Effect of Ag-N Co-Doping in Nanosize TiO2 on Photocatalytic Degradation of Methyl Orange Dye


  • Haramaya University, Chemistry Department, Dire Dawa, Ethiopia


Synergetically modified nanosize TiO2 semiconductor heterogeneous photocatalyst powder has been synthesized from TiCl4 precursor for producing efficient photocatalyst that may work under visible radiation. The crystallite phase and size of the as-synthesized photo-catalyst were determined by X-ray diffraction (XRD) technique. As-synthesized TiO2 was found to be nano-crystalline anatase. The absorption edge of the photo-catalyst was evaluated from the UV/ Visible diffuse absorbance spectra. The band gap energies (Ebg) of undoped-, Ag-doped-, Ndoped- and Ag-N co-doped TiO2 semiconductor photo-catalysts were found to be 3.14, 3.02, 2.56 and 2.45 eV, respectively. Co-doping of Ag and N in TiO2 has shown synergetic effect towards photo-catalytic degradation of methyl orange in aqueous solutions. Using Ag-N co-doped TiO2 photo-catalyst, degradation of methyl orange under UV and visible irradiations were 79.1% and 73.5%, respectively.


Absorbance, Degradation, Diffraction, Nanoparticles, Photo-Catalyst.

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