Hollow nanocrystals of silicoaluminophosphate molecular sieves synthesized by an aminothermal co-templating strategy

doi:10.1039/c5ce01798j

	Hollow nanocrystals of silicoaluminophosphate molecular sieves synthesized by an aminothermal co-templating strategy
	Wang, Dehua 1,2; Yang, Miao 1; Zhang, Wenna 1,2; Fan, Dong 1,2; Tian, Peng 1; Liu, Zhongmin 1
刊名	CRYSTENGCOMM
	2016
卷号	18 期号:6 页码:1000-1008
ISSN号	1466-8033
DOI	10.1039/c5ce01798j
文献子类	Article
英文摘要	An aminothermal co-templating strategy has been developed to explore the synthesis of SAPO molecular sieves. Nanosized SAPO-56 (AFX) with a hollow morphology is, for the first time, obtained by utilizing triethylamine (TEA) and trimethylamine (TMA) as both the solvent and the template in the presence of HF. The prepared material is well characterized, and the coexistence of TEA and TMA in the crystals is proved by C-13 NMR. Molecular modelling indicates that the most stable status for the as-made SAPO-56 is 2TEA per aft cage and 1TMA per gme cage in the AFX structure, which is consistent with the TG results and verifies the co-templating behaviour of the two amines. In addition, the aminothermal crystallization process of SAPO-56 is examined, revealing an interesting in situ phase transformation from SAPO-34 (only containing TEA) to nano SAPO-56 followed by a further in situ post-synthetic leaching to achieve the hollow structure. Both F- anions and organic amines are proposed to be responsible for the dissolution of SAPO-34 and the etching of SAPO-56 nanocrystals. The Si-rich outer layer with abundant Si coordination environments (more Si-O-Al bonds and less Al-O-P bonds) helps the shell of SAPO-56 survive the leaching. This work offers an effective way to prepare SAPO-56 nanocrystals and demonstrates the huge potential of the aminothermal co-templating route for new material synthesis.
WOS关键词	IN-SITU TRANSFORMATION ; IONOTHERMAL SYNTHESIS ; LESS DENSE ; MACROPOROUS MONOLITHS ; SILICON DISTRIBUTION ; ALKALINE TREATMENT ; RATIONAL SYNTHESIS ; ZEOLITE ; SAPO-34 ; ALUMINOPHOSPHATES
WOS研究方向	Chemistry ; Crystallography
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000369609800019
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/171372]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Tian, Peng; Liu, Zhongmin
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olefins, Dalian Natl Lab Clean Energy, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Dehua,Yang, Miao,Zhang, Wenna,et al. Hollow nanocrystals of silicoaluminophosphate molecular sieves synthesized by an aminothermal co-templating strategy[J]. CRYSTENGCOMM,2016,18(6):1000-1008.
APA	Wang, Dehua,Yang, Miao,Zhang, Wenna,Fan, Dong,Tian, Peng,&Liu, Zhongmin.(2016).Hollow nanocrystals of silicoaluminophosphate molecular sieves synthesized by an aminothermal co-templating strategy.CRYSTENGCOMM,18(6),1000-1008.
MLA	Wang, Dehua,et al."Hollow nanocrystals of silicoaluminophosphate molecular sieves synthesized by an aminothermal co-templating strategy".CRYSTENGCOMM 18.6(2016):1000-1008.