▎ 摘　　要

NOVELTY - Preparing boron-nitrogen co-doped reducing graphene oxide gas gel involves dispersing the graphene oxide in water to obtain graphene oxide dispersion liquid, then adding ammonia borane into the graphene oxide dispersion liquid, performing hydrothermal reaction to obtain boron-nitrogen co-doped reduction-oxidation graphene hydrogel. The boron-nitrogen co-doped reducing graphene oxide hydrogel is washed, freezed and dried to obtain the boron-nitrogen co-doped reducing graphene oxide aerogel. USE - Method for preparing boron-nitrogen co-doped reducing graphene oxide gas gel used in mercury ion detection (claimed). ADVANTAGE - The method constructs a sensing method by fluorescent group. The detection of mercury ion hashigh sensitivity, high selectivity, can be used for quantitative detection of trace mercury ion in water. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for detection method of mercury ion, which involves: (A) dispersing the boron-nitrogen co-doped reducing graphene oxide aerogel and the ssDNA molecule marked by carboxyl fluorescein in the Tris-hydrochloride (HCl) buffer solution; (B) incubating for a period of time at room temperature to obtain the mercury ion detection liquid, where the mercury ion standard solution with different concentrations and the mercury ion detection liquid uniformly according to a certain proportion; (C) incubating for a period of time at room temperature; (D) detecting the fluorescence intensity at 520 nanometer (nm); (E) making the linear relationship of the corresponding fluorescence intensity of mercury ion with different concentrations; (F) mixing the solution to be tested and the mercury ion detection liquid according to the same proportion; (G) incubating under the same condition; (H) detecting the fluorescence intensity at 520nm; and (I) calculating to obtain the concentration of mercury ion in the solution to be measured according to the linear relationship.