Results 241 to 250 of about 37,643 (291)

Incorporation of porphyrins into mesopores of MCM-41

Journal of Colloid and Interface Science, 2005
To introduce porphyrins such as the alcoholic-hydroxyl-group-appended free base porphyrin derivative (HP) of 5-[4-(3-hydroxylpropyloxycabonyl)phenyl]-10,15,20-triphenylphorphine into mesopores of MCM-41, samples were treated with 0-4.0 mmol dm-3 HP toluene solutions and the materials obtained were characterized by various means. The framework structure
Hidekazu, Tanaka, Tomomi, Usui, Shinichiro, Sugiyama, Shingo, Horibe, Hideo, Shiratori, Ryozi, Hino   +5 more
openaire   +2 more sources

The adsorption aspect of Cu2+ and Zn2+ on MCM-41 and SDS-modified MCM-41

Inorganic Chemistry Communications, 2014
Abstract To determine the interaction mechanism for heavy metal adsorption on functionalized MCM-41 mesoporous silica, both macroscopic and microscopic investigation was performed in this study. Hybrid sorbent material has been developed by modifying MCM-41 with sodiumdodecylsulphate (SDS), named as SDS-MCM-41, and tested for capturing Cu 2 + and Zn
Suwimol Wongsakulphasatch, Worapon Kiatkittipong, Janekit Saiswat, Bovornlak Oonkhanond, Alberto Striolo, Suttichai Assabumrungrat   +5 more
openaire   +1 more source

Catalytic Epoxidation of Cyclohexane on MCM-41 and Ti-MCM-41

2003
Mesoporous type MCM-41 and Ti-MCM-41 have been prepared and characterised by XRD, surface area and porosity evaluation and TEM. The solids were essayed as catalysts for the epoxidation of cyclohexane at two different temperatures. Only the samples containing Ti were active in the reaction being the most active the sample that was silylated.
G. Pecchi, P. Reyes, G. Borda, M. Oportus   +3 more
openaire   +1 more source

Synthesis and characterization of MCM-41 with different methods and adsorption of Sr2+ on MCM-41

Research on Chemical Intermediates, 2013
Mesoporous silica MCM-41 was prepared by classical and ultrasound methods as an adsorbent for the removal of Sr2+ from aqueous solution. The physical properties of the synthesized materials were investigated by X-ray diffraction and Brunauer-Emmett-Teller analysis.
Yilmaz, Müge, Piskin, Sabriye, Ozdemir, Ozgul Dere   +2 more
openaire   +2 more sources

Characterization of hydrothermally treated MCM-41 and Ti-MCM-41 molecular sieves

Catalysis Today, 2004
In this work we report the characterization and results of hydrothermal treatment tests performed on MCM-41 and Ti-MCM-41 materials at two temperatures, 450 and 550 °C. Based on BET analyses and XRD measurements, results showed a decrease in specific surface area, pore volume and pore size for both materials after the hydrothermal treatments.
P. Schacht, L. Noreña-Franco, J. Ancheyta, S. Ramírez, I. Hernández-Pérez, L.A. García   +5 more
openaire   +1 more source

Study by TG–MS of the oxidation of SH-MCM-41 to SO3H-MCM-41

Thermochimica Acta, 2004
Abstract Functionalised SH-MCM-41 materials have been prepared via grafting and co-condensation. A detailed thermogravimetric–mass spectrometry (TG–MS) study of SH-MCM-41 and the correspondent acid form SO3H-MCM-41 materials has been carried out. The influence of the oxidation procedure in the final sulphur species is described.
Isabel Dı́az, Federico Mohino, Joaquı́n Pérez-Pariente, Enrique Sastre   +3 more
openaire   +1 more source

Morphological Control of MCM‐41 by Pseudomorphic Synthesis.

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
T, Martin, A, Galarneau, F, Di Renzo, F, Fajula, D, Plee   +4 more
openaire   +2 more sources

Cu–H-MCM-41, H-MCM-41 and Na-MCM-41 Mesoporous Molecular Sieve Catalysts for Isomerization of 1-Butene to Isobutene

Catalysis Letters, 2002
Cu–H-MCM-41, H-MCM-41 and Na-MCM-41 mesoporous molecular sieve catalysts were synthesized, characterized and investigated in the isomerization of 1-butene to isobutene. Introduction of copper in MCM-41 was found to play a positive role in enhancing the conversion of 1-butene and yield of isobutene and Cu–H-MCM-41 exhibited higher conversion of 1-butene
Narendra Kumar, Ville Nieminen, Lars Eric Lindfors, Tapio Salmi, Dmitry Yu. Murzin, Ensio Laine, Teemu Heikkilä   +6 more
openaire   +1 more source

MCM-41 deposition on alumina ceramic foams

Materials Letters, 2010
Alumina-based macro-porous ceramic foams were successfully coated with MCM-41 meso-porous materials using an in-situ one step hydrothermal synthesis. Low H2O/NaOH ratio in the starting mixture leads to a not uniform deposition of the meso-porous materials.
GRANATO T, LE PIANE F, TESTA, Flaviano, KATOVIC, Andrea, AIELLO R.   +4 more
openaire   +3 more sources

Toluene hydrogenation over nickel-containing MCM-41 and Ti-MCM-41 materials

Journal of Porous Materials, 2009
Nickel-containing MCM-41 and Ti-MCM-41 mesoporous materials with different amounts of nickel were prepared by one-pot, sol–gel synthesis. The properties of the nickel catalysts were studied by means of X-ray diffraction (XRD), N2 physisorption, UV-Vis spectroscopy and temperature programmed reduction (TPR) methods. The catalysts have been tested in the
Ágnes Szegedi, Margarita Popova
openaire   +1 more source