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چکیده
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The organic dyes are widely used in various industries such as ceramics, drug, cosmetic, textile,
printing, food processing and paper. The release of organic dyes as chemically and biologically stable
pollutants into the wastewater has become one of the main sources of water pollution in the
environment. However, it is necessary to develop ecofriendly and efficient methods for the
degradation of organic dyes. In this work, SnO2/ZnO/eggshell nanocomposites has been synthesized
using teucriumpolium as a reducing agent and a stabilizer. The SnO2/ZnO/eggshell nanocomposites
were successfully used as an efficient and green photocatalyst for the degradation of organic dyes such
as bromocresol green and methylene blue under UV irradiation. The degradation efficiencies of 81%
and 95% were achieved for bromocresol green and methylene blue, respectively, after 3 hours. The
present approach has advantages such as rapidity, simplicity, high yield, low cost and most
importantly, the use a bio-waste material of eggshell as support for nanocomposites.
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