▎ 摘　　要

NOVELTY - Controllable preparation of self-supporting two-dimensional mesoporous nanomaterial comprises (i) dissolving surfactant in deionized water, adding 2-methylimidazole, ultrasonically processing, dissolving metal salt in deionized water, mixing with mixed solution, and magnetically stirring; (ii) taking phenol and stirring, dropping sodium hydroxide solution, stirring, dropping formaldehyde solution and stirring, adding F127 solution, heat preserving, stirring, adding deionized water, heat preserving, stirring and taking out to obtain F127-resol; (iii) mixing above-mentioned Resol-F127 and MOF nanoplates, adding deionized water, placing in reactor, mixing and stirring, allowing to stand, hydrothermally reacting, centrifuging and washing with ionized water and absolute ethanol, freeze-drying; and (iv) placing two-dimensional F127-resol/MOF composite structure nanoplate in porcelain boat, placing in tube furnace, heating and cooling with the furnace. USE - The material is useful as carbon-based electro-catalyst. ADVANTAGE - The method is simple, mild and environmentally friendly and does not need to introduce strong corrosive or toxic material e.g. hydrofluoric acid to take out the template to obtain the mesoporous and effectively prevents the interlayer agglomeration of the two-dimensional material, improves the surface contact and catalytic activity site of the ion and promotes the diffusion of the ion in the interlayer space. The material has good conductivity. DETAILED DESCRIPTION - Controllable preparation of self-supporting two-dimensional mesoporous nanomaterial comprises (i) dissolving 0.98 mg surfactant in 5 ml deionized water, adding 1.06 g 2-methylimidazole, ultrasonically processing to completely dissolve and obtaining a mixed solution, dissolving 0.3 g metal salt in 5 ml deionized water, mixing with the mixed solution, magnetically stirring for 15-30 seconds, allowing to stand for 2-6 hours, and centrifugally washing with deionized water to obtain metal-organic framework (MOF) nanoplates; (ii) taking 0.6 g phenol and stirring at 50 degrees C until it melts, dropping 15 ml 0.1 M sodium hydroxide solution, stirring until the temperature stabilizes at 70 degrees C, dropping 2.1 ml 37 wt.% formaldehyde solution and stirring for 30 minutes, adding 15 ml 0.96 g F127 solution, heat preserving at 66 degrees C, stirring for 2 hours, adding 50 ml deionized water, heat preserving at 70 degrees C, stirring for 12-16 hours and taking out to obtain F127-resol; (iii) mixing the above-mentioned Resol-F127 and MOF nanoplates, adding deionized water to make the volume 35 ml, placing in the reactor, mixing and stirring for 30 minutes, allowing to stand for 12 hours, hydrothermally reacting at 100-130 degrees C for 22-24 hours, centrifuging and washing with ionized water and absolute ethanol, freeze-drying for 12 hours to obtain two-dimensional F127-resol/MOF composite structure nanoplates; and (iv) placing the two-dimensional F127-resol/MOF composite structure nanoplate in the porcelain boat, placing in a tube furnace and heating to 350 degrees C for 1 hour under a nitrogen atmosphere and heating to 900 degrees C for 3 hours, cooling with the furnace.