In this study, an attempt has been made to study the
photocatalytic degradation of R6G in aqueous solution under visible light
irradiation by using Ag doped ZnO. Silver ion doping is done by liquid
impregnation method. Rhodamine 6G (R6G) is a basic dye used to dye wool,
cotton, silk and paper where brilliant shades of fluorescent effects are
required. But the release of this complex dye and its products in to the
environment is hazardous. ZnO was doped with Ag of varying concentrations such
as 0.5, 1.0, 1.5 atom percentages by liquid impregnation method in order to
improve its photocatalytic activity and the samples were calcined at various
temperatures for 2 h. The catalyst was characterized by XRD and SEM. The XRD
patterns indicates well indexed phases of ZnO wurtize structure with no shift
in peak positions and SEM images shows that the particles are in different
shapes and sizes. Band gaps of ZnO and silver doped ZnO were calculated from
UV-Visible Diffuse Reflectance Spectroscopic studies. The band gap energy of
pure ZnO was found to be 3.28 eV and is slightly decreased to 3.27 eV for 1.0
atom% Ag-ZnO and remains unaffected for 0.5 and 1.5 atom% Ag-ZnO. The
photocatalytic activity of ZnO was found to be enhanced by Ag doping. The dye
degradation was investigated at different initial dye concentrations and
photocatalyst doses.
Author(s) Details:
S. Siva Kumar,
Department of Chemistry, Anil Neerukonda Institute of Technology and
Sciences, Sangivalasa, Visakhapatnam-531 162, India.
P. Viswarupachary,
Department
of Physics, Anil Neerukonda Institute of Technology and Sciences, Sangivalasa,
Visakhapatnam-531 162, India.
V. Ranga Rao,
Department of Chemistry, Government College (A), Rajahmundry-533
105, India.
G. Nageswara Rao,
School of Chemistry, Andhra University, Visakhapatnam-530 003,
India.
Please see the link here: https://stm.bookpi.org/CICMS-V6/article/view/13526
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