Journal
CRYSTAL GROWTH & DESIGN
Volume 14, Issue 8, Pages 3857-3863Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cg500382w
Keywords
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Funding
- National Natural Science Foundation of China [21076107]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Research and Innovation Program for College Postgraduates of Jiangsu Province [CXLX13_428]
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We herein report novel hollow SAPO-34 cubes with a hierarchical internal structure. They are prepared from dry gels containing gelatin by a vapor-phase transport method. Microscopic characterization reveals that the cubes are constructed by symmetrically packed four two-top-point truncated octahedrons encapsulated by dense crystalline shells, exhibiting a structure-in-structure formation. The cubes show either +-shaped or the butterfly like X-shaped black spots on their faces under light. Investigation of the formation process of the hollow SAPO-34 cubes demonstrates a surface to core crystal growth route, which has not been found in vapor-phase transport synthesis of zeolites. A possible formation mechanism is proposed.
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