Synthesis of Fe-, Co- and Ni-Containing MCM-48 Using Long-Chain Ionic Liquid Template

The long-chain ionic liquid 1-hexadecyl-3-methylimidazolium chloride(C(16)mimCl) was used as the template to prepare Fe-, Co- and Ni-containing mesoporous silicas with a cubic MCM-48-type structure via a hydrothermal synthesis procedure. The samples were characterized by XRD, TEM, ICP-AES, FTIR., UV-Vis and N-2-adsorption-desorption. The effect of the amount of Co salt and C(16)mimCl in initial reaction mixture on the cubic mesostructure was discussed. The results show that the mesoporous materials obtained exhibit cubic Ia3d pore architectures, and are with high surface area and narrow pore size distribution. Co in the synthesis gel can be incorporated into the tetrahedral lattice site of mesoporous MCM-48, comparing with Fe- and Ni-doped. samples.