Structural and photocatalytic properties of iron- and europium-doped TiO2 nanoparticles obtained under hydrothermal conditions
作者： L. Diamandescu , F. Vasiliu , D. Tarabasanu-Mihaila , M. Feder , A.M. Vlaicu
DOI: 10.1016/J.MATCHEMPHYS.2008.05.023
关键词:
摘要: Abstract Iron- and europium-doped (≤1 at.%) TiO 2 nanoparticles powders have been synthesized by a hydrothermal route at 200 °C, starting with TiCl 4 , FeCl 3 ·6H O EuCl O. The structure, morphology optical peculiarities were investigated means of X-ray diffraction (XRD), transmission electron microscopy (TEM), extended absorption fine structure (EXAFS), Mossbauer spectroscopy UV–vis measurements. photocatalytic performance was analysed in the photodegradation reaction phenol. Rietveld refinements XRD patterns reveal that as-prepared samples consist iron- tetragonal anatase structural shape, particle size as low 15 nm. By on both 57 Fe 151 Eu isotopes well EXAFS analyses, presence 3+ and/or ions nanosized has evidenced. It found iron europium can substitute for titanium structure. From reflection spectra, using transformed Kubelka–Munk functions, band gap energy ( E g ) determined comparison Degussa P-25 photocatalyst. A decrease from 2.9 eV photocatalyst to 2.8 eV titania doped 1 at.% evidenced, indicating valuable shift (∼20 nm) towards visible light region. However, best activity phenol evidenced sample, : Fe, 0.5 at.% Eu, UV regions. activities iron-doped iron–europium-codoped are high practically same only light. properties correlation discussed.
elsevier.com
sci-hub.se 参考文章(30)
W. Li, A. I. Frenkel, J. C. Woicik, C. Ni, S. Ismat Shah, Dopant location identification in Nd3+ doped TiO2 nanoparticles Physical Review B. ,vol. 72, pp. 155315- ,(2005) , 10.1103/PHYSREVB.72.155315
Masaaki Kitano, Masaya Matsuoka, Michio Ueshima, Masakazu Anpo, Recent developments in titanium oxide-based photocatalysts Applied Catalysis A-general. ,vol. 325, pp. 1- 14 ,(2007) , 10.1016/J.APCATA.2007.03.013
Wu Pingxiao, Tang Jianwen, Dang Zhi, Preparation and photocatalysis of TiO2 nanoparticles doped with nitrogen and cadmium Materials Chemistry and Physics. ,vol. 103, pp. 264- 269 ,(2007) , 10.1016/J.MATCHEMPHYS.2007.02.023
A. Sclafani, L. Palmisano, M. Schiavello, Influence of the preparation methods of titanium dioxide on the photocatalytic degradation of phenol in aqueous dispersion The Journal of Physical Chemistry. ,vol. 94, pp. 829- 832 ,(1990) , 10.1021/J100365A058
Andrzej Sobczyński, Łukasz Duczmal, Wojciech Zmudziński, Phenol destruction by photocatalysis on TiO2: an attempt to solve the reaction mechanism Journal of Molecular Catalysis A: Chemical. ,vol. 213, pp. 225- 230 ,(2004) , 10.1016/J.MOLCATA.2003.12.006
A Di Paola, E Garcı́a-López, S Ikeda, G Marcı̀, B Ohtani, L Palmisano, Photocatalytic degradation of organic compounds in aqueous systems by transition metal doped polycrystalline TiO2 Catalysis Today. ,vol. 75, pp. 87- 93 ,(2002) , 10.1016/S0920-5861(02)00048-2
P. Fernández, J. Blanco, C. Sichel, S. Malato, Water disinfection by solar photocatalysis using compound parabolic collectors Catalysis Today. ,vol. 101, pp. 345- 352 ,(2005) , 10.1016/J.CATTOD.2005.03.062
L. Palmisano, M. Schiavello, A. Sclafani, C. Martin, I. Martin, V. Rives, Surface properties of iron-titania photocatalysts employed for 4-nitrophenol photodegradation in aqueous TiO2 dispersion Catalysis Letters. ,vol. 24, pp. 303- 315 ,(1994) , 10.1007/BF00811803
Wei-Guang Zhang, Li-Li Zhang, Zheng-Jing Jiang, Rong-Qing Li, Xu-Jie Yang, Xin Wang, Lu-De Lu, Synthetic route to the nano-sized titania with high photocatalytic activity using a mixed structure-directing agent Materials Chemistry and Physics. ,vol. 105, pp. 414- 418 ,(2007) , 10.1016/J.MATCHEMPHYS.2007.05.008
Ping Yang, Cheng Lu, Nanping Hua, Yukou Du, Titanium dioxide nanoparticles co-doped with Fe3+ and Eu3+ ions for photocatalysis Materials Letters. ,vol. 57, pp. 794- 801 ,(2002) , 10.1016/S0167-577X(02)00875-3