CAJ | 학술논문

以Y沸石纳米晶为构筑元件，在碱性环境中于表面活性剂十六烷基三甲基溴化铵的模板作用下，合成了一种高度有序的纯相介孔分子筛MY。表征结果表明，MY的孔壁组成不同于常规的MCM-41，前者的晶胞参数及孔壁厚度大于常规MCM-41的，且前者的孔壁厚度达到2.02 nm，为后者的（1.01 nm）2倍，且前者的孔壁中含有Y沸石的纳米晶结构单元。由于Y沸石纳米晶的引入，MY在具有规则介孔的同时也具有较多的微孔结构，这种介-微孔双模孔结构有利于改善活性位的可接近性。Y 沸石纳米晶的引入还使得 MY 的模板剂热分解温度明显低于MCM-41的，使得MY的水热稳定性显著优于MCM-41，经800℃的100%水蒸气处理2 h后，MY仍然能够保留33.5%的介孔结构。
이Y비석납미정위구축원건，재감성배경중우표면활성제십륙완기삼갑기추화안적모판작용하，합성료일충고도유서적순상개공분자사MY。표정결과표명，MY적공벽조성불동우상규적MCM-41，전자적정포삼수급공벽후도대우상규MCM-41적，차전자적공벽후도체도2.02 nm，위후자적（1.01 nm）2배，차전자적공벽중함유Y비석적납미정결구단원。유우Y비석납미정적인입，MY재구유규칙개공적동시야구유교다적미공결구，저충개-미공쌍모공결구유리우개선활성위적가접근성。Y 비석납미정적인입환사득 MY 적모판제열분해온도명현저우MCM-41적，사득MY적수열은정성현저우우MCM-41，경800℃적100%수증기처리2 h후，MY잉연능구보류33.5%적개공결구。
A highly-ordered pure-phase mesoporous material MY was successfully synthesized via the C16H33(CH3)3NBr (CTABr) templated assembly of preformed nano-crystals of zeolite Y under basic conditions. The characterization results showed that different from the conventional mesoporous material MCM-41, Mesoporous Y (MY) contained nano-sized building units of zeolite Y and thus had larger cell parameters and wall thickness; moreover, due to the introduction of nano-crystals of zeolite Y, MY simultaneously owned well-developed microporous and mesoporous structures, which endowed the resulting material with enhance accessibility and led to the lower decomposition temperature of the template. The hydrothermal stability tests revealed that the MY synthesized had much higher stability than MCM-41, giving a crystallinity of 33.5%after being steamed in 100%water vapor for 2 h.