分子筛包埋金属纳米颗粒制备方法探讨

Insight Into the Preparation of Metal Nanoparticles Encapsulated Zeolites

纳米催化是化学与化工领域研究的热点,在石油化工、精细化学品合成、环境保护和资源高效利用等领域发挥了重要作用。但是金属纳米催化剂普遍存在高温团聚问题,而将金属纳米颗粒包埋在分子筛晶内,不仅可有效提高抗烧结性能,还可同时获得孔道择形、限域催化和协同效应等优势。详细介绍了直接合成法和后合成法制备分子筛包埋金属催化剂的基本思路、关键科学问题和性能效果,以期对理性设计金属纳米颗粒和分子筛复合催化材料提供借鉴和指导。

Nano catalysis is an important research topic in the field of chemistry research and chemical industry,of great importance especially in the areas of petrochemical industry,fine chemical synthesis,environmental protection and efficient utilization of resources,but it commonly suffers high-temperature sintering.To solve this problem,embedding metal nanoparticles in the molecular sieve crystal not only improves the sintering resistance,but also obtains the advantages of shape selectivity,confinement catalysis function and synergistic effect.In this paper,the basic concepts,key problems and performance effects of the in-situ synthesis and post synthesis methods for the preparation of zeolite embedded metal catalysts are introduced in detail,in order to provide reference and guidance for the rational design of metal nanoparticles and zeolite composite catalytic materials.