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nb-mcm-41 (15) 15
chemistry, physical (12) 12
catalysis (7) 7
epoxidation (6) 6
molecular-sieves (6) 6
silica (6) 6
catalysts (5) 5
niobium (5) 5
engineering, chemical (4) 4
heterogeneous catalysis (4) 4
mcm-41 (4) 4
mesoporous molecular-sieves (4) 4
acidity (3) 3
aluminum (3) 3
cis-cyclooctene (3) 3
niobium oxide catalysts (3) 3
oxidation (3) 3
raman spectroscopy (3) 3
al-mcm-41 (2) 2
alkenes (2) 2
beckmann rearrangement (2) 2
beckmann rearrangement reaction (2) 2
caprolactam (2) 2
catalytic activity (2) 2
catalytic-activity (2) 2
chemical synthesis (2) 2
chemistry (2) 2
containing mcm-41 (2) 2
conversion (2) 2
cyclohexanone (2) 2
cyclohexanone oxime (2) 2
dehydrogenation (2) 2
epsilon-caprolactam (2) 2
ftir (2) 2
gas phase reaction (2) 2
heterogene katalyse (2) 2
hydrogen forms (2) 2
hydrogen peroxide (2) 2
industrial chemistry/chemical engineering (2) 2
k ei chemistry, physical (2) 2
molecular sieves (2) 2
niob (2) 2
oxalates (2) 2
oxide (2) 2
oxide catalysts (2) 2
pharmacy (2) 2
phase oxidation (2) 2
physical chemistry (2) 2
selectivity (2) 2
sieves (2) 2
silicate (2) 2
sites (2) 2
synthesis (2) 2
test reactions (2) 2
ti-mcm-41 (2) 2
zeolites (2) 2
zeolith (2) 2
ɛ-caprolactam (2) 2
ε-caprolactam (2) 2
acetylene (1) 1
acetylene decomposition (1) 1
adsorption (1) 1
air oxidation (1) 1
alkene (1) 1
ammonium (1) 1
ammonium-ion (1) 1
ammoximation (1) 1
analysis (1) 1
beckmann-umlagerung (1) 1
butylation (1) 1
catalyst (1) 1
catalytic-properties (1) 1
ceramics (1) 1
chemische reaktion (1) 1
chemistry, inorganic & nuclear (1) 1
columbium (1) 1
cumene (1) 1
cvd synthesis (1) 1
cyclization (1) 1
cyclohexanon (1) 1
cyclohexanoneoxime (1) 1
cyclooctene (1) 1
decomposition (1) 1
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equilibrium adsorption method (1) 1
ethanol (1) 1
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evaporation-induced self-assembly (1) 1
excitation spectra (1) 1
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Journal of Catalysis, ISSN 0021-9517, 10/2001, Volume 203, Issue 1, pp. 18 - 24
The molecular structures of Nb cations in mesoporous material NbMCM-41 and the supported Nb2O5/SiO2 catalyst under hydrated and dehydrated conditions were... 
methanol oxidation | Nb2O5/SiO2 | Raman spectroscopy | catalysts | NbMCM-41 | UV-visible diffuse reflectance spectroscopy | SiO | Nb-MCM-41 | Catalysts | Methanol oxidation | OXIDATION | VANADIUM-OXIDE | MECHANISM | MESOPOROUS MOLECULAR-SIEVES | CHEMISTRY, PHYSICAL | MCM-41 | NIOBIUM OXIDE CATALYSTS | SPECTROSCOPY | TEMPERATURE | EQUILIBRIUM ADSORPTION METHOD | SILICA
Journal Article
Journal of Catalysis, ISSN 0021-9517, 12/2015, Volume 332, pp. 138 - 148
[Display omitted] •Hydrothermally stable mesoporous niobium-silicates were prepared by evaporation-induced self-assembly.•The nature of niobium precursor... 
Epoxidation | Heterogeneous catalysis | Mesoporous niobium-silicate | Alkene | Hydrogen peroxide | Evaporation-induced self-assembly | CHEMISTRY, PHYSICAL | SURFACTANT MESOSTRUCTURED MATERIALS | OXIDE CATALYSTS | ENGINEERING, CHEMICAL | FIBERS | ALKENES | NIOBOSILICATES | FILMS | NB-MCM-41 | OLEFINS | HYDROGEN-PEROXIDE
Journal Article
ChemPhysChem, ISSN 1439-4235, 12/2017, Volume 18, Issue 23, pp. 3325 - 3328
It was found that bands at 739, 963, and 1107 cm−1 in the resonant Raman spectra are characteristics of framework penta‐coordinated NbV−OH species, and that a... 
UV resonance Raman spectroscopy | zeolites | framework niobium | UV/Vis spectroscopy | trace analysis | UV | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | CHEMISTRY, PHYSICAL | MOLECULAR-SIEVES | NB-MCM-41 | CYCLOHEXANONE | SITES | Vis spectroscopy | CATALYTIC-ACTIVITY | SILICATE | BECKMANN REARRANGEMENT | Raman spectroscopy | Zeolites | Analysis
Journal Article
Journal of Catalysis, ISSN 0021-9517, 11/2008, Volume 260, Issue 1, pp. 17 - 29
The niobium incorporated MCM-41 molecular sieves (Si/Nb-16, 32, 64 and 128) have been synthesized by hydrothermal method using tetradecyltrimethyl ammonium... 
ε-Caprolactam | Gas phase reaction | Nb-MCM-41 | Beckmann rearrangement reaction | Cyclohexanone oxime | NIOBIUM | SILICALITE-1 | epsilon-Caprolactam | MESOPOROUS MOLECULAR-SIEVES | PERFORMANCE | CHEMISTRY, PHYSICAL | TI-MCM-41 | ENGINEERING, CHEMICAL | SITES | ZEOLITES | INTERMEDIATE | FINE | PHASE OXIDATION
Journal Article
Applied Catalysis B: Environmental, ISSN 0926-3373, 04/2015, Volume 165, pp. 87 - 93
•Caprolactam was synthesized via one-step liquid phase ammoximation and Beckmann rearrangement over Nb-MCM-41 catalysts.•The influence of temperature,... 
Cyclohexanoneoxime | Ammoximation | Nb-MCM-41 | ɛ-Caprolactam | Cyclohexanone | Beckmann rearrangement | ε-Caprolactam | NIOBIUM | OXIDE | epsilon-Caprolactam | SELF-CONDENSATION | REACTIVITY | CHEMISTRY, PHYSICAL | RAMAN | ENGINEERING, CHEMICAL | KETONES | ENGINEERING, ENVIRONMENTAL | OXIME | Heterogeneous catalysis | Reduction | Catalysts | Ethanol | Caprolactam | Ethyl alcohol | Silicon | Catalysis | Niobium
Journal Article
Journal of Catalysis, ISSN 0021-9517, 2006, Volume 243, Issue 1, pp. 57 - 63
Well-ordered [Nb]-MCM-41 was synthesized at room temperature with essentially all niobium present in the sample substituted into the silica framework. The... 
Epoxidation | Nb-MCM-41 | Cis-cyclooctene | Hexamethyldisilazane | Silylation | cis-cyclooctene | OXIDATION | BUTYLATION | OXIDE | MESOPOROUS MOLECULAR-SIEVES | CHEMISTRY, PHYSICAL | MCM-41 | ENGINEERING, CHEMICAL | hexamethyldisilazane | ALKENES | epoxidation | silylation | SILICA | CATALYTIC-ACTIVITY | ACIDITY | Adsorption | Hydrogen peroxide
Journal Article
Applied catalysis. A, General, ISSN 0926-860X, 2004, Volume 266, Issue 2, pp. 223 - 227
Ti-MCM-41 and Nb-MCM-41 synthesized at room temperature are efficient catalysts for the cyclooctene epoxidation with tert-butyl hydroperoxide. The result is... 
Epoxidation | Nb-MCM-41 | Cyclooctene | Ti-MCM-41 | tert-Butyl hydroperoxide | SELECTIVE OXIDATION | tert-butyl hydroperoxide | PERFORMANCE | cyclooctene | CHEMISTRY, PHYSICAL | MOLECULAR-SIEVES | MCM-41 | CATALYST | NIOBIUM OXIDE | ENVIRONMENTAL SCIENCES | epoxidation | SILICA
Journal Article
Journal of Non-Crystalline Solids, ISSN 0022-3093, 03/2008, Volume 354, Issue 15-16, pp. 1648 - 1653
[Nb]-MCM-41 was synthesized at room temperature by varying the base (tetramethylammonium hydroxide or ammonium hydroxide), the silica source (tetraethyl... 
X-ray diffraction | Transition metals | Catalysis | Ceramics | ceramics | NB-MCM-41 | CONTAINING MCM-41 | MATERIALS SCIENCE, MULTIDISCIPLINARY | transition metals | catalysis | MOLECULAR-SIEVES | MATERIALS SCIENCE, CERAMICS | EPOXIDATION | Hydroxides | Oxalates | Oxalic acid | Silica | Telomerase
Journal Article
Journal of Catalysis, ISSN 0021-9517, 11/2008, Volume 260, Issue 1, pp. 17 - 29
The niobium incorporated MCM-41 molecular sieves (Si/Nb-16, 32, 64 and 128) have been synthesized by hydrothermal method using tetradecyltrimethyl ammonium... 
Gas phase reaction | Nb-MCM-41 | Beckmann rearrangement reaction | ɛ-Caprolactam | Cyclohexanone oxime | Heterogeneous catalysis | Nuclear magnetic resonance spectroscopy | Pyridine | Catalysts
Journal Article
Studies in Surface Science and Catalysis, ISSN 0167-2991, 2004, Volume 154, pp. 2945 - 2950
Journal Article
Catalysis Letters, ISSN 1011-372X, 1997, Volume 45, Issue 1-2, pp. 259 - 265
Journal Article
Catalysis Communications, ISSN 1566-7367, 2007, Volume 8, Issue 11, pp. 1665 - 1670
Mesoporous Mo MCM-41 and Nb MCM-41 molecular sieves were synthesized in various ratios by hydrothermal method and were characterized by XRD, N 2 adsorption... 
Acetylene decomposition | SWNT | Mo and Nb MCM-41 | acetylene decomposition | ACETYLENE | CVD SYNTHESIS | DECOMPOSITION | CHEMISTRY, PHYSICAL | LARGE-SCALE SYNTHESIS | Microbiological synthesis | Knowledge-based systems | Raman spectroscopy | Growth | Nanotechnology | Nanotubes
Journal Article
Catalysis Letters, ISSN 1011-372X, 2/2005, Volume 99, Issue 3, pp. 141 - 150
Journal Article
2004, ISBN 0444518258, Volume 154
An efficient and simple method for preparing Nb-MCM-41 has been developed. The mesoporous material Nb-MCM-41 was synthesized at room temperature using... 
Nb-MCM-41, epoxidation, cis-cyclooctene
Book Chapter
Catalysis Letters, ISSN 1011-372X, 5/1997, Volume 45, Issue 3, pp. 259 - 265
The acidity of Nb-MCM-41 molecular sieves as well as their hydrogen forms was studied using FTIR spectroscopy with pyridine and 2,6-dimethylpyridine as probe... 
Chemistry | Catalysis | Industrial Chemistry/Chemical Engineering | Physical Chemistry | Pharmacy | test reactions | Nb-MCM-41 | NIOBIUM OXIDE CATALYSTS | HYDROXYL-GROUPS | Y-ZEOLITES | acidity | Al-MCM-41 | FTIR | CHEMISTRY, PHYSICAL | hydrogen forms | MOLECULAR-SIEVES | K EI CHEMISTRY, PHYSICAL | Lewis acid | Aluminum | Decomposition reactions | Cumene | Sieves | Molecular sieves | Niobium
Journal Article
Zeolites, ISSN 0144-2449, 1997, Volume 18, Issue 5, pp. 356 - 360
A mesoporous niobium-containing silicate of the MCM-41 type was prepared for the first time, according to our knowledge. Structure, mechanical stability,... 
synthesis | Nb-MCM-41 | mechanical stability | catalytic activity | structure | Catalytic activity | Synthesis | Mechanical stability | Structure | ALUMINUM | DEHYDROGENATION | MESOPOROUS MOLECULAR-SIEVES | CHEMISTRY, PHYSICAL | K EI CHEMISTRY, PHYSICAL | OXIDE CATALYSTS
Journal Article
2004, STUDIES IN SURFACE SCIENCE AND CATALYSIS, Volume 154, 6
An efficient and simple method for preparing Nb-MCM-41 has been developed. The mesoporous material Nb-MCM-41 was synthesized at room temperature using... 
cis-cyclooctene | MOLYBDENUM | STABILITY | CHEMISTRY, PHYSICAL | MOLECULAR-SIEVES | MESOPOROUS MATERIALS | Nb-MCM-41 | NIOBIUM OXIDE CATALYSTS | DEHYDROGENATION | epoxidation | CONTAINING MCM-41 | SILICA | SELECTIVITY
Book Chapter
by Jiang, SY and Zhou, CL and Kong, Y and Wang, CQ and Li, J and Wang, J
CHINESE JOURNAL OF INORGANIC CHEMISTRY, ISSN 1001-4861, 12/2005, Volume 21, Issue 12, pp. 1831 - 1837
A series of bimetallic Zn-Sn modified MCM-41 with different amounts of tin and zinc were synthesized by direct hydrothermal method using sodium metasilicate... 
SOLID ACID CATALYSTS | PORE-SIZE | PERFORMANCE | HYDROXYLATION | MCM-41 | MOLECULAR-SIEVES | CHEMISTRY, INORGANIC & NUCLEAR | zinc/tin | NB | SURFACE | SILICA | PHASE OXIDATION | CYCLIZATION
Journal Article
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