Preparation method of high-dispersion Pt-loaded boron nitride aerogel and application of high-dispersion Pt-loaded boron nitride aerogel in cooperation with plasma catalysis of methane selective oxidation

The invention discloses a preparation method of high-dispersion Pt-loaded boron nitride aerogel and application of the high-dispersion Pt-loaded boron nitride aerogel in cooperation with plasma catalysis of methane selective oxidation, and the preparation method comprises the following steps: dissolving a Pt source, a boron source and an amine source in an alcohol-water mixed solution to obtain a mixture, heating and stirring the mixture to dissolve to obtain a transparent mixed solution, performing ultrasonic treatment on the transparent mixed solution to obtain white hydrogel, cooling the transparent mixed solution to 25 DEG C in the ultrasonic treatment process, and performing freeze drying on the white hydrogel to obtain a white aerogel precursor. According to the method, a high-dispersion Pt-confined ultralight tubular or fibrous boron nitride aerogel base material is prepared in situ, the base material is used as a catalyst to cooperate with low-temperature plasma to catalyze methane selective oxidation