کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6974053 1453323 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sonophotocatalytic degradation of textile dyes over Cu impregnated ZnO catalyst in aqueous solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Sonophotocatalytic degradation of textile dyes over Cu impregnated ZnO catalyst in aqueous solution
چکیده انگلیسی
To increase the performance of ZnO from UV to visible light, ZnO particles were impregnated with copper (Cu) using wet impregnation method. The synthesized impregnated ZnO was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), Fourier transformed infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The degradation of dyes with sonophotocatalytic process was high as compared to photocatalytic and sonocatalytic. The effects of the copper impregnated ZnO (Cu-ZnO) catalyst on the degradation of two textile dyes were investigated using the parameters like pH, catalyst dose, radical enhancer, radical scavenger and initial dye concentration. The addition of radical enhancer (H2O2) increased the degradation efficiency from 35% to 95% at pH 10. At optimum conditions, maximum degradation of dyes were 100% in 20 min using sonophotocatalytic degradation as compared to photocatalytic process the degradation efficiency was 95-98% in 60 min. With the addition of carbonate, sulphate and chloride as radical scavengers, the degradation efficiency decreased from 100% to 92%, 94% and 92% with 0.025 M concentration of each scavenger, respectively. The degradation efficiency decreased only 5% after repeated use of Cu-ZnO catalyst. Therefore, Cu-ZnO catalyst can be used as a promising sonophotocatalyst for degradation of textile dyes with excellent reusability potential.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 116, May 2018, Pages 149-158
نویسندگان
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