کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5144486 | 1496865 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sonochemical-assisted synthesis of CuO/Cu2O/Cu nanoparticles as efficient photocatalyst for simultaneous degradation of pollutant dyes in rotating packed bed reactor: LED illumination and central composite design optimization
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
CuO/CuO2/Cu nanoparticles were prepared by sonochemical combined thermal synthesis method and used as new photocatalyst for simultaneous photocatalytic degradation of safranin O (SO) and methylene blue (MB) dyes in rotating packed bed reactor equipped to blue light emitting diode (LED). The physicochemical properties of the synthesized CuO/Cu2O/Cu nanoparticles were investigated by XRD, SEM and DRS analysis. The band-gap of the prepared CuO/Cu2O/Cu-NPs was estimated to be about 1.42Â eV which is appropriate for photodegradation process under blue light irradiation. In rotating packed bed reactors, two key parameters are very important, one high centrifugal field and other porous media, which intensify mass transfer operation leads to photodegradation improvement. The maximum photodegradation efficiency was obtained at pH of 6 and subsequently the effects of CuO/Cu2O/Cu-NPs dosage, rotational speed, initial dyes concentration, flow rate and reaction time were studied by central composite design (CCD) and optimized values were found to be 0.3Â g/L, 900Â rpm, 10Â mg/L of both dyes, 0.3Â L/min and 90Â min, respectively. Finally, results showed that synergistic effects induced by forming Cu2O/CuO heterojunction containing Cu-NPs co-cocatalyst greatly accelerate electron transfer and effectively retard the reduction of CuO by photo-generated electrons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 40, Part A, January 2018, Pages 601-610
Journal: Ultrasonics Sonochemistry - Volume 40, Part A, January 2018, Pages 601-610
نویسندگان
Soleiman Mosleh, Mahmood Reza Rahimi, Mehrorang Ghaedi, Kheibar Dashtian, Shaaker Hajati,