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Nanolamellar Fe3O4as magnetic adsorbents was prepared using sodium dodecyl sulfonate as a template. Thermogravimetric measurements characterisation showed that the as-synthesised product contained about 6 wt% sodium dodecyl sulfonate. The adsorption performance of nanolamellar Fe3O4for the removal of organic dye from aqueous solution was evaluated using methylene blue as a model dye. The product exhibited an excellent ability to adsorb methylene blue from aqueous solutions with a maximum methylene blue removal rate of 96.8%. The adsorption kinetics can be described by a pseudo-second-order equation, and the adsorption isotherm agreed well with Langmuir adsorption equation. Furthermore, the dye saturated nanolamellar Fe3O4could be regenerated using acidic ethanol solution, and the nanolamellar Fe3O4showed excellent reusability. The results indicate the potential use of the adsorbent for the removal of methylene blue from aqueous solution. [ABSTRACT FROM AUTHOR]

Highlights: [•] 2D nanolamellar Fe3O4 (magnetite) (NLM) was synthesized by template method. [•] NLM exhibited a superparamagnetic characteristic. [•] 8 reflection loss peaks could be found from composite with 50wt.% NLM. [•] The lowest reflectivity was −46.6dB obtained from composite with 75wt.% NLM. [ABSTRACT FROM AUTHOR]

Abstract: The MFI/MCM-41 composite material with bimetallic Fe and Co incorporation was prepared using templating method via a two-step hydrothermal crystallization procedure. The obtained products were characterized by a series of techniques including powder X-ray diffraction, N2 sorption, transmission electron microscopy, scanning electron microscope, H2 temperature programmed reduction, thermal analyses, and X-ray absorption fine structure spectroscopy of the Fe and Co K-edge. The catalytic properties of the products were investigated by residual oil hydrocracking reactions. Characterization results showed that the FeCo-MFI/MCM-41 composite simultaneously possessed two kinds of stable meso- and micro-porous structures. Iron and cobalt ions were incorporated into the silicon framework, which was confirmed by H2 temperature programmed reduction and X-ray absorption fine structure spectroscopy. This composite presented excellent activities in hydrocracking of residual oil, which was superior to the pure materials of silicate-1/MCM-41. [Copyright &y& Elsevier]

Abstract: A method of incorporating iron onto the mesoporous silica network using potassium ferricyanide (K3Fe (CN)6) as the iron source was established. The Fe (CN)6 3+ ions interact with the template and attached onto the silica network after the as-synthesized sample calcined at 823K. FT-IR spectroscopy provided a clear evidence for the interaction between cyanide ligands and template. XANES spectroscopic displayed that the Fe3+ changed from octahedral to tetrahedral coordinated during thermal treatment. XRD and HRTEM results indicated that the iron ions incorporated onto the silica network without destroying the lattice structure of the parent MCM-41. The synthesized material exhibited a good activity for phenol hydroxylation. [Copyright &y& Elsevier]

Highlights: [•] The ionic complex [(C4H9)4N]2 +[M(EDTA)]2− is used as the template. [•] The content of the transitional metal in samples is up to 10–15wt%. [•] Iron and cobalt are introduced into zeolites framework. [•] Nickel and cooper are interacted with interface of pore channels. [Copyright &y& Elsevier]

Abstract: The novel rich heteroatom-containing (15wt.%) composite molecular sieves M1-MFI/M2-MCM-41 have been prepared from the ionic complex [M1(EDTA)]2− and [M2(EDTA)]2− as the organic templates, which could effectively introduce a large amount of heteroatoms into the framework of molecular sieves. The products were characterized by XRD, XRF, SEM, HRTEM, N2 adsorption–desorption, H2-TPR, FT-IR, TG and DSC techniques. The catalytic performances of the composite materials were investigated by means of residual oil hydrocracking. Characterization results showed that the composite materials simultaneously possessed a typical orthogonal MFI phase and a hexagonal MCM-41 phase and the two phases were composite rather than the physical mixture. H2-TPR data indicated all of the heteroatoms were incorporated by isomorphous substitution of silicon in framework. N2 adsorption–desorption analysis exhibited that these samples possessed regular and stable structure with high specific surface area and large pore diameters of 550–620 m2 g−1, 3.5nm and 5.5nm, respectively. M1-MFI/M2-MCM-41 presented excellent activities in hydrocracking of residual oil, which were superior to the pure materials of MFI/MCM-41. [Copyright &y& Elsevier]

Abstract: Facile synthesis of titanium containing silica-pillared clay derivatives with ordered mesoporous structure from a novel intra-gallery templating route is successfully established. The ordered mesoporous titanium containing silica-pillared clay materials obtained by a surfactant-directed assembly of silica species in the interlayer space of natural montmorillonite, are characterized by a mesoporous structure with uniform pores (2.7nm) between the layers. These results indicate that surfactant plays a decisive role in pore formation, because it acts as a micelle-like template during the hydrolysis of organic precursor. The main titanium species was tetrahedrally coordinated in the gallery silica framework. The increase of Ti content leads to a gradual reduction of quality of pore structure and of the pore volumes. Up to a Ti loading corresponding to Si/Ti=20 the titanium is mainly tetracoordinated and the highest conversions of cyclohexene with anhydrous tert-butylhydroperoxide are obtained, with excellent selectivity for the epoxide. However, a further increase of Ti content to Si/Ti of 10 and 5, leads to an undesirable decrease of conversion and selectivity. [Copyright &y& Elsevier]