کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4763217 1422961 2017 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards wastewater treatment: Photo-assisted electrochemical degradation of 2-nitrophenol and orange II dye at a tungsten trioxide-exfoliated graphite composite electrode
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Towards wastewater treatment: Photo-assisted electrochemical degradation of 2-nitrophenol and orange II dye at a tungsten trioxide-exfoliated graphite composite electrode
چکیده انگلیسی
The degradation of organics in water treatment by electrochemical and photo-assisted electrochemical processes was carried out using a photoanode consisting of tungsten trioxide (WO3) and exfoliated graphite (EG). The WO3-EG nanocomposite was characterised using voltammetry, X-ray diffractometry, Raman and FTIR spectroscopy, and scanning electron microscopy connected to energy dispersive X-ray spectrometry. The applicability of the WO3-EG as photoanode material was investigated by the degradation of 2-nitrophenol and orange II dye as model organic pollutants in a 0.1 M Na2SO4 solution, using a 10 mA cm−2 current density. The removal efficiencies and the extent of mineralisation of the dye and 2-nitrophenol were monitored using a UV-Visible spectrophotometer and a TOC analyser respectively. The results showed that the WO3-EG nanocomposite electrode gave a higher removal efficiency (82% for 2-nitrophenol and 95% for orange II dye) and a higher degree of mineralisation (69% for 2-nitrophenol and 67% for orange II dye) in comparison to the EG electrode. Furthermore, efforts were made to evaluate the degradation intermediates which indicated the formation of carboxylic acids that were further degraded by hydroxyl radicals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 317, 1 June 2017, Pages 290-301
نویسندگان
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