Abstract: Mn-MCM-41 mesoporous molecular sieves with highly ordered structure are synthesized through hydrothermal synthesis method by using cetyltrimethylammonium bromide (CTAB) as template agent,tetraethyl orthosilicate (TEOS) as silicon source,manganese nitrate (Mn(NO3)2) as manganese source and ammonia as alkaline medium.Mn-MCM-41 samples with molar ratios of Si to Mn being 100:1 and 50:1 respectively are prepared successfully according to synchronous and asynchronous preparing methods,separately.X-ray diffraction (XRD),N2 adsorption-desorption,Fourier transform infrared spectroscopy (FTIR),scanning electron microscope (SEM) and transmission electron microscopy (TEM) are used to characterize the prepared samples.It is observed that with the increase of Mn loading amount in mesoporous molecular sieve,the mesoporous ordering property gets deteriorated and both specific surface area and pore size of Mn-MCM-41 decreases.It is also found that synchronous and asynchronous preparing methods (different dosing sequence of Mn(NO3)2) can result in different mesoporous structure of Mn-MCM-41.The catalytic performance of the prepared Mn-MCM-41 is investigated through catalytic ozonation of nitrobenzene under different pH conditions.It is found both the degradation rate and ozonation decomposition rate of nitrobenzene over Mn-MCM-41 are far higher than that without presence of catalyst,and change regularly with changes of pH value.
刘佳, 隋铭皓, 盛力. Mn-MCM-41介孔分子筛的制备、表征及催化性能研究[J]. 现代化工, 2018, 38(7): 93-97.
LIU Jia, SUI Ming-hao, SHENG Li. Hydrothermal synthesis,characterization and catalytic performance of Mn-MCM-41 mesoporous molecular sieve. Modern Chemical Industry, 2018, 38(7): 93-97.
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