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以羧甲基纤维素和十六烷基三甲基溴化铵为双模板,制备出了具有更高稳定性并且具有高度有序二维六方结构的MCM-41介孔分子筛.透射电镜和X射线衍射结果表明,以双模板制备的MCM-41介孔分子筛具有高度有序的二维六方(p6mm)孔道结构.此外,以双模板制备的MCM-41介孔分子筛焙烧前后的X射线衍射结果表明,在焙烧过程中其晶胞收缩比例为3.1%.与以纯表面活性剂为模版制备的MCM-41介孔分子筛(晶胞收缩比例为9.7%)相比,双模板制备的MCM-41介孔分子筛具有更高的稳定性能. MCM-41介孔分子筛稳定性能的提高可能是由于在硅物种、表面活性剂以及羧甲基纤维素在自组装过程中,羧甲基纤维素表面丰富的羟基与硅物种Si-(OH)x的相互作用促进了Si-(OH)x的缩聚.
MCM-41 mesoporous molecular sieves with higher stability and highly ordered two-dimensional hexagonal structure were prepared by using carboxymethylcellulose and cetyltrimethylammonium bromide as templates.Transmission electron microscopy and X Ray diffraction results showed that the MCM-41 mesoporous molecular sieve prepared by dual-template has highly ordered two-dimensional hexagonal (p6mm) pore structure.In addition, the results of X-ray diffraction before and after calcination of MCM-41 mesoporous molecular sieve prepared by dual template The results showed that the cell shrinkage ratio was 3.1% during the calcination process.Compared with the MCM-41 mesoporous molecular sieve prepared by using pure surfactant (the cell shrinkage ratio was 9.7%), the double template MCM-41 Porous zeolites have higher stability.Improvement of the stability of MCM-41 mesoporous molecular sieves may be due to the silicon species, surfactants and carboxymethyl cellulose in the self-assembly process, carboxymethyl cellulose surface rich in hydroxyl The interaction with Si- (OH) x promoted the polycondensation of Si- (OH) x.