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UV-Raman and NMR Spectroscopic Studies on the Crystallization of Zeolite A and a New Synthetic Route
Ren, Limin3,4; Li, Caijin3,4; Fan, Fengtao1; Guo, Qiang1; Liang, Desheng3,4; Feng, Zhaochi1; Li, Can1; Li, Shougui3,4; Xiao, Feng-Shou2
KeywordCrystal Growth Uv-raman Spectroscopy Nmr Spectroscopy Synthesis Design Zeolites
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
2011-05-01
DOI10.1002/chem.201100098
Volume17Issue:22Pages:6162-6169
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordX-RAY-SCATTERING ; SITU SMALL-ANGLE ; MOLECULAR-SIEVE ; SYNTHESIS MECHANISM ; CRYSTAL-GROWTH ; NUCLEATION ; MICROSCOPY ; FRAMEWORK ; ION ; LTA
AbstractUV-Raman and NMR spectroscopy, combined with other techniques, have been used to characterize crystallization of zeolite A. In situ UV-Raman spectroscopy shows that the starting gel for crystallization of zeolite A contains a lot of four-ring (4R) building units and the appearance of six-ring (6R) building blocks is the signal for crystal formation. (29)Si NMR spectroscopy results suggest that the starting gel is double four-ring (D4R) rich and during crystallization of zeolite A both alpha and beta cages appear. (27)Al NMR spectroscopy results indicate the absence of Al (2Si) species in the starting gel, suggesting the absence of single 4R building units in the starting gel. Furthermore, composition analysis of both solid and liquid samples shows that the solid rather than liquid phase predominates for the crystallization of zeolite A. Therefore, it is proposed that the crystallization of zeolite A mainly occurs in the solid phase by self-assembly or rearrangement starting from the zeolite building units mainly consisting of D4R. The essential role of D4R is directly confirmed by successful conversion from a solution of D4R to zeolite A in the presence of NaCl, and the importance of solid phase is reasonably demonstrated by the successful synthesis of zeolite A from a dry aluminosilicate gel. By considering that the solid phase has a major contribution to crystallization, a novel route was designed to synthesizing zeolite A from the raw materials water glass (Na(2)SiO(3) in aqueous solution) and NaAlO(2), without additional water and NaOH; this route not only simplifies synthetic procedures, but reduces water consumption.
Language英语
WOS IDWOS:000291798700018
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142464
Collection中国科学院大连化学物理研究所
Affiliation1.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Zhejiang Univ, Dept Chem, Hangzhou 310028, Peoples R China
3.Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
4.Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130023, Peoples R China
Recommended Citation
GB/T 7714
Ren, Limin,Li, Caijin,Fan, Fengtao,et al. UV-Raman and NMR Spectroscopic Studies on the Crystallization of Zeolite A and a New Synthetic Route[J]. CHEMISTRY-A EUROPEAN JOURNAL,2011,17(22):6162-6169.
APA Ren, Limin.,Li, Caijin.,Fan, Fengtao.,Guo, Qiang.,Liang, Desheng.,...&Xiao, Feng-Shou.(2011).UV-Raman and NMR Spectroscopic Studies on the Crystallization of Zeolite A and a New Synthetic Route.CHEMISTRY-A EUROPEAN JOURNAL,17(22),6162-6169.
MLA Ren, Limin,et al."UV-Raman and NMR Spectroscopic Studies on the Crystallization of Zeolite A and a New Synthetic Route".CHEMISTRY-A EUROPEAN JOURNAL 17.22(2011):6162-6169.
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