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UV Raman Spectroscopic Studies on the Mechanism of FeAlPO4-5 Synthesis
Guo Qiang1,2; Fan Fengtao1; Guo Meiling1,2; Feng Zhaochi1; Li Can1
关键词Iron Alpo4-5 Zeolite Uv Raman Spectroscopy Resonance Raman Effect Synthesis Mechanism
刊名CHINESE JOURNAL OF CATALYSIS
2012
DOI10.1016/S1872-2067(10)60281-1
33期:1页:106-113
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]SELECTIVE OXIDATION ; MOLECULAR-SIEVES ; ACTIVE-SITES ; CRYSTALLIZATION MECHANISM ; N2O DECOMPOSITION ; NITROUS-OXIDE ; TS-1 ZEOLITE ; CATALYSTS ; FRAMEWORK ; TITANIUM
英文摘要FeAlPO4-5 samples with various iron contents were investigated by UV resonance Raman spectroscopy and UV-Vis spectroscopy. The Raman spectra of FeAlPO4-5 show four feature bands related to the framework iron at 630, 1060, 1140, and 1210 cm(-1) when excited by 266 nm laser. It is found that only part of ferric ions could enter into the framework, while the others exist in the extra-framework in the form of six-coordinated state. This kind of iron gives characteristic Raman band at 285 cm(-1). Combined with UV resonance Raman spectroscopy, UV-Vis spectroscopy, and X-ray diffraction, the crystallization process of FeAlPO4-5 (Al/Fe = 760) was studied. It is found that, in the early stages of the crystallization, the iron species exist in the form of six-coordinated state while attached to the end of the 1-dimensional AlPO4 chain. The Fe-O bonds in the six-coordinated state hamper the crystallization of AlPO4. The crystallization of the FeAlPO4-5 began when the reaction between the 1-dimensional AlPO4 chains occurred. At the same time, the six-coordinated ferric ions converted to the tetrahedral iron.
语种英语
WOS记录号WOS:000300474100011
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/138022
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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Guo Qiang,Fan Fengtao,Guo Meiling,et al. UV Raman Spectroscopic Studies on the Mechanism of FeAlPO4-5 Synthesis[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(1):106-113.
APA Guo Qiang,Fan Fengtao,Guo Meiling,Feng Zhaochi,&Li Can.(2012).UV Raman Spectroscopic Studies on the Mechanism of FeAlPO4-5 Synthesis.CHINESE JOURNAL OF CATALYSIS,33(1),106-113.
MLA Guo Qiang,et al."UV Raman Spectroscopic Studies on the Mechanism of FeAlPO4-5 Synthesis".CHINESE JOURNAL OF CATALYSIS 33.1(2012):106-113.
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