The present invention relates to a synthesis of novel Zn(II)-based Metal Organic Frameworks having mixed organic ligands of 1,3,5-benzene tricarboxylic acid (BTC) and 2-methylimidazole (mIm) through a simple and economic solvothermal method. The synthesized MOFs has cuboids morphology having high surface area (1248 m2/g) capable of hydrogen adsorption at −10° C. to 25° C. temperature and 100 bar pressure. The hydrogen adsorption capabilities of the novel MOFs are in the range of 23-0.2 weight percent.