کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
48402 46505 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface-enhanced Raman study of electrochemical and photocatalytic degradation of the azo dye Janus Green B
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Surface-enhanced Raman study of electrochemical and photocatalytic degradation of the azo dye Janus Green B
چکیده انگلیسی

The photocatalytic degradation of Janus Green B azo dye over silver modified titanium dioxide films was investigated by surface-enhanced Raman spectroscopy (SERS). An optimized SERS-active substrate was employed to study the photodegradation reaction of Janus Green B. Considering that photocatalytic degradation processes of organic molecules adsorbed on TiO2 might involve either their oxidation or reduction reaction, the vibrational spectroelectrochemical study of the dye was also performed, in order to clarify the transformations involved in initial steps of its photochemical decomposition. In order to understand the changes in Raman spectra of Janus Green B after photodegradation and/or electrochemical processes, a vibrational assignment of the main Raman active modes of the dye was carried out, based on a detailed resonance Raman profile. Products formed by electrochemical and photochemical degradation processes were compared. The obtained results revealed that the first steps of the degradation process of Janus Green B involve a reductive mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 77, Issues 3–4, 10 January 2008, Pages 339–345
نویسندگان
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