Doped titanium dioxide nanocrystalline powders with high photocatalytic activity

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.04.020· OSTI ID:21370491

Castro, A L ^[1]; Nunes, M R ^[2]; Ferreira, L P ^[3]; Jumas, J -C ^[4]; Costa, F M ^[2]; Florencio, M H ^[1]

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1. CQB/Dep. Quimica e Bioquimica, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa (Portugal)
2. CCMM/Dep. Quimica e Bioquimica, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa (Portugal)
3. CFMC-Universidade de Lisboa, Faculdade de Ciencias, Campo Grande, Ed. C8, 1749-016 Lisboa (Portugal)
4. Institut Charles Gerhardt (UMR 5253) Universite Montpellier 2, Place E. Bataillon, 34095 Montpellier Cedex 5 (France)

Doped titanium dioxide nanopowders (M:TiO{sub 2}; M=Fe, Co, Nb, Sb) with anatase structure were successfully synthesized through an hydrothermal route preceded by a precipitation doping step. Structural and morphological characterizations were performed by powder XRD and TEM. Thermodynamic stability studies allowed to conclude that the anatase structure is highly stable for all doped TiO{sub 2} prepared compounds. The photocatalytic efficiency of the synthesized nanopowders was tested and the results showed an appreciable enhancement in the photoactivity of the Sb:TiO{sub 2} and Nb:TiO{sub 2}, whereas no photocatalytic activity was detected for the Fe:TiO{sub 2} and Co:TiO{sub 2} nanopowders. These results were correlated to the doping ions oxidation states, determined by Moessbauer spectroscopy and magnetization data. - Graphical abstract: Doped titanium dioxide nanopowders (M:TiO{sub 2}; M=Fe, Co, Nb, Sb) with highly stable anatase structure were successfully synthesized through an hydrothermal route. The photocatalytic efficiencies of the synthesized nanopowders were tested and the results show an appreciable enhancement in the photoactivity of the Sb:TiO{sub 2} and Nb:TiO{sub 2}.

• OSTI ID: 21370491
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CATALYSIS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
DOPED MATERIALS
ELECTRON MICROSCOPY
HYDROTHERMAL SYNTHESIS
MATERIALS
MICROSCOPY
MOESSBAUER EFFECT
NANOSTRUCTURES
OXIDES
OXYGEN COMPOUNDS
PHOTOCATALYSIS
POWDERS
SCATTERING
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION