Synthesis of hetero-atom MCM-41 mesoporous molecular sieve under microwave condition

Silica MCM-41 and Ni(Co or Cu) MCM-41 mesoporous molecular sieve were synthesized by microwave irradiation method using cetyltrimethyl ammonium bromide as template and sodium silicate,nickel chloride,cobalt chloride and cooper chloride as raw materials,respectively.The synthesized samples were characterized by X-ray diffractometry,transmission electron microscopy,specific surface area analysis,Fourier transform infrared spectroscopy and N2 physical adsorption.After hetero-atom(Ni,Co or Cu) was introduced into silica MCM-41 mesoporous molecular sieve,the effects of hetero-atom(Ni,Co or Cu) on its specific surface area,mesoporous ordering and pore size were also investigated.The results show that silica MCM-41 and Ni(Co or Cu) MCM-41 mesoporous molecular sieves are synthesized.The template is effectively removed from the samples after calcinations at 550 ℃,and the pore structure of the synthesized samples is not damaged.After hetero-atom Ni(Co or Cu) is introduced into silica MCM-41 mesoporous molecular sieve,its specific surface area and average pore size increase and mesoporous order becomes good.