Synthesis of heterostructured Pd@TiO{sub 2}/TiOF{sub 2} nanohybrids with enhanced photocatalytic performance

Journal Article · Mon Aug 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.04.018· OSTI ID:22581611

Zhao, Xixia ^[1]; Wei, Guijuan ^[2]; Liu, Junxue ^[1]; Wang, Zhaojie ^[2]; An, Changhua ^[1]; Zhang, Jun ^[1]

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1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao, Shandong 266580 (China)
2. Department of Materials Physics and Chemistry, College of Science, China University of Petroleum, Qingdao, Shandong 266580 (China)

Highlights: • TiO{sub 2}/TiOF{sub 2} nanohybrids was synthesized via a two-step solvothermal method. • TiO{sub 2}/TiOF{sub 2} exhibited superior photoactivity in comparison with TiOF{sub 2} or TiO{sub 2}. • The photocatalytic activity was further improved by loading Pd nanoparticles. • Synergistic effect between TiOF{sub 2} and TiO{sub 2} was responsible for the enhanced photocatalytic performance over TiO{sub 2}/TiOF{sub 2}. - Abstract: TiO{sub 2}/TiOF{sub 2} heterostructured nanocomposites has been synthesized through a solvothermal method and characterized by X-ray diffraction, scanning electronic microscopy, transmission electronic microscopy, nitrogen adsorption–desorption isotherms, UV–vis and photo-luminescent spectroscopy. It was found that, compared with single TiOF{sub 2} or TiO{sub 2}, the as-prepared TiO{sub 2}/TiOF{sub 2} nanocomposites exhibited superior photoactivity towards the degradation of organic pollutants, i.e. rhodamine B and solar hydrogen evolution. The results are in accordance with the prohibition of photogenerated electrons and holes recombination in these two samples under light illumination. The photocatalytic activity can be further boosted by introducing Pd nanoparticles onto the surfaces of TiO{sub 2}/TiOF{sub 2} through a simple deposition method without using any stabilizers, which is probably attributed to the enhanced visible-light absorption as well as the facilitated charge-carrier separation after the introduction of Pd nanoparticles. The synergistic effect between TiOF{sub 2} and TiO{sub 2} was discussed and was responsible for the enhancement of their activity in comparison with single counterpart.

• OSTI ID: 22581611
• Journal Information: Materials Research Bulletin, Vol. 80; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CHARGE CARRIERS
COMPARATIVE EVALUATIONS
ELECTRONS
EMISSION SPECTROSCOPY
HOLES
HYDROGEN
ILLUMINANCE
NANOCOMPOSITES
NANOPARTICLES
NANOSTRUCTURES
PHOTOCATALYSIS
RECOMBINATION
RHODAMINES
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SYNTHESIS
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
VISIBLE RADIATION
X-RAY DIFFRACTION