نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی شیمی، دانشگاه بناب، بناب، ایران
2 دانشکده مهندسی شیمی، دانشگاه بناب، بناب، ایران
3 دانشکده مهندسی پلیمر، دانشگاه بناب، بناب، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this study, ZnO photocatalysts doped with various weight percentages of cerium were synthesized using a green synthesis method and applied for the removal of dye pollutants, namely methylene blue and rhodamine B. The addition of Ce up to 3 wt% led to a reduction in particle size, more uniform particle distribution, increased specific surface area, and improved structural and optical properties. However, increasing the Ce content to 5 wt% resulted in particle aggregation, reduced surface area, and non-uniform distribution due to doping saturation and the incomplete incorporation of Ce into the ZnO lattice. Ce doping also reduced the band gap energy, with values of 3.2 eV for pure ZnO and 2.95 eV for the ZnO doped with 3 wt% Ce (ZnCe3). Among the samples, ZnCe3 exhibited the best performance, achieving 94.6% degradation of methylene blue and 93.9% of rhodamine B within 180 minutes. This high efficiency is attributed to the narrower band gap, higher surface area, uniform particle distribution, and enhanced electron–hole separation. Overall, the results demonstrate that doping ZnO with an optimal amount of cerium (3 wt %) combined with green synthesis significantly enhances its photocatalytic efficiency in the degradation of organic dyes.
کلیدواژهها [English]
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