کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1654734 1517350 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photobleaching of metal phthalocyanine sulfonates under UV and visible light irradiation over TiO2 semiconductor
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Photobleaching of metal phthalocyanine sulfonates under UV and visible light irradiation over TiO2 semiconductor
چکیده انگلیسی

The stability of eleven metal phthalocyanine sulfonates against UV (λ > 320 nm) or visible light (λ > 450 nm) in the presence of TiO2 semiconductor was studied in an aqueous medium. Although all the dyes were quite photostable in a homogeneous solution, they underwent notably photobleaching in the presence of TiO2. The degree of dye bleaching was strongly dependent on the central metal in the complex, whereas for each complex the bleaching rate under UV irradiation was much faster than that under visible light irradiation. The spectral analysis showed that the dye photobleaching led to complete destruction of the phthalocyanine ring. In addition, the visible light stability of the dye was greatly affected by physical properties of TiO2 semiconductor, and the dye photostability could be improved by addition of electron sacrifice such as 4-chlorophenol.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 59, Issues 29–30, December 2005, Pages 4016–4019
نویسندگان
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