کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5369364 | 1388428 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improving visible-light photocatalytic activity of N-doped TiO2 nanoparticles via sensitization by Zn porphyrin Improving visible-light photocatalytic activity of N-doped TiO2 nanoparticles via sensitization by Zn porphyrin](/preview/png/5369364.png)
In order to utilize visible light more efficiently in the photocatalytic reaction, N-doped TiO2 (N-TiO2) nanoparticles sensitized by Zn porphyrin including [tetrakis(4-carboxyphenyl)porphyrinato]zinc(II) (ZnTCPP) and [tetraphenyl-porphyrinato]zinc(II) (ZnTPP) were prepared, and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic absorption spectrometry (AAS), Fourier transform infrared spectroscopy (FT-IR) and UV-vis spectroscopy, etc. The characterization results show that the ZnTCPP is chemisorbed on the surface of TiO2 through an OCOTi bond; while the ZnTPP is physically adsorbed. N-TiO2 sensitized by Zn porphyrin exhibits higher absorption in the visible-light region and photocatalytic degradation efficiency of methylene blue under visible-light irradiation than N-TiO2 and TiO2 sensitized by ZnTCPP. Moreover, their visible-light photocatalytic mechanism was discussed.
Journal: Applied Surface Science - Volume 255, Issue 5, Part 2, 30 December 2008, Pages 2879-2884