Synthesis of self-assembled functional molecules in mesoporous materials

1996 ◽  
Vol 457 ◽  
Author(s):  
Itaru Honma ◽  
H. Sasabe ◽  
H-S. Zhou
Keyword(s):  
Mesoporous Materials ◽  
Simple Procedure ◽  
Mesoporous Structure ◽  
Self Assembled

ABSTRACTSelf-assembled functional molecules in mesoporous materials are synthesized directly either by co-assembly of dye-bound surfactant of ferrocenyl TMA with silicate or Pc (phthalocyanine) molecules doped in the C16TMA micelles with oxides framework such as V2O5, MoO3, WO3 and SiO2. The process provides well-organized molecular dopoed mesoporous structure by direct and simple procedure.

Preparation and Characterization of Ti-SBA-15 Mesoporous Materials with Varying Si/Ti Molar Ratios

2012 ◽  
Vol 482-484 ◽  
pp. 985-988
Author(s):  
Qiu Ying Huang ◽  
Wei Liu ◽  
Wen Hao Ye ◽  
Xiu Cheng Zheng
Keyword(s):  
Mesoporous Materials ◽  
Hydrothermal Process ◽  
Catalytic Efficiency ◽  
Mesoporous Structure ◽  
Catalytic Performance ◽  
Reaction Conditions ◽  
Molar Ratios ◽  
Good Catalytic Activity ◽  
Epoxidation Of Cyclohexene

Ti-SBA-15 mesoporous materials with different Si/Ti molar ratios were synthesized via a hydrothermal process and characterized by using various techniques. The effect of Si/Ti molar ratios in the gels on the structure and catalytic efficiency in epoxidation of cyclohexene was discussed in details. The results showed that all the Ti-SBA-15 materials retained SBA-15 mesoporous structure and exhibited good catalytic activity. Furthermore,the sample prepared with Si/Ti =50 exhibited the best catalytic performance under the reaction conditions.

Nitrogen Loss and Structural Change of Nitrogen-incorporated SBA-15 Mesoporous Materials Under Different Treatment Conditions

2005 ◽  
Vol 20 (9) ◽  
pp. 2296-2301 ◽  
Author(s):  
Jiacheng Wang ◽  
Qian Liu
Keyword(s):  
High Temperature ◽  
Structural Change ◽  
Mesoporous Materials ◽  
Nitrogen Loss ◽  
Mesoporous Structure ◽  
Silicon Oxynitride ◽  
Mesoporous Silicon ◽  
Treatment Conditions ◽  
Before And After ◽  
Hydrolysis Of

Work on nitrogen loss and structural change of nitrogen-containing SBA-15 mesoporous materials after heat treatment in air or water treatment is described herein. The nitrogen-containing SBA-15 lost nitrogen after being treated in air at high temperature or in water, the mesoporous structure of which was very well maintained and did not collapse. HRTEM, N2 sorption, powder XRD, and SEM were used to study the structural ordering and morphology of the mesoporous silicon oxynitride materials before and after treatment. FTIR and C/N/H elemental analysis confirmed that nitrogen loss occurred after the mesoporous silicon oxynitride material was treated. Nitrogen was lost via hydrolysis of ammonium groups when mesoporous silicon oxynitride material was treated in water and by being substituted by oxygen from air when it was heated in air at high temperature.

scholarly journals Structural Characterisation and Mechanical Stability of Titanium Substituted Mesoporous Materials

2010 ◽  
Vol 636-637 ◽  
pp. 136-141
Author(s):  
Cristina Galacho ◽  
Manuela M.L. Ribeiro Carrott ◽  
Joana Valerio ◽  
Peter J.M. Carrott ◽  
J.M. Valente Nabais
Keyword(s):  
Mesoporous Materials ◽  
Mechanical Stability ◽  
Nitrogen Adsorption ◽  
Mesoporous Structure ◽  
External Pressure ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Structural Characterisation

Mesoporous silica and titanium SBA-15 samples with different Si/Ti molar ratio were prepared by direct one-step synthesis under strongly acidic hydrothermal conditions. The materials were characterised by X-ray diffraction, nitrogen adsorption at 77K. The Si/Ti values of the final calcined materials were determined by ICP analysis. It was found that all samples presented 2-D hexagonal structures with high degree of ordering. However, the metal content incorporated in all titanium mesoporous materials was very low, i.e., the Si/Ti molar ratio values of the final calcined samples are significantly different from the initial Si/Ti molar ratio in the synthesis gel. A study of mechanical stability in air was performed by exposing the calcined samples to a unidirectional external pressure in the range 74-814MPa. X-ray diffraction and nitrogen adsorption at 77K, on selected compacted samples, were used in order to evaluate the changes in mesoporous structure. It was found that, for all freshly calcined pure silica and titanium containing samples tested, the high quality SBA-15 structure is still observed after the application 148-370MPa of a unidirectional external pressure and the collapse of the pore structure occurs at around 814MPa.

Preparation and Characterization of Silica-Based Mesoporous Materials

2011 ◽  
Vol 396-398 ◽  
pp. 463-467
Author(s):  
Xiao Hui Zhang ◽  
Qi Guang Cao ◽  
Guo Li Xie
Keyword(s):  
Hydrochloric Acid ◽  
Pore Size ◽  
Mesoporous Materials ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Mesoporous Structure ◽  
Ammonium Bromide ◽  
Pore Sizes ◽  
Silica Source ◽  
Cetyl Trimethyl Ammonium

The silica-based mesoporous materials were synthesized under normal atmospheric with Cetyl trimethyl ammonium bromide(CTAB) as surfactant, TEOS as silica source and hydrochloric acid as activator. The pore sizes distribution of mesoporous materials were adjusted by organic assistant reagent TMB(1,3,5-three toluol).The materials after and before TMB addition were characterized through XRD and IR. The results showed that the materials have regular hexagonal mesoporous structure. The structure is more regular and pore size is more bigger after TMB added.

The Preparation of Aniline Formaldehyde Condensate-Mesoporous Materials Compound and the Application in Adsorption of Zn(II) and Pb(II) in Aqueous Solution

2013 ◽  
Vol 781-784 ◽  
pp. 2229-2232 ◽  
Author(s):  
Yan Liu ◽  
Ze Yang Zhu ◽  
Xiang Guo Meng ◽  
Hai Xu Yin ◽  
Min Jia Meng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Mesoporous Materials ◽  
Mesoporous Structure ◽  
Ordered Mesoporous Materials ◽  
Ordered Mesoporous ◽  
Ft Ir ◽  
Adsorption Desorption ◽  
Scanning Electron

The amine aldehydes resin-mesoporous materials complex AFC-SBA-15 was synthesized using ordered mesoporous materials SBA-15 as the carrier. The obtained compound was characterized by FT-IR,N2adsorption-desorption and scanning electron microscopy. The compound retained ordered mesoporous structure and the resin polymer coated inside channels and outside surface hole wall. The adsorption behavior was carried out with the presence of EDTA in binary components of Pb (II) and Zn (II). The result showed that with the presence of EDTA, tunable selectivity could be realized.

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