Mesopore size and surface area calculations for hexagonal mesophases (types MCM-41, FSM-16, etc.) using low-angle XRD and adsorption data

Фенелонов, В. Б.; Romannikov, V. N.; Derevyankin, A.Yu.

doi:10.1016/s1387-1811(98)00280-7

Cited by 127 publications

(43 citation statements)

References 33 publications

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“…1b), characteristic of anatase titania was observed around 2q ¼ 25 for TiMCM-41 sample which also confirms that Ti is in anatase form only in nanochannels [24]. Using the d 100 value of 42.8 Å and 43.7 Å for TiMCM-41 and MCM-41, the pore diameter of 4.35 nm is obtained for TiMCM-41 (surface area ¼ 861 m 2 /g) and 4.56 nm for unmodified MCM-41 (surface area ¼ 1029 m 2 /g) sample using Fenelonov et al's [25] pore diameter determination procedure.…”

Section: Preparation Of the Photocatalystmentioning

confidence: 63%

Photocatalytic effects of titania supported nanoporous MCM-41 on degradation of methyl orange in the presence of electron acceptors

Anandan

2008

Dyes and Pigments

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Section: Preparation Of the Photocatalystmentioning

confidence: 63%

Photocatalytic effects of titania supported nanoporous MCM-41 on degradation of methyl orange in the presence of electron acceptors

Anandan

2008

Dyes and Pigments

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“…The catalysts were degassed at 250 • C for 12 h up to a residual pressure <10 -1 Pa before the measurements. Textural characteristics were calculated using a conventional method reported elsewhere [91]. XRD measurements were performed on an X-ray diffractometer Bruker D8 Advance (Bruker, Karlsruhe, Germany) using copper radiation (Cu Kα-1.5418 Å) in the 2θ scanning range of 10-70 • .…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Synergetic Effect of Ni2P/SiO2 and γ-Al2O3 Physical Mixture in Hydrodeoxygenation of Methyl Palmitate

et al. 2017

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Abstract:The Ni 2 P/SiO 2 catalyst, which was prepared by in situ temperature-programmed reduction and in the mixture with the inert (SiC, SiO 2 ) or acidic (γ-Al 2 O 3 ) material was studied in methyl palmitate hydrodeoxygenation (HDO). Methyl palmitate HDO was carried out at temperatures of 270-330 • C, H 2 /feed volume ratio of 600 Nm 3 /m 3 , and H 2 pressure of 3.0 MPa. Ni 2 P/SiO 2 catalyst, diluted with γ-Al 2 O 3 showed a higher activity than Ni 2 P/SiO 2 catalyst diluted with SiC or SiO 2 . The conversion of methyl palmitate increased significantly in the presence of γ-Al 2 O 3 most probably due to the acceleration of the acid-catalyzed reaction of ester hydrolysis. The synergism of Ni 2 P/SiO 2 and γ-Al 2 O 3 in methyl palmitate HDO can be explained by the cooperation of the metal sites of Ni 2 P/SiO 2 and the acid sites of γ-Al 2 O 3 in consecutive metal-catalyzed and acid-catalyzed reactions of HDO. The obtained results let us conclude that the balancing of metal and acid sites plays an important role in the development of the efficient catalyst for the HDO of fatty acid esters over supported phosphide catalysts.

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“…The layered silicate used was kanemite and the resulting material, the FSM-16 solid, presented a regular structure with channel type mesopores [40][41][42]. Structurally, FSM-16 material has some similarity to the well known MCM-41 solid [43,44] but, apparently, with higher structural stability [42].…”

Section: Introductionmentioning

confidence: 99%

Enantioselective Epoxidation of Alkenes by Jacobsen Catalyst Anchored onto Aminopropyl-functionalised Laponite, MCM-41 and FSM-16

et al. 2008

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The Jacobsen catalyst derivative, (R,R)-[Mn(3,5-dtButsalhd)]ClO 4 -CAT 2, was immobilized through axial coordination of the metal center onto a Laponite, MCM-41 and FSM-16 functionalized with 3-aminopropyltriethoxysilane. The catalytic activity of the Mn-based materials was screened for the enantioselective epoxidation of three olefins: styrene, a-methylstyrene and 6-CN-2,2 0 -dimethychromene, using m-CPBA/NMO as oxidant, and the results were compared with the corresponding homogenous complex (CAT 2) and with the Jacobsen's catalyst, (R,R)-[Mn(3,5-dtButsalhd)Cl]-CAT 1.The results indicate that under comparable condition, the Laponite-based materials show both, higher epoxide yield and enantiomeric excess (ee%) compared to MCM-41 and FSM-16-based materials. The best ee% value was obtained for the substrate 6-CN-2,2 0 -dimethylchromene (64%) which is very close to that obtained with CAT 2 (67%) in homogeneous phase; for the two regular mesoporous materials (MCM-41 and FSM-16) the catalytic results were more favorable for the FSM-16 samples.

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Mesopore size and surface area calculations for hexagonal mesophases (types MCM-41, FSM-16, etc.) using low-angle XRD and adsorption data

Cited by 127 publications

References 33 publications

Photocatalytic effects of titania supported nanoporous MCM-41 on degradation of methyl orange in the presence of electron acceptors

Photocatalytic effects of titania supported nanoporous MCM-41 on degradation of methyl orange in the presence of electron acceptors

Synergetic Effect of Ni2P/SiO2 and γ-Al2O3 Physical Mixture in Hydrodeoxygenation of Methyl Palmitate

Enantioselective Epoxidation of Alkenes by Jacobsen Catalyst Anchored onto Aminopropyl-functionalised Laponite, MCM-41 and FSM-16

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