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

Polymers

Xiaojun Ma¹  Yin Chen² 

[1] Department of Wood Science and Technology, Tianjin University of Science & Technology, Tianjin 300222, China; E-Mail

关键词: wood-based activated carbon fiber;    Mn/N co-doped TiO₂;    surface functional group;    photodegradation;   

DOI  :  10.3390/polym7091476

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
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