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http://nopr.niscpr.res.in/handle/123456789/34257| Title: | Hydrothermal synthesis and enhanced sunlight photoactivity of Gd, N, and P tri-doped anatase-TiO2 by TiCl4 hydrolysis |
| Authors: | Jiang, Hongquan Gao, Mengdie Zang, Shuying Li, Jingshen Wang, Xuefeng |
| Keywords: | Gd, N, and P tri-doping;Hydrolysis;Photocatalysis;Synergetic effect;Titanium dioxide;TiCl4 |
| Issue Date: | May-2016 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Gd, N, and P tri-doped anatase-TiO2 (GNPTO) nano-photocatalyst has been synthesized from TiCl4 hydrolysis using gadolinium nitrate, urea, and phosphoric acid as dopant sources via a hydrothermal process followed by calcination at 400°C. The physicochemical properties of as-synthesized samples have been investigated by X-ray diffraction, transmission electron microscopy, N2 physical adsorption-desorption, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, UV-vis absorbance spectroscopy, and photoluminescence spectroscopy techniques. Doped P in the TiO2 lattices plays a predominant role in inhibiting the phase transformation and crystal growth, and in improving the surface textural properties. Gd, N, and P tri-doping inhibits the recombination of photogenerated electrons and holes, increases the surface hydroxyls, and improves the UV absorption. GNPTO exhibits the highest photoactivity towards 4-chlorophenol (4-CP) degradation under simulated sunlight irradiation among the undoped, doped, and P25 TiO2. ·OH radicals play a key role in 4-CP degradation, and photogenerated electrons also play a minor role through the final formation of ·OH via H2O2. Synergetic mechanism of the enhanced photoactivity for GNPTO has also been discussed. |
| Page(s): | 187-195 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Appears in Collections: | IJCT Vol.23(3) [May 2016] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCT 23(3) 187-195.pdf | 275.26 kB | Adobe PDF | View/Open |
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