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学科主题: 物理化学
题名: An acid-free route for the facile synthesis of iron-functionalized mesoporous silicas: Transformation between hollow nanospheres and cage-like mesostructures
作者: Xin, Hongchuan1, 2;  Zhao, Jiao1;  Li, Xiaobo1;  Tang, Jianting1;  Yang, Qihua1
通讯作者: 杨启华
关键词: Acid-free ;  Iron ;  Mesoporous ;  Hollow nanospheres ;  FDU-12
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2014-05-15
DOI: 10.1016/j.micromeso.2014.01.019
卷: 190, 期:1, 页:54-62
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 ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Iron-substituted silicas with hollow nanospherical morphology and cage-like mesostructure have been synthesized using triblock copolymer F127 as surfactant and tetramethoxysilane (TMOS) as silica source with no necessary addition of mineral acids. Iron-functionalized hollow nanospheres were obtained using Fe(acac)(3) as iron source. When Fe(NO3)(3) was employed as iron source, iron-containing cage-like FDU-12 mesostructure and hollow nanospheres were formed with Fe/Si molar ratio lower than 0.008 and higher than 0.015, respectively. The formation of hollow spheres at high Fe/Si ratio can be regarded as gradually dissociation of nanocages from Fe-FDU-12. The structure of the iron centers was determined by spectroscopic methods (UV-vis and UV-Raman measurements) and by elemental analyses. The facile structural evolution between cage-like and nanospherical structures may be helpful for further understanding the formation mechanism of mesoporous silicas. (C) 2014 Elsevier Inc. All rights reserved.
关键词[WOS]: RESONANCE RAMAN-SPECTROSCOPY ;  BUFFER SOLUTION ;  HETEROGENEOUS CATALYSTS ;  ASYMMETRIC CATALYSIS ;  SELECTIVE OXIDATION ;  TEMPLATING APPROACH ;  NEUTRAL CONDITIONS ;  DRUG-DELIVERY ;  NITROUS-OXIDE ;  ACTIVE-SITES
语种: 英语
WOS记录号: WOS:000335102500008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144218
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China

Recommended Citation:
Xin, Hongchuan,Zhao, Jiao,Li, Xiaobo,et al. An acid-free route for the facile synthesis of iron-functionalized mesoporous silicas: Transformation between hollow nanospheres and cage-like mesostructures[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2014,190(1):54-62.
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