Structure analysis of mesoporous material ‘FSM-16’ Studies by electron microscopy and X-ray diffraction

Sakamoto, Yasuhiro; Inagaki, Shinji; Ohsuna, Tetsu; Ohnishi, Norio; Fukushima, Yoshiaki; Nozue, Yasuo; Terasaki, Osamu

doi:10.1016/s1387-1811(98)00053-5

Cited by 52 publications

(34 citation statements)

References 6 publications

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“…One possible explanation for the lower surface areas and pore volumes is that the pore walls of the Fe-FSM-16 samples prepared by M-H synthesis are thicker than the FSM-16 samples prepared by conventional-hydrothermal synthesis reported in the literature [3,4]. The X-ray powder diffraction patterns of the solids prepared by M-H synthesis showed three peaks indexed as (100), (110) and (200) reflections in the range of 2h = 2°-5°, which correspond to the wellordered hexagonal mesoporous structure.…”

Section: Xrd N 2 Adsorption Isotherms and Chemical Analysismentioning

confidence: 96%

“…The 57 Fe Mössbauer spectra of the samples were recorded between 298 and 4.2 K using a 2-GBq 57 Co/Rh source and a conventional constant acceleration spectrometer operated in triangular mode. Spectra at temperatures below 4.2 K were obtained in a 3 He- 4 He dilution refrigerator and in-field spectra with a superconducting coil. The applied magnetic field (H) was parallel to the c-ray direction of propagation.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…Folded sheet mesoporous materials (FSM-16) have gained much attention because of their high specific surface areas and pore volumes [1][2][3][4]. The formation mechanism of the FSM-16 materials has been studied in detail by Chen et al [5].…”

Section: Introductionmentioning

confidence: 99%

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Catalytic performance of iron-mesoporous nanomaterials synthesized by a microwave-hydrothermal process

Bachari

Guerroudj

Lamouchi

2010

Reac Kinet Mech Cat

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The liquid-phase benzylation of aromatic compounds with benzyl chloride (BC) has been investigated over a series of iron-FSM-16 materials with different Si/Fe ratios (Si/Fe = 90, 60, and 10) synthesized by a microwavehydrothermal (M-H) process and characterized by several spectroscopic techniques such as N 2 adsorption measurements, X-ray diffraction, electron spin resonance (ESR) and Mössbauer spectroscopy. Catalytic data in the benzylation of aromatic compounds such as benzene and toluene with BC show that Fe-FSM-16 samples synthesized by the M-H process are very active and recyclable catalysts. The kinetics of benzene benzylation over this catalyst has been thoroughly investigated.

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Section: Xrd N 2 Adsorption Isotherms and Chemical Analysismentioning

confidence: 96%

Section: Characterization Techniquesmentioning

confidence: 99%

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Catalytic performance of iron-mesoporous nanomaterials synthesized by a microwave-hydrothermal process

Bachari

Guerroudj

Lamouchi

2010

Reac Kinet Mech Cat

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“…Sakamoto et al concluded that FSM-16 and MCM-41 are structurally different. [88] By their detailed TEM observation of a 2D hexagonal product recovered in the initial stage of the formation of FSM-16, they stated that the 2D hexagonal phase may also be formed through fragmentation of the silicate sheets of kanemite. However, the presence of a layered intermediate and the fragmentation of the silicate sheets had not been detected by any experimental data at that time.…”

Section: On the Difference Between Fsm-16 And Mcm-41mentioning

confidence: 99%

Ordered Mesoporous Silica Derived from Layered Silicates

Kimura

Kuroda

2009

Adv Funct Materials

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Here, the development of ordered mesoporous silica prepared by the reaction of layered silicates with organoammonium surfactants is reviewed. The specific features of mesoporous silica are discussed with relation to the probable formation mechanisms. The recent understanding of the unusual structural changes from the 2D structure to periodic 3D mesostructures is presented. The formation of mesophase silicates from layered silicates with single silicate sheets depends on combined factors including the reactivity of layered silicates, the presence of layered intermediates, the variation of the silicate sheets, and the assemblies of surfactant molecules in the interlayer spaces. FSM‐16‐type (p6mm) mesoporous silica is formed via layered intermediates composed of fragmented silicate sheets and alkyltrimethylammonium (CnTMA) cations. KSW‐2‐type (c2mm) mesoporous silica can be prepared through the bending of the individual silicate sheets with intralayer and interlayer condensation. Although the structure of the silicate sheets changes during the reactions with CnTMA cations in a complex manner, the structural units caused by kanemite in the frameworks are retained. Recent development of the structural design in the silicate framework is very important for obtaining KSW‐2‐based mesoporous silica with molecularly ordered frameworks. The structural units originating from layered silicates are chemically designed and structurally stabilized by direct silylation of as‐synthesized KSW‐2. Some proposed applications using these mesoporous silica are also summarized with some remarks on the uniqueness of the use of layered silicates by comparison with MCM‐type mesoporous silica.

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“…However, the technique encounters difficulty in the analysis of pillared clay in which the pore structure is not cylindrical nor slit-like. Electron microscopy is known to a powerful tool for analysis of zeolite pores (6,7). A few studies of pillared clays have been carried out (8), but it is difficult to observe pillars shielded by silicate layers.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Pore Structure Formed in a Pillared Montmorillonite Interlayer Using Adsorption Methods and a Carbonization Technique

Yamazaki

Nakamura

Ozawa

2001

Journal of Colloid and Interface Science

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Structure analysis of mesoporous material ‘FSM-16’ Studies by electron microscopy and X-ray diffraction

Cited by 52 publications

References 6 publications

Catalytic performance of iron-mesoporous nanomaterials synthesized by a microwave-hydrothermal process

Catalytic performance of iron-mesoporous nanomaterials synthesized by a microwave-hydrothermal process

Ordered Mesoporous Silica Derived from Layered Silicates

Investigation on Pore Structure Formed in a Pillared Montmorillonite Interlayer Using Adsorption Methods and a Carbonization Technique

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