制备体系酸度对AlMSU介孔材料结构性能的影响

利用β沸石纳米簇和曲拉通TX-100分别作为骨架构筑前驱物和孔道导向剂，在酸性介质中通过(N^oH⁺)Cl^-S⁺组装机制合成了蠕虫状孔道排列的AlMSU介孔材料，并借助测试手段对其进行了系统表征。结果表明：制备体系盐酸浓度对AlMSU的结构性能、骨架组成及收率有着显著影响。介质酸浓度较低（<0.5mol/L）时所得AlMSU的物化性质较差，而且产物收率低（基于样品粉末质量）；而体系酸浓度大于2.5mol/L时将造成部分铝原子从骨架中析出，导致最终产物中铝元素含量显著降低。基于结构性能、骨架组成和样品收率等综合因素，体系酸浓度介于1.5~2.0mol/L时是合成AlMSU介孔材料的合适区间

Effect of system acidity on the structural properties of mesoporous AIMSU materials

A series of AlMSU mesostructures with wormhole frameworks have been successfully synthesized using pre-assembled zeolite nanoclusters and nonionic TX-100 as the inorganic precursor and structure-directing agent,respectively,under acidic conditions.It was shown that,on the basis of careful structural characterization,the acidity of the synthesis medium had a significant impact on the textural characteristics,framework composition and yield of the final mesostructure.Low-quality AlMSU was obtained when the acid concentration was low(about 0.5mol/L).In contrast,most of the beta zeolite nanoclusters were destroyed during the self-assembly process under extremely acidic conditions(e.g.,3.0mol/L).Therefore,an optimal acid concentration between 1.5 and 2.0mol/L is advantageous during the synthesis of AlMSU.