Functionalization of large-pore mesoporous silicas with organosilanes by direct synthesis

2004 ◽  
Vol 72 (1-3) ◽  
pp. 33-42 ◽  
Author(s):  
A.S Maria Chong ◽  
X.S Zhao ◽  
Angeline T Kustedjo ◽  
S.Z Qiao
Keyword(s):  
Direct Synthesis ◽  
Mesoporous Silicas ◽  
Large Pore

Preparation, characterization and catalytic behavior in methanol decomposition of nanosized iron oxide particles within large pore ordered mesoporous silicas

2006 ◽  
Vol 89 (1-3) ◽  
pp. 209-218 ◽  
Author(s):  
Tanya Tsoncheva ◽  
Jessica Rosenholm ◽  
Cilâine V. Teixeira ◽  
Momtchil Dimitrov ◽  
Mika Linden ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Methanol Decomposition ◽  
Mesoporous Silicas ◽  
Iron Oxide Particles ◽  
Catalytic Behavior ◽  
Large Pore ◽  
Ordered Mesoporous ◽  
Oxide Particles ◽  
Nanosized Iron

Direct synthesis, characterization and solid-state NMR spectroscopy of large-pore vinyl-functionalized cubic mesoporous silica FDU-12

2006 ◽  
Vol 97 (1-3) ◽  
pp. 9-20 ◽  
Author(s):  
Hsien-Ming Kao ◽  
Pai-Ching Chang ◽  
Jyun-Da Wu ◽  
Anthony S.T. Chiang ◽  
Chiou-Hwang Lee
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Mesoporous Silica ◽  
Solid State Nmr ◽  
Direct Synthesis ◽  
Solid State Nmr Spectroscopy ◽  
Large Pore ◽  
Cubic Mesoporous

Mesoporous Silicas Impregnated with Cobalt and Nickel Oxide Nanoparticles and the Growth of Carbon Nanotubes There from

2008 ◽  
Vol 8 (7) ◽  
pp. 3333-3342
Author(s):  
D. Barreca ◽  
W. J. Blau ◽  
F. C. Dillon ◽  
J. D. Holmes ◽  
C. Kufazvinei ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Direct Synthesis ◽  
Chemical Vapour ◽  
Growth Conditions ◽  
Significant Loss ◽  
Mesoporous Silicas ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles

Metal oxide-based nanoparticles of cobalt or nickel were deposited inside the pores and on the surface of hexagonal mesoporous silicas by a direct synthesis technique using Pluronic P85 and P123 surfactants as structure directing agents with the appropriate metal phthalocyanine as a metal precursor. Metal loadings were between 0.4–3.2 wt.%. XPS studies showed that the initial form of the metal oxide nanoparticles were [CoO] and [NiO] respectively. Samples of these materials formed from the P85 surfactant and 3.0 wt.% were used to grow carbon nanotubes (CNTs) from acetylene feedstock in a catalytic chemical vapour deposition (CCVD) reactor at 800 °C. CNT growth appeared to be random and the CNTs had diameters ranging from <10 to >90 nm. Treatment of the metal impregnated silicas with nitric acid produced materials which, under the same CNT growth conditions, afforded more uniform CNTs with diameters between 5–15 nm. No significant loss in mesophase ordering was seen in the TEM, PXRD or nitrogen physisorption analysis of the acid washed samples. CNTs grown with cobalt impregnated silicas formed with the P123 surfactant had diameters in the range 15–25 nm. Raman spectroscopy of the CNT products showed the nanotubes were highly graphitised and of good quality.

STRUCTURAL INVESTIGATION OF ORDERED MESOPOROUS SILICAS FUNCTIONALIZED BY DIRECT SYNTHESIS WITH CYCLAM DERIVATIVES

2008 ◽  
Author(s):  
FABRICE GASLAIN ◽  
ANNE-CATHERINE FAUST ◽  
CLAIRE MARICHAL ◽  
BENEDICTE LEBEAU ◽  
YOANN ROUSSELIN ◽  
...  
Keyword(s):  
Structural Investigation ◽  
Direct Synthesis ◽  
Mesoporous Silicas ◽  
Ordered Mesoporous

Organotin compounds immobilized on mesoporous silicas as heterogeneous catalysts for direct synthesis of dimethyl carbonate from methanol and carbon dioxide

2010 ◽  
Vol 372 (1) ◽  
pp. 94-102 ◽  
Author(s):  
Binbin Fan ◽  
Hongyu Li ◽  
Weibin Fan ◽  
Jilong Zhang ◽  
Ruifeng Li
Keyword(s):  
Carbon Dioxide ◽  
Heterogeneous Catalysts ◽  
Dimethyl Carbonate ◽  
Direct Synthesis ◽  
Mesoporous Silicas ◽  
Organotin Compounds

Direct Synthesis and Catalytic Reactivity of Highly Ordered Large-Pore Methylaminopropyl-Functionalized SBA-15 Materials

2005 ◽  
Vol 58 (7) ◽  
pp. 507 ◽  
Author(s):  
Xueguang Wang ◽  
Soofin Cheng
Keyword(s):  
Catalytic Activity ◽  
Inorganic Salt ◽  
Direct Synthesis ◽  
Initial Mixture ◽  
Tetraethyl Orthosilicate ◽  
High Catalytic Activity ◽  
Amino Groups ◽  
Large Pore ◽  
Catalytic Reactivity ◽  
First Time

Highly ordered large-pore SBA-15 materials functionalized with a high loading of amino groups were synthesized for the first time by co-condensation of tetraethyl orthosilicate (TEOS) and [3-(methylamino)propyl]trimethoxysilane (MAPTMS) using an amphiphilic block copolymer. Addition of inorganic salt to the initial mixture greatly enhanced the mesostructure ordering and stability of the mesoporous materials. The materials thus obtained showed high catalytic activity and selectivity for the synthesis of flavanones by means of the Claisen–Schmidt condensation in the absence of solvent.

Direct synthesis of hydrothermally stable micro–mesoporous silicas templated by unsaturated α-linolenic acid self-assemblies under high temperature hydrothermal conditions

2011 ◽  
Vol 142 (2-3) ◽  
pp. 585-591 ◽  
Author(s):  
Haiming Nan ◽  
Qiang Cai ◽  
Qianyao Sun ◽  
Juanjuan Qi ◽  
Yushan Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Linolenic Acid ◽  
Direct Synthesis ◽  
Mesoporous Silicas ◽  
Hydrothermal Conditions
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