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Preparation and Characterization of Mn/N Co-Doped TiO2 Loaded on Wood-Based Activated Carbon Fiber and Its Visible Light Photodegradation

by Xiaojun Ma * and Yin Chen
Department of Wood Science and Technology, Tianjin University of Science & Technology, Tianjin 300222, China
*
Author to whom correspondence should be addressed.
Academic Editor: Michael K. C. Tam
Polymers 2015, 7(9), 1660-1673; https://doi.org/10.3390/polym7091476
Received: 18 June 2015 / Revised: 25 August 2015 / Accepted: 27 August 2015 / Published: 7 September 2015
(This article belongs to the Special Issue Stimuli-Responsive Polymers and Colloids)
Using MnSO4·H2O as manganese source and urea as nitrogen source, Mn/N co-doped TiO2 loaded on wood-based activated carbon fiber (Mn/Ti-N-WACF) was prepared by sol–gel method. Mn/Ti-N-WACF with different Mn doping contents was characterized by scanning electron microscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopies (XPS), and ultraviolet-visible spectrophotometer. Results showed that the loading rate of TiO2 in Mn/Ti-N-WACF was improved by Mn/N co-doping. After calcination at 450 °C, the degree of crystallinity of TiO2 was reduced due to Mn/N co-doption in the resulting Mn/Ti-N-WACF samples, but the TiO2 crystal phase was not changed. XPS spectra revealed that some Ti4+ ions from the TiO2 lattice of Mn/Ti-N-WACF system were substituted by doped Mn. Moreover, new bonds formed within N–Ti–N and Ti–N–O because of the doped N that substituted some oxygen atoms in the TiO2 lattice. Notably, the degradation rate of methylene blue for Mn/Ti-N-WACF was improved because of the co-doped Mn/N under visible-light irradiation. View Full-Text
Keywords: wood-based activated carbon fiber; Mn/N co-doped TiO2; surface functional group; photodegradation wood-based activated carbon fiber; Mn/N co-doped TiO2; surface functional group; photodegradation
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Ma, X.; Chen, Y. Preparation and Characterization of Mn/N Co-Doped TiO2 Loaded on Wood-Based Activated Carbon Fiber and Its Visible Light Photodegradation. Polymers 2015, 7, 1660-1673.

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