کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
585125 | 877906 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photooxidative N-de-ethylation of anionic triarylmethane dye (sulfan blue) in titanium dioxide dispersions under UV irradiation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Photooxidative N-de-ethylation of anionic triarylmethane dye (sulfan blue) in titanium dioxide dispersions under UV irradiation Photooxidative N-de-ethylation of anionic triarylmethane dye (sulfan blue) in titanium dioxide dispersions under UV irradiation](/preview/png/585125.png)
چکیده انگلیسی
The TiO2-mediated photocatalysis process has been successfully applied to degradation of dye pollutants. Our results indicate that the TiO2 surface is negatively charged, and the sulfan blue (SB) adsorbs onto the TiO2 surface through the positive di-ethylamino groups while the TiO2 surface is positively charged and the SB adsorbs onto the TiO2 surface through the negative sulfonyl groups. In order to obtain a better understanding of the mechanistic details of this TiO2-assisted photodegradation of the SB dye with UV irradiation, five intermediates of the processes were separated, identified, and characterized by the HPLC-ESI-MS technique, which included a positive- and negative-ion mode. The results indicated that the N-de-ethylation process continues until the N-de-ethylated SB dye is completely formed. The probable photodegradation pathways were proposed and discussed. The reaction mechanisms of UV/TiO2 proposed in this study should be useful for future applications of the technology to the decolorization of dyes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 137, Issue 3, 11 October 2006, Pages 1600-1607
Journal: Journal of Hazardous Materials - Volume 137, Issue 3, 11 October 2006, Pages 1600-1607
نویسندگان
Chiing-Chang Chen, Chung-Shin Lu, Fu-Der Mai, Chyan-Syang Weng,