Based on table 4 results, by increasing the percentages of nickel ferrite from 10 to 50%, the BET surface area increases and pore volume decreases. These pores, which are only due to the presence of the HKUST-1 metal-organic framework, are not uniform in pores diameter because the ferro-nickel nanocomposites are non-dispersed. Also, as the percentage of nickel ferrite, which is the same as the heavy nuclei in the silica bed, increases, these pores fill and the pore volume decreases [28]. According to SEM images and BET analysis, the synthesized magnetic metal-organic framework nanocomposite is a porous material and since the pore diameter of these nanocomposites is bigger than 4 nm, they are in the category of mesoporous materials. These pores, which are only due to the presence of the HKUST-1 metal-organic framework, are not uniform in diameter because nickel ferrite nanocomposites are non-dispersed in them. Therefore, as the percentage of nickel ferrite, which is the heavy nuclei in the silica bed, increases, these pores fill and the pore volume decreases [28].