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Title: Study of the photocatalytic activity of Fe3+, Cr3+, La3+ and Eu3+ single-doped and co-doped TiO2 catalysts produced by aqueous sol-gel processing

Journal Article · · Journal of Alloys and Compounds
 [1];  [1];  [1];  [1];  [2];  [3];  [4];  [1];  [5]
  1. Univ. de Liege, Liege (Belgium)
  2. Julich Centre for Neutron Science JCNS and Peter Grunberg Institute PGI, JARA-FIT, Forschungszentrum Julich, GmbH, Julich (Germany); Univ. de Liege, Liege (Belgium)
  3. Julich Centre for Neutron Science JCNS and Peter Grunberg Institute PGI, JARA-FIT, Forschungszentrum Julich, GmbH, Julich (Germany)
  4. Julich Centre for Neutron Science JCNS and Peter Grunberg Institute PGI, JARA-FIT, Forschungszentrum Julich, GmbH, Julich (Germany); Univ. de Liege, Liege (Belgium); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Western Sydney (Australia); Univ. of the Sunshine Coast (Australia)

An aqueous sol-gel process, previously developed for producing undoped and Cu2+, Ni2+, Zn2+ or Pb2+ doped TiO2 photocatalysts with remarkably high photocatalytic activity without requiring any calcination step, has been adapted to produce Fe3+, Cr3+, La3+ or Eu3+ single-doped TiO2 photocatalysts as well as La3+-Fe3+ and Eu3+-Fe3+ co-doped TiO2 catalysts. The physicochemical properties of the obtained catalysts have been characterized using a suite of complementary techniques, including ICP-AES, XRD, UV-Vis spectroscopy, nitrogen adsorption-desorption and Fe-57 M ssbauer. The active crystalline phase is obtained without requiring any calcination step and all the different catalysts are composed of nanocrystallites of anatase with a size of 6-7 nm and a high specific surface area varying from 181 to 298 m2 g-1. In this study, the effect of the NO3:Ti(IV) mole ratio used to induce the peptisation reaction during the synthesis has been studied and the results revealed that this ratio can influence significantly the textural properties of the resulting catalyst. A screening of the photocatalytic activity of the undoped and Fe3+, Cr3+, La3+ or Eu3+ single-doped and co-doped photocatalysts has been performed by evaluating the degradation of 4-nitrophenol under UV-Visible light (330 nm < < 800 nm). This study suggests that the photocatalytic activity is significantly influenced by the dopant nature and content with an optimal dopant content being observed in the case of Fe3+ or La3+ single-doped as well as in the case of La3+-Fe3+ and Eu3+-Fe3+ co-doped catalysts. In the case of Cr3+ single-doped catalysts, a detrimental effect of the dopant on the photocatalytic degradation of 4-nitrophenol has been observed while no significant influence of the dopant has been detected in the case of Eu3+ single-doped catalysts. In conclusion, the role of the different dopants in modulating the photocatalytic activity is discussed.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1326518
Alternate ID(s):
OSTI ID: 1359245
Journal Information:
Journal of Alloys and Compounds, Vol. 691, Issue C; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 46 works
Citation information provided by
Web of Science

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Preparation and Evaluation of Exhaust-Purifying Cement Concrete Employing Titanium Dioxide journal July 2019
Effects of Ag 0 -modification and Fe 3+ -doping on the structural, optical and photocatalytic properties of TiO 2 journal January 2019
Recent Advances and Applications of Semiconductor Photocatalytic Technology journal June 2019
Visible Light Sensitive SnO2/ZnCo2O4 Material for the Photocatalytic Removal of Organic Pollutants in Water journal June 2019
Study on preparation and visible-light activity of Ag–TiO2 supported by artificial zeolite journal January 2018
Highly Efficient Low-Temperature N-Doped TiO2 Catalysts for Visible Light Photocatalytic Applications journal April 2018
Acid acting as redispersing agent to form stable colloids from photoactive crystalline aqueous sol–gel TiO2 powder journal July 2018
Effect of high energy ball milling on the physicochemical properties of TiO2–CeO2 mixed oxide and its photocatalytic behavior in the oxidation reaction journal March 2019
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