Facile synthesis of Mn/N-doped TiO2 on wood-based activated carbon fiber as an efficient visible-light-driven photocatalyst

Facile synthesis of Mn/N-doped TiO2 on wood-based activated carbon fiber as an efficient... The exploration of highly efficient and stable visible-light-driven photocatalysts for wastewater treatment has been recognized as one of the most challenging topics in environmental remediation. In this study, we report a new type of Mn/N co-doped TiO2 supported on wood-based activated carbon fiber (Mn–N/TiO2-WACF) composite material that can be synthesized via sol–gel method. XRD indicates that the nano-TiO2 particles in the composites are in the anatase phase (except when calcined at 850 °C) and the average crystallite size is approximately 23–33 nm. Doping with Mn and N significantly inhibits the crystal phase transformation of TiO2 from anatase to rutile. Photocatalytic experiments confirm that the Mn–N/TiO2-WACF catalysts are highly efficient and robust for the photodegradation of methylene blue under visible light irradiation (λ > 420 nm). Mn–N/TiO2-WACF exhibits the highest photocatalytic activity (reaches 99%) after calcined at 550 °C. The introduction of Mn and N not only improves the light adsorption and redox activity of TiO2, but also promotes photochemical stability because of narrow band gap energy and lower recombination rate of photoinduced electron–hole pairs. Composite photocatalysts such as these materials are important in the ongoing effort to design and explore new low cost, high efficiency, robust photocatalytic materials. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science Springer Journals

Facile synthesis of Mn/N-doped TiO2 on wood-based activated carbon fiber as an efficient visible-light-driven photocatalyst

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics
ISSN
0022-2461
eISSN
1573-4803
D.O.I.
10.1007/s10853-018-2429-7
Publisher site
See Article on Publisher Site

Abstract

The exploration of highly efficient and stable visible-light-driven photocatalysts for wastewater treatment has been recognized as one of the most challenging topics in environmental remediation. In this study, we report a new type of Mn/N co-doped TiO2 supported on wood-based activated carbon fiber (Mn–N/TiO2-WACF) composite material that can be synthesized via sol–gel method. XRD indicates that the nano-TiO2 particles in the composites are in the anatase phase (except when calcined at 850 °C) and the average crystallite size is approximately 23–33 nm. Doping with Mn and N significantly inhibits the crystal phase transformation of TiO2 from anatase to rutile. Photocatalytic experiments confirm that the Mn–N/TiO2-WACF catalysts are highly efficient and robust for the photodegradation of methylene blue under visible light irradiation (λ > 420 nm). Mn–N/TiO2-WACF exhibits the highest photocatalytic activity (reaches 99%) after calcined at 550 °C. The introduction of Mn and N not only improves the light adsorption and redox activity of TiO2, but also promotes photochemical stability because of narrow band gap energy and lower recombination rate of photoinduced electron–hole pairs. Composite photocatalysts such as these materials are important in the ongoing effort to design and explore new low cost, high efficiency, robust photocatalytic materials.

Journal

Journal of Materials ScienceSpringer Journals

Published: May 16, 2018

References

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