Structure and Basicity of Microporous Titanosilicate ETS-10 and Vanadium-Containing ETS-10

	Structure and Basicity of Microporous Titanosilicate ETS-10 and Vanadium-Containing ETS-10
	Guo, Meiling 1,2; Pidko, Evgeny A.3; Fan, Fengtao 1; Feng, Zhaochi 1; Hofmann, Jan P.4; Weckhuysen, Bert M.4; Hensen, Emiel J. M.3; Li, Can 1
刊名	journal of physical chemistry c
	2012-08-16
卷号	116 期号:32 页码:17124-17133
通讯作者	emieljmhensen ; 李灿
产权排序	1,1
英文摘要	ets-10 has attracted considerable attention as a base catalyst. it is desirable to confirm the location of basic sites. vanadium-substituted ets-10 also attracts much attention for the interesting feature that the ti can be fully replaced by v without changing its topology. it is important to characterize the local environment upon v substitution for understanding the property and reactivity of etvs-10. the structural and acid-base properties of pure titanosilicate ets-10 and a series of vanadium-substituted etvs-10 with different framework v content were studied by a combination of raman spectroscopy and ftir of absorbed acetylene and carbon monoxide as molecular probes. the substitution of up to 70% of ti atoms with v in the structure of ets-10 results in etvs-10 materials with a homogeneous distribution of ti and v species. at higher v concentrations, a distinct phase separation between the vanadium-rich domains is observed. the intrinsic basicity of etvs-10 as revealed by ftir spectroscopy of adsorbed c2h2 gradually increases with the increasing v content. it is shown that the specific basicity of the ets-10 lattice is mainly associated with the presence of highly basic oxygen centers adjacent to the lattice defects. liquid phase knoevenagel condensation of benzaldehyde with ethyl cyanoacetate was used as a test reaction to investigate the catalytic reactivity of different basic sites in the synthesized materials. the reactivity of the materials considered in the base-catalyzed knoevenagel condensation is determined not only by the strength of the basic sites but also by their density. the optimum combination of both factors is achieved for the etvs-10 material with v/(ti+v) ratio of 70%.
学科主题	物理化学
类目[WOS]	chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	adsorbed probe molecules ; substituted ets-10 ; base catalysts ; quantum wires ; zeolites ; condensation ; sites ; spectroscopy ; oxides
收录类别	SCI
语种	英语
WOS记录号	WOS:000307494600039
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/118255]
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
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Dalian 116023, Peoples R China 3.Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands 4.Univ Utrecht, Debye Inst NanoMat Sci, NL-3584 CG Utrecht, Netherlands
推荐引用方式 GB/T 7714	Guo, Meiling,Pidko, Evgeny A.,Fan, Fengtao,et al. Structure and Basicity of Microporous Titanosilicate ETS-10 and Vanadium-Containing ETS-10[J]. journal of physical chemistry c,2012,116(32):17124-17133.
APA	Guo, Meiling.,Pidko, Evgeny A..,Fan, Fengtao.,Feng, Zhaochi.,Hofmann, Jan P..,...&Li, Can.(2012).Structure and Basicity of Microporous Titanosilicate ETS-10 and Vanadium-Containing ETS-10.journal of physical chemistry c,116(32),17124-17133.
MLA	Guo, Meiling,et al."Structure and Basicity of Microporous Titanosilicate ETS-10 and Vanadium-Containing ETS-10".journal of physical chemistry c 116.32(2012):17124-17133.