Showing papers in "Microporous and Mesoporous Materials in 2005"

TL;DR: In this paper, a review of the preparation of ordered mesoporous catalysts is presented, and the essential properties of the resulting materials are described in the first part of this review.

TL;DR: An account of the mechanistic aspects of hydrothermal zeolite synthesis can be found in this paper, where a review of the most probable mechanistic pathways in Zeolite formation is given.

TL;DR: Aminosilane-modified SBA-15 was prepared by grafting various aminosilanes on mesoporous silica and its adsorption characteristics towards carbon dioxide were examined as discussed by the authors.

TL;DR: In this paper, the authors used infrared spectroscopic techniques to acquire a deeper understanding of mid-range order in the alkaline aluminosilicate (zeolite precursor) formed in the activation of fly ash.

TL;DR: In this paper, the effects of activation time and activation temperature on porosity of the prepared carbons were studied, and the produced carbons are characterized by N 2 adsorption at 77 K, using the BET, α s and Dubinin-Radushkevich methods.

TL;DR: In this paper, the structure, ibuprofen (IBU) drug storage capacities and release rates of hollow mesoporous silica spheres with cubic pore network (HMSC) were investigated.

TL;DR: In this article, the effect of different heating mechanisms on the porous network of activated carbons (AC) previously exhausted with phenol has been studied using two experimental devices: a single mode microwave device operating at 2450 MHz and a conventional electric furnace.

TL;DR: In this paper, two quadratic models were developed for BET surface area and yield of activated carbon using Design-Expert software, and the models were used to calculate the optimum operating conditions for production of activation carbon providing a compromise between BET surface areas and yield.

TL;DR: In this paper, the combination of dealumination and desilication of ZSM-5 zeolites has been investigated in order to decouple mesoporosity creation and modification of acidity.

TL;DR: In this paper, a metakaolinite reaction with NaOH solutions of different concentrations in autoclaves at 105°C for 2.5h has been investigated and the reaction product was found to be essentially Zeolite NaA with the NaOH solution of 4.N.

TL;DR: Recent findings support zeolites role in the prevention of certain metabolic diseases in dairy cows, as well as their shifting effect on nitrogen excretion from urine to faeces in monogastric animals, which results in lower aerial ammonia concentration in the confinement facilities.

TL;DR: Hollow mesoporous silica spheres with uniform size and morphology have been successfully synthesized in a facile route using PVP and CTAB as co-templates at room temperature as mentioned in this paper.

TL;DR: In this article, the pore properties including the surface area, pore volume, and pore size distribution of carbonized pistachio shells were characterized by the t -plot method based on N 2 adsorption isotherms.

TL;DR: In this article, the specific activity of α-amylase in ordered mesoporous silicas for hydrolysis of starch has been studied, and it was observed that the thermal and pH stability of the immobilized enzyme is higher compared to free α-AMylase.

TL;DR: An overview of today's use of zeolites and related microporous materials as catalysts within the fields of refining, petrochemistry and commodity chemicals can be found in this paper.

TL;DR: In this paper, a simple direct hydrothermal method was used to synthesize Fe-SBA-15 materials under weak acidic conditions, and the powder X-ray diffraction (XRD), N2 sorption and transmission electron microscopy (TEM) characterizations showed that the resultant materials have well-ordered hexagonal meso-structures.

TL;DR: In this paper, small angle X-ray scattering (SAXS) reveals the presence of submicroscopic clusters both in the resorcinol-formaldehyde (RF) gels and in the carbon gels, whose size, of the order of tens of nanometres, is consistent with SEM observations.

TL;DR: Mesoporous cerium dioxide has been synthesized using the ordered mesoporous silica KIT-6 as hard template, and a series of different amounts of CuO have been modified to this CeO2 replica by wet impregnation.

TL;DR: In this paper, carbon was synthesized from zirconium carbide, ZrC 0.98, in a chlorine environment in the temperature range of 200-1200°C.

TL;DR: Aluminum-containing mesoporous molecular sieves AISBA-15 with different n(Si)/n(Al), ratios and AIMCM-41 have been synthesized hydrothermally and characterized in detail by physicochemical methods, viz. XRD, N-2 adsorption and Al-27 NMR spectroscopy as discussed by the authors.

TL;DR: In this paper, the effect of 3-aminopropyltriethoxysilane (3-APT) on the electrokinetic properties of the treated sepiolite samples has been investigated by following the zeta potential of the particles as a function of pH.

TL;DR: In this article, the electrokinetic properties of kaolinite have been investigated using the microelectrophoresis technique as a function of solid-liquid ratio, pH and type and concentration of electrolyte.

TL;DR: In this paper, a co-precipitation method was used to synthesize hydrotalcite-like compounds with molar ratios of Mg/Al ranging from 2.1 to 3.6.

TL;DR: In this article, a combination of UV-VIS-NIR spectra, IR spectra of skeletal vibrations and of adsorbed NO, as well as voltammetry provided information on the type of Fe species introduced.

TL;DR: In this paper, a mesoporous SBA-15 silica molecular sieves with internal channels uniformly lined with aminopropyl groups have been prepared via incipient-wetness impregnation of (3-aminoproyl)triethoxysilane in dry toluene at 100°C, and characterized thoroughly by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption, thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR),

TL;DR: In this paper, a method of elimination of uremic toxins such as urea, uric acid, creatinine, p-cresol and indoxyl sulfate from solutions by adsorption onto zeolites is introduced.

TL;DR: In this paper, the assembling mode of transition metal oxides and metallic guest phases embedded in nanotubular pores of ordered mesostructured silicas (OMS) hosts was evaluated based on N2 adsorption-desorption data.

TL;DR: The microporous silica framework of RUB-24 is derived from topotactic condensation of the silicate layers of the crystalline precurser R-RUB-18 as mentioned in this paper, which is a new small pore zeolite with a one-dimensional pore system consisting of straight and non-intersecting 8-ring channels.

TL;DR: In this article, the water vapor adsorption properties of the clinoptilolite rich zeolite tuff, from Bigadic (Turkey), and its modified forms were examined.

TL;DR: In this paper, the effect of modification with cobalt via aqueous impregnation on the structure of MCM-41 and SBA-15 materials was studied using X-ray diffraction (XRD) at low scattering angles and low-temperature nitrogen adsorption.