder, selenium powder or hydrogen sulfide, and transferring first gaseous precursor and second gaseous precursor to substrate under reducing or oxidizing atmosphere for chemical reaction and subjecting the substrate to stepwise heating and constant temperature treatment during chemical reaction. X=S or Se.