نوع مقاله : مقاله علمی پژوهشی
نویسندگان
1 آزمایشگاه تحقیقاتی شیمی کاربردی، گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران
2 آزمایشگاه تحقیقاتی شیمی کاربردی، گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران و دانشکده شیمی کاربردی، دانشکده شیمی، دانشگاه تبریز، تبریز، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In the present study, copper oxide (CuO) nanosheets were synthesized by a bottom-up (hydrothermal) method. The structural properties, morphology and particle size of the synthesized nanosheets were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) analyses. In addition, the photocatalytic properties of the hydrothermally synthesized nanosheets in the removal of the organic dye reactive black 5 were studied and on the other hand, the photocatalytic activity of these nanosheets was compared with spherical copper oxide nanoparticles. The charge transfer during the photocatalytic process and electrochemical properties of the nanosheets and the nanoparticles were investigated by photocurrent, photoluminescence and impedance analyses, respectively. The results showed that copper oxide nanosheets had a higher removal rate (79.42) than copper oxide nanoparticle (32.23). On the other hand, increasing the photocurrent density and decreasing the electrochemical impedance value support the reduction of the recombination rate of the electron-hole pair generated by the light in the nanosheets compared to the copper oxide nanoparticles. Also, the increase in the surface area of the nanosheets compared to the copper oxide nanoparticles led to the creation of active sites for the generation of hydroxyl radicals by the holes created in the valence band to increase the photocatalytic efficiency. Finally, the copper oxide nanosheets can be introduced as highly active photocatalysts for the removal of dye and pharmaceutical pollutants.
کلیدواژه‌ها [English]
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