N dlamini rw krause gu kulkarni and s h durbach 1 2 1

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Unformatted text preview: induced water decomposition on TiO2 electrode by Fujishima and Honda in 1972. Compared to other semiconductors TiO2 is less toxic, photostable and less expansive. However, its use is compromised by the large band gap (3.2 eV anatase and 3.0 eV rutile) which hinders its optical properties. The large band gap only allows higher energy (UV) of the solar spectrum to be utilized to produce photo -excited holes and electrons. Ultra-visible makes up ~5 % compared to ~50 % of visible light of the solar spectrum In this paper we present a facile method of preparing titania based metal oxides nanocomposite. The application of the synthesized nanocomposite is prima rily focused on water purification and complete mineralization of organic pollutants. Synthesis and characterization of CNTs -CoO-TiO2 nanocomposite was successfully achieved in a simple two step method. Samples were fully characterized with X -ray powder diffraction (XRD), to determine the crystallinity and phase of titania and cobalt in the composite. Estimate particle size was also determined from XRD. Raman spectroscopy was further employed to confirm the nature of TiO2. Morphological, particle size and distribution of the particles on CNTs was achieved by using microscopic techniques, such as field emission electron microscopy (FESEM) and transmission electron microscopy (TEM). Each of the microscopic techniques were coupled with an energy dispersive X-ray (EDX) to qualitatively measure the elemental composition of the nanocomposite. Since the nanocomposite were porous, surface area and pore volume measurements were determined by BET. MAT-O14 SYNTHESIS o-CARBOXYMETHYLCHITOSAN AS ECOFRIENDLY CORROSION INHIBITOR FOR MILD STEEL IN 1 M HCl Nurul Nu’Aim Razali and *Mohd Jain Kassim School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] o-Carboxymethylchitosan (OCMC) was synthesised by reacting chitosa n with monochloroacetic acid at 50 °C using 1:4 (v/v) of water and isopropanol. The structure of...
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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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