Showing papers in "Microporous and Mesoporous Materials in 2011"

TL;DR: A short review of the recent literature concerning the utilization of natural zeolites and their modified forms in the separation, binding and chemical stabilization of hazardous inorganic, organic and radioactive species in soils and aqueous systems is provided in this paper.

TL;DR: In this article, an amine functionalized material, MCM-41-NH2, exhibited a higher uptake of CO2 at very low pressures compared with the nongrafted material.

TL;DR: In this paper, an adsorption study of hexane and xylene isomers mixtures was addressed in a rigid zirconium terephthalate UiO-66 (UiO for University of Oslo) with octahedral and tetrahedral cavities of free diameter close to 1.1nm and 0.8nm, respectively.

TL;DR: In this article, the preparation of nano-sized H[Zn, Al]ZSM-5 zeolite by direct synthesis procedure and its application in the aromatization of methanol were studied.

TL;DR: In this paper, high-ordered mesoporous SBA-15 molecular sieves were successfully synthesized through direct-synthesis using non-ionic surfactants as structure directing agent under strong acidic conditions.

TL;DR: In this paper, high pressure adsorption phenomena are discussed for different gases on HKUST-1 (Cu 3 (BTC) 2, commercially available product Basolite TM C300).

TL;DR: In this paper, the authors describe the expansion of new materials in the microporous metal oxide world and then some of the boundary conditions which must be met in trying to scale them up.

TL;DR: In this article, a series of micro- and micro-mesoporous H-ZSM-5 zeolites with highly regular and, on the other side, a defective framework were prepared by synthesis and post-synthesis treatment, and their activity was investigated in transformation of methanol to low olefins, aromatics and paraffins.

TL;DR: An overview of zeolite and mesoporous materials technologies currently used commercially or tested at pilot and laboratory scale for the conversion of biomass to biofuels can be found in this paper.

TL;DR: In this article, conditions for the synthesis of scandium terephthalate frameworks Sc2L3, MIL-53(Sc) (Sc(OH)L) and MIL-88(Sc), Sc2BDC3, Sc3O(H2O)3,(NO3−)L″1.5, L″ = 3,3′,5,5′-azobenzenetetracarboxylate (ABTC), have been established.

TL;DR: In this paper, four transient experimental methods for the study of surface diffusion of gases and liquids in porous media are critically reviewed, based on the measurement of a physical quantity that is sensible to a change in the surface diffusivity so that experimental data can be used to extract a value of the surface diffusion.

TL;DR: In this paper, a nano-sized H-ZSM-5 ( ca. ∼65nm) was successfully prepared by mixing the mother gel under mild conditions before crystallization.

TL;DR: In this paper, the authors studied adsorption and dynamics of CO2, CH4, N2, H2 and binary mixtures thereof in the zeolitic imidazolate frameworks ZIF-2 to Zif-10, using computer simulations.

TL;DR: In this article, a one step synthesis of nanocrystalline zeolites ZSM-5 and Naβ from a single template system in high yield has been discovered, where the size of individual nanocrystals, as well as mesopore surface area and pore volume can be controlled by adjusting the pH of the reaction mixture, aswell as the hydrothermal treatment temperature and duration.

TL;DR: In this article, an expanded view of zeolites structures is presented in an integrated scheme based on various materials identified with MWW structure, which is shown that X-ray powder diffraction can be used to unequivocally identify various types of structures generated by different layer arrangements.

TL;DR: In this article, mesoporous alumina (MA450) with improved properties has been synthesized using biopolymer chitosan as a template and used for defluoridation of water.

TL;DR: In this paper, sulfonic acid-modified microporous hypercrosslinked polymers (SAM-HCPs) were used as a high-capacity adsorbent for toxic metal ions.

TL;DR: A detailed overview of the emerging possibilities of zeolite films, with an emphasis on applications at the microscale, can be found in this paper, where the authors discuss some of the most interesting applications of the material.

TL;DR: In this paper, Li cations were incorporated into MOFs by either chemical reduction or cation exchange, which significantly improved the CO2/CH4 selectivity, while the selectivity enhancement appeared to come from favorable displacement of catenated frameworks.

TL;DR: In this paper, the influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA types was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions.

TL;DR: In this paper, an organic-inorganic hybrid mesoporous material (Ph-MS) was synthesized by co-condensation of phenyltriethoxysilane and tetraethoxisilane.

TL;DR: In this paper, the effect of factors such as; particle size, temperature and pH on ammonium adsorption process was investigated, and it was concluded that the sepiolite and fly ash have potential of being used as a sorbent for removal of ammonium in wastewater treatments from Bleached Kraft Mills Effluent (BKME).

TL;DR: The history of zeolite discovery and its evolution from curiosity to a technological cornerstone has been discussed in this paper, where the authors try and offer a balanced, but necessarily selective and personal overview of the context and motivation behind many of the defining episodes in that transformation, up until the mid-1980s.

TL;DR: In this article, the mesoporous aluminas with ordered mesostructure and hierarchical porosity have been synthesized via a one-step process using aluminum iso-propoxide as an inorganic precursor, pluronic P123 as a template, hydrochloric acid and citric acid as pH adjustors, and 1,3,5-trimethylbenzene (TMB) as a swelling agent.

TL;DR: The extent of dealumination was function of the zeolite structure (mordenite, beta and ZSM-5) and the heating method used as mentioned in this paper. But the use of microwaves affected the surface and acidic properties of the resulting dealuminated samples.

TL;DR: Palygorskite is a clay mineral whose structure is crossed by nano-channels (0.64 × 0.37 nm) filled by H2O and exchangeable ions as mentioned in this paper.

TL;DR: In this paper, two polysilsesquioxanes, with an empirical formula (RSiO 1.5 ) n R = CH 3 (PMS) and CH 3 6 H 5 (PMPS), were pyrolyzed at 1200°C for 2 ¼h to form SiOC ceramics of variable composition.

TL;DR: In this article, a hierarchical mesostructured metal-organic frameworks (designated here as L-MOFs) were designed and synthesized using block copolymers (P123 and F127) as structure directing agents under solvothermal synthesis conditions.

TL;DR: In this article, a simple low-temperature method was used to synthesize a cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2).

TL;DR: In this paper, three samples containing grafted primary, secondary and tertiary monoamines (pMono, sMono and tMono) as well as a triamine-grafted material (TRI) with both primary and secondary amines were exposed to flowing air at 120°C for 30-40h.