Aluminum-based metal-organic framework having three dimensional porous structure and comprising at least two types of ligands, preparation method therefor, and use thereof

A method for preparing a metal-organic framework having a hexagonal crystal structure or a mixed hexagonal and tetragonal crystal structure with a three-dimensional porous structure represented by Chemical Formula 1, the method comprising performing a reaction by hydrothermal synthesis using a reaction solution prepared by adding a ligand precursor solution to a metal precursor solution providing trivalent aluminum ions:

• [Al8(OH)a(BTC)b(IPA)c(L)d] [Chemical Formula 1]
• wherein,
• L is an isophthalic acid analog;
• and
• 8≤a≤22, 0.15≤b≤3.1, and 0.3≤c+d≤8.1, in which c and d each are independently a rational number of 0 or greater, wherein BTC represents 1,3,5-benzenetricarboxylic acid, and IPA represents isophthalic acid.