The activities of the catalysts were tested in n

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Unformatted text preview: llah, Sugeng Triwahyono, Aishah Abdul Jalil, Ainul Hakimah Karim, 1 1 Nurun Najwa Ruslan and Sharifah Najiha Timmiati Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, Johor, Malaysia 2 Department of Chemical Eng., Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia E-mail: [email protected] 1 2 1 1 Pyridine pre-adsorbed FTIR was used for quantitative study of acidic properties of solid acid catalysts. The ratio of Brönsted to Lewis acid sites and the molar absorption coefficients of solid acid catalysts were determined by interconversion of probe molecules (pyridine) on Brönsted and Lewis acid sites in 2the present of H2O. Platinum tungsten zirconia (Pt/WO3-ZrO2), Platinum sulfated zirconia (Pt/SO4 -ZrO2), 22Platinum sulfated alumina (Pt/SO4 -Al2O3), and Platinum sulfated silica (Pt/SO4 -SiO2) were used as sample catalysts. These catalysts were prepared by impregnation method followed by calcinations at 823 K for 3 h. The physical and chemical properties of the catalysts were deter mined by X-ray diffraction analysis (XRD), Fourier transformed infrared spectroscopy (FTIR), Pyridine pre -adsorbed FTIR spectroscopy and Nitrogen physisorption analysis. The ratio of Brönsted to Lewis acid sites of Pt/WO 3222ZrO2, Pt/SO4 -ZrO2, Pt/SO4 -Al2O3 and Pt/SO4 -SiO2 were 1.99, 1.83, 5.05, 1.20 respectively. 148 3rd ICYC 2010 Universiti Sains Malaysia MAT-O13 23rd-25th June 2010 A FACILE METHOD OF PREPARING TITANIA BASED BINARY METAL OXIDE NANOCOMPOSITES: CNTs/TiO2-COO; SYNTHESIS AND CHARACTERIZATION 1 L.N. Dlamini, *R.W. Krause, G.U. Kulkarni and S. H. Durbach 1 2 1 1 2 Department of Chemical Technology, University of Johannesburg, Doornfontein 2028, South Africa Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India E-mail: [email protected] Interest on the photocatalytic nature of titania (TiO 2) exploded since the discovery of photo-...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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