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- Title
Efficiently Synthetic TiO Nano-sheets for PCE, TCE, and TCA Degradations in Aqueous Phase Under VUV Irradiation.
- Authors
Biyoghe Bi Ndong, Landry; Ibondou, Murielle; Gu, Xiaogang; Xu, Minhui; Lu, Shuguang; Qiu, Zhaofu; Sui, Qian; Mbadinga, Serge
- Abstract
The present study investigates the applicability of the synthesized titanium dioxide (TiO) for the removal of tetrachloroethene (PCE), trichloroethene (TCE), and 1,1,1-trichloroethane (TCA) in aqueous phase under VUV illumination. The photo-degradation results indicated that these harmful chemicals can be effectively removed under VUV irradiation, and the addition of the synthesized TiO significantly enhanced their degradation. Moreover, using nitrobenzene (NB) as a probe of hydroxyl radical (·OH), the NB degradation rate was better over VUV/synthesized TiO, suggesting the high concentration of OH generated. The TiO used has been synthesized by a simple hydrothermal solution containing tetrabutyl titanate and hydrofluoric acid and characterized by using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), and X-ray photo-electron spectroscopy (XPS). The characterization results showed that the synthesized TiO was in anatase form and consisted of well-defined sheet-shaped structures having a rectangular outline with a thickness of ~4 nm, side length of ~50 nm, and width of ~33 nm and has a surface of 90.3 m g. XPS analysis revealed the formation of ≡ Ti-F surface bonds. Moreover, the synthesized TiO nano-sheets have shown good stability after testing their photo-catalytic activity through five cycles of reuse in TCE degradation. In summary, it can be concluded from the results on both photo-catalytic activity and the surface analyses that the synthesized TiO nano-sheets have a great potential for application in chlorinated solvent-contaminated groundwater remediation.
- Subjects
TITANIUM oxides; TETRACHLOROETHYLENE; TRICHLOROETHYLENE; TRICHLOROETHANE; PHOTODEGRADATION; ULTRAVIOLET water treatment
- Publication
Water, Air & Soil Pollution, 2014, Vol 225, Issue 5, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-014-1951-8