Abstract
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•Pure TiO2 was prepared through a one-step hydrothermal method.•Ar/HF/DBD-TiO2 was prepared by dielectric barrier discharge plasma, and F modification of TiO2 was realized.•Material characterization analysis found ≡Ti-F bonds, lattice F doping, and oxygen defects.•The band gap of TiO2 was reduced from 3.0 eV to 2.78 eV, and the separation rate of the electron-hole pair was enhanced.
F modification of titanium dioxide through a plasma method was achieved for the first time. The F modification of titanium dioxide was accomplished by Ar/HF dielectric barrier discharge, including the introduction of Ti-F bonds, interstitial F doping, and substitution of F doping. The characterization results showed that the band gap of Ar/HF/DBD-TiO2 was reduced to 2.78 eV, the fluorescence intensity was greatly reduced, and the electron-hole recombination rate was reduced. The degradation rate of methylene blue by F modified titanium dioxide under visible light reached 92%.