Infrared Spectrum3/23/2021
The pressed wafers of the materials ( 5 mg cm 1 ) were placed in the vacuum cell and activated at 723 K for 2 h.Wenqin Pang, in Studies in Surface Science and Catalysis, 2007 2.1 Characterization IR spectra were recorded on a Nicolet Nexus 470 FT-IR spectrometer using KBr pellets and X-ray diffraction patterns were obtained with a Siemens D5005 diffractometer using Cu K radiation ( 0.15418 nm).The conductivity was determined by complex impedance spectroscopy using an M273 electrochemical impedance analyzer over the frequency range from 99.9 kHz to 12Hz at room temperature.
The compound was pressed at 20 MPa into a compact pellet with 10.00 mm in diameter. The conductivity was calculated as (1R) (LS), where L is the pellet thickness, and S is the area of the pellet. Infrared Spectrum Full Chapter URLView chapter Purchase book Read full chapter URL: Fluid Catalytic Cracking V Materials and Technological Innovations M.L. Occelli,. H. Eckert, in Studies in Surface Science and Catalysis, 2001 2.5 IR Analysis Infrared (IR) spectra were obtained using a Nicolet 3600 spectrometer. Two spectra were obtained from each sample before accepting the results as being representative of the zeolite sample under study. Spectra were acquired with a 2 cm 1 resolution (8192 data points) and apodized using the Happ-Genzel algorithm. The pyridine-loaded wafers were then heated (in vacuum) in the 200500 C temperature range. View chapter Purchase book Read full chapter URL: Nanoporous Materials III Graham M Gray, John N Hay, in Studies in Surface Science and Catalysis, 2002 2.2 Instrumentation Infra-red (IR) spectra of the polyviologens and the sol-gel hybrids (as KBr discs) were recorded on a Perkin-Elmer 1750 Fourier transform IR (FT-IR) spectrometer. H nuclear magnetic resonance (NMR) spectra were obtained using a Bruker AC-300 NMR spectrometer operating at 300.15 MHz, using CD 3 OD, D 2 O or DMSO-d 6 as a solvent. Analyses for carbon, hydrogen and nitrogen were carried out on an Exeter Analytical EA440 machine. N 2 adsorption-desorption isotherms at 77 K were obtained using a Micromeritics Gemini 2375 instrument. Samples were outgassed for at least 5 hours at 120C under N 2 (g). Analysis of the surface area and porosity of the hybrids and the silica products resulting from calcination was based on the method derived by Brunauer, Emmett and Teller (BET) 14,15. View chapter Purchase book Read full chapter URL: Scientific Bases for the Preparation of Heterogeneous Catalysts Ljubomir D. Dimitrov,. Ernesto A. Urquieta-Gonzalez, in Studies in Surface Science and Catalysis, 2006 2.2 Characterization Infrared spectra were recorded using the KBr pellet technique on a Perkin Elmer (Spectrum 100) FTIR Spectrometer from 1400 to 400 cm 1 with 32 scans and 4 cm 1 resolution. The nitrogen adsorptiondesorption isotherms of the samples were used to estimate the specific surface area ( S BET ) 6, the pore size distribution by the Barrett-Joyner-Halenda (BJH) method 7 and to establish the micropore volume ( V micro ) by the t-plot analysis 8. Transmission electron microscopy (TEM) of the samples was performed with a Philips CM-120 equipment, operating at 120 kV. The spectra were measured at 104.22 MHz with pulse length of 1 s and an acquisition time of 50 ms. The number of accumulated free induction decays was between 25,000 and 64,000. View chapter Purchase book Read full chapter URL: Preparation of Catalysts VII L. Baraket, A. Ghorbel, in Studies in Surface Science and Catalysis, 1998 3.2 Infrared study The infrared spectra of the mixture containing 5 chromium for different aging times are shown in figure 2. As infrared spectrum of aluminium acetylacetonate present two caracteristics bands at 1600 and 1535 cm 1 ( 7 ) we can therfore attribut the two news bands to ligand acetylacetonate anchored to aluminium. View chapter Purchase book Read full chapter URL: New Developments and Application in Chemical Reaction Engineering S. Chotisuwan,. B.C. Gates, in Studies in Surface Science and Catalysis, 2006 2.2 Catalyst characterization 2.2.1 IR spectroscopy IR spectra of adsorbed precursors on alumina were recorded before and after solvent removal with a Bruker IFS-66v spectrometer with a resolution of 4 cm 1. EXAFS spectroscopy and data analysis EXAFS experiments were performed at the National Synchrotron Light Source (beamline XI8B), Brookhaven National Laboratory, Upton, New York, USA. Infrared Spectrum Software ATHENA 5The EXAFS data processing was carried out with the software ATHENA 5 and analyzed with the software EXAFSPAK 6. EXAFS data were analyzed with phase shift and backscattering amplitudes calculated by FEFF7.0 7. The fittings were done both in r space ( r is interatomic distance from the absorber atom) and k space ( k is the wave vector) with application of k 0, k 1, and k 3 weightings. The EXAFS data of PtRuMgO prepared from cluster precursor treated in He scanned at Pt L III edge were Fourier transformed over the ranges 3.00 k r k 14.35 and 0.0 r 2 scanned at Pt Lm edge were Fourier transformed over the ranges 3.55 k k r View chapter Purchase book Read full chapter URL: From Zeolites to Porous MOF Materials - The 40th Anniversary of International Zeolite Conference I. Sobczak,. M. Ziolek, in Studies in Surface Science and Catalysis, 2007 2.3. FTIR spectroscopy The infrared spectra were recorded with Vector 22 (Bruker) spectrometer.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |