Ammonia(NH3) is the main raw material of nitrogen fertilizer production

and it is also an important indirect source of PM2.5.The ammonia emission reduction and recycling are the necessary ways for green development

especially under the green industrial production cycle.Adsorption method has the noteworthy feature of the ammonia capture without phase change and the advantages that enrichment of ammonia can be directly related to carbon dioxide synthesis of nitrogen fertilizer(such as urea).This work studies the ammonia adsorption properties of the flexible reversible transformation MOFs material Cu(BDC).Three dimensional dense structure of Cu(BDC)(DMF) is prepared by hydrothermal method

and one-dimensional pore structure Cu(BDC) was obtained after the removal of DMF under heating at high temperature with changed crystal structure.The Cu(BDC) has the surface area of 535 m2·g-1 and the adsorption capacity of pure ammonia up to 18.4 mmol·g-1 in an atmospheric pressure

which is higher than the traditional adsorbent and other new porous materials such as MOFs and COFs.By reducing the pressure and vacuum heating

the Cu(BDC) can be progressively regenerated and thus has excellent “ammonia” characteristics.Additionally

Cu(BDC)(DMF) can be converted into Cu(BDC)(NH3)2 in the ammonia environment

eliminating the process of Cu(BDC) preparation.