کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5365648 1388334 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pt(II) porphyrin modified TiO2 composites as photocatalysts for efficient 4-NP degradation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Pt(II) porphyrin modified TiO2 composites as photocatalysts for efficient 4-NP degradation
چکیده انگلیسی

Three Pt(II) porphyrins 5,10,15,20-tetra-[2 or 3 or 4-(3-phenoxy)propoxy]phenyl porphyrin]platinum(II) (1-3) were synthesized and characterized spectroscopically. The corresponding Pt(II) porphyrins-TiO2 composites were then prepared and characterized by means of FT-IR and diffused reflectance spectra, X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of Pt(II) porphyrins-TiO2 catalyst was investigated by testing the photodegradation of 4-nitrophenol (4-NP) in aqueous solution under irradiation with Xenon lamp. The results indicated that Pt(II) porphyrins greatly enhanced the photocatalytic efficiency of bare TiO2 in photodegrading the 4-NP, and the distinct space tropisms of peripheral substituents in meso-sites of porphyrin ring led to different results.

► Three new Pt(II) porphyrin modified TiO2 composites as photocatalysts were investigated for the first time. ► Pt(II) porphyrins greatly enhanced the photocatalytic efficiency of bare TiO2 in photodegrading the 4-NP. ► The distinct space tropisms of peripheral substituents in meso-sites of porphyrin ring led to different photoactivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 258, Issue 14, 1 May 2012, Pages 5499-5504
نویسندگان
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