Synthesis of methyl modified mesoporous silica MCM-41
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Abstract:
Modification of mesoporous molecular sieve MCM-41 with dimethyl dichlorosilane(DMCS) methyl is successfully grafted into the surface of MCM-41 mesoporous sieve.The organic-inorganic complex material CH_3-MCM-41 is synthesized, and its structure is characterized by elemental analysis and FT-IR.Keywords:
MCM-41
Dichlorosilane
Sieve (category theory)
Surface Modification
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Temperature-programmed reduction
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MCM-41
Surface Modification
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The mesoporous molecular sieves Al-MCM-41 is synthesized under hydrothermal condition using cetyl trimethyl ammonium bromide(CTAB) surfactants as template,tetraetylorthosilicate(TEOS)as silicic,sodium aluminate as aluminum source,according to the ratio of Si:Al =50:1.0.SO42-/Al-MCM-41 mesoporous molecular sieves was obtained with sulfuric acid by infusing.Al-MCM-41 and SO42-/Al-MCM-41 are characterized by power X-ray diffraction(XRD),nitrogen adsorption and Hammett measurements.
MCM-41
Ammonium bromide
Sodium aluminate
Hydrothermal Synthesis
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Using glycerol, glycol and water as solvent, cetyltrimethylammonium bromide (CTAB)as template, tetraethyl orthosilicate (TEOS) as silica source, ethylenediamine (EDA) as base source,mesoporous molecular sieve MCM-41 has been synthesized at room temperature, characterized by X-ray power diffraction and N2 adsorption. Compared with the samples synthesized by glycol and water, the samples synthesized by glycerol have larger pore diameter and high surface areas.Thus glycerol is an efficient solvent for preparing larger pore mesoporous MCM-41.
MCM-41
Ethylene diamine
Mesoporous organosilica
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MCM-41
Catalytic Oxidation
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MCM-41
Amorphous silica
Specific surface area
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Mesoporous stannosilicate molecular sieves with MCM-48 structure have been synthesized by hydrothermal method and characterized by elemental analysis, XRD, N2 adsorption, UV-Visible, and FTIR. The results show that Sn in the synthesis gel can be incorporated into the tetrahedral lattice site of mesoporous MCM-48. The prepared SnMCM-48 exhibits catalytic performance different from Sn/MCM-48 prepared by impregnation in phenol hydroxylation.
MCM-41
Hydroxylation
Hydrothermal Synthesis
Mesoporous organosilica
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The phenyl-functionalized MCM-48 material(C6H5-MCM-48) has been synthesized by the co-condensation of tetraethoxysilane and phenytrimethoxysiliane by using cetyltrimethylammonium bromide as templating agent under alkaline reaction conditions.The materials before and after functionalization are characterized by SAXRD,FT-IR,TGA and N2 adsorption-desorption.The results show that the MCM-48-type inorganic/organic composite with gyroid structure has been prepared and the material has narrow pore-size disrtribution,high surface area and large mesopore volume.
MCM-41
Gyroid
Surface Modification
Characterization
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MCM-41
Mesoporous organosilica
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Modification of mesoporous molecular sieve MCM-41 with dimethyl dichlorosilane,OctyltrimethOxysiIane and octadecyltrichlorosilane,the organic functional group was successfully grafted into the surfance of MCM-41 mesoporous sieve,the organic-inorganic complex material R-MCM-41 was synthesized and characterized by elemental analysis and FT-IR.The results of the characterization show that the organic functional group gets into the wall of the mesoporous MCM-41.
MCM-41
Octadecyltrichlorosilane
Dichlorosilane
Mesoporous organosilica
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