Direct Hydrothermal Synthesis of Iron-Containing Mesoporous Silica SBA-15: Potential as a Support for Gold Nanoparticles

	Direct Hydrothermal Synthesis of Iron-Containing Mesoporous Silica SBA-15: Potential as a Support for Gold Nanoparticles
	Li, Ying 2; Guan, Yejun 1; van Santen, Rutger A.1; Kooyman, Patricia J.3; Dugulan, Iulian 4; Li, Can 5; Hensen, Emiel J. M.1
刊名	journal of physical chemistry c
	2009-12-31
卷号	113 期号:52 页码:21831-21839
通讯作者	emiel j. m. hensen
产权排序	5;6
英文摘要	the preparation of mesoporous silica sba-15 with high iron loadings (14-90 wt % fe(2)o(3)) as a suitable support for gold nanoparticles to be used in co oxidation catalysis has been investigated. the support materials were prepared by a direct hydrothermal two-step ph adjusting method which consisted of the formation of the silica mesophase at low ph and the inclusion of fe(3+) at varying ph in the range 2-7. the materials were characterized by xrd, sem, and tem/edx, n(2) porosimetry, and (57)fe mossbauer spectroscopy. at relatively low fe loading, the sba-15 structure is maintained and iron is predominantly surface grafted to the silica surface. such a mesoporous silica can accommodate up to 40 wt % fe(2)o(3) with a surface area of 460 m(2)/g, with increasing fe content, precipitation of iron hydroxides competes with the surface grafting process and the resulting materials are all intimate mixture of hematite particles embedded in an fe/sba-15 matrix. a too high fe(3+) content in the synthesis gel results in a high rate of precipitation and impedes the formation of the silica mesophase. the stabilization of the rnesophase at ph 7 is proposed to involve interactions of the surfactant with a surface grafted fe(3+) silica phase. the use of an sba-15 which contains mainly surface grafted fe(3+) as a support for gold nanoparticles results in a more active catalyst for co oxidation than gold supported by sba-15 or iron oxide particles.
WOS标题词	science & technology ; physical sciences ; technology
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]	catalytic-properties ; oxide nanoparticles ; crystalline walls ; co oxidation ; gamma-fe2o3 ; temperature ; gel ; adsorption ; systems ; matrix
收录类别	SCI
原文出处	false
语种	英语
WOS记录号	WOS:000272936400051
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/103003]
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.Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands 2.Zhejiang Univ Technol, Inst Catalysis, Zhejiang Key Lab Green Chem Synth Technol, Hangzhou 310014, Zhejiang, Peoples R China 3.Delft Univ Technol, DCT TNW, NL-2628 BL Delft, Netherlands 4.Delft Univ Technol, R3 Reactor Inst, NL-2628 BL Delft, Netherlands 5.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China
推荐引用方式 GB/T 7714	Li, Ying,Guan, Yejun,van Santen, Rutger A.,et al. Direct Hydrothermal Synthesis of Iron-Containing Mesoporous Silica SBA-15: Potential as a Support for Gold Nanoparticles[J]. journal of physical chemistry c,2009,113(52):21831-21839.
APA	Li, Ying.,Guan, Yejun.,van Santen, Rutger A..,Kooyman, Patricia J..,Dugulan, Iulian.,...&Hensen, Emiel J. M..(2009).Direct Hydrothermal Synthesis of Iron-Containing Mesoporous Silica SBA-15: Potential as a Support for Gold Nanoparticles.journal of physical chemistry c,113(52),21831-21839.
MLA	Li, Ying,et al."Direct Hydrothermal Synthesis of Iron-Containing Mesoporous Silica SBA-15: Potential as a Support for Gold Nanoparticles".journal of physical chemistry c 113.52(2009):21831-21839.