Mo—MCM—48中孔分子筛微波辐射合成的研究

Study on Microwave Synthesis of Mesoporous Molecular Sieve Mo-MCM-48

在微波辐射下快速合成含Mo离子的MCM-48分子筛,考察了微波反应釜压力和反应时间对Mo-MCM-48合成的影响,并用XRD,TEM,FT-IR和N2吸附进行表征.结果表明:微波辐射下能快速合成结晶良好的Mo-MCM-48分子筛;合成时以0.4811MPa压力、反应2 h为宜;Mo离子进入了MCM-48分子筛的骨架;焙烧结果表明Mo-MCM-48热稳定性较好.苯乙烯催化氧化结果表明Mo-MCM-48具有一定的催化氧化活性.

Mesoporous molecular sieve containing molybdenum,Mo - MCM - 48,was rapidly synthesized under microwave radiation. Effects of the reaction pressure and reaction time on the relative crystallinity of Mo - MCM - 48 were investigated. The samples were characterized by using XRD,TEM,FT - IR and N-2 adsorption techniques. The results show that Mo - MCM - 48 molecular sieve with good crystallinity can be rapidly prepared under microwave radiation. Mo - MCM - 48 was well synthesized at 0.481 MPa for 2 h. Framework IR spectra of the samples affirm that the molybdenum cations are incorporated into frameworks of Mo - MCM - 48 molecular sieve. Calcination results indicate that Mo - MCM - 48 molecular sieve has high thermal stability. Catalytic oxidation of styrene with aqueous hydrogen peroxide (omega = 26%) indicates that Mo - MCM - 48 is catalytically active.