期刊
ROYAL SOCIETY OPEN SCIENCE
卷 5, 期 6, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.172005
关键词
TiOF2; OH-TiO2/TiOF2; MB; solar light; TiO2; network
资金
- Shaanxi Key Industrial Projects [2014GY2-07]
- Shaanxi Province Education Department Science and Technology Research Plan [15JK1460]
TiO2/TiOF2 nanohybrids were quickly synthesized through a hydrothermal process using titanium n-butoxide (TBOT), ethanol (C2H5OH) and hydrofluoric add as precursors. The prepared nanohybrids underwent additional NaOH treatment (OH-TiO2/TiOF2) to enhance their photocatalytic performance. In this paper, the mechanism of NaOH affecting the pathway of transformation from TBOT (Ti precursor) to TiO2 nanosheets was discussed. The synthesized TiO2/TiOF2 and OH-TiO2/TiOF2 were characterized by field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction pattern (XRD), Fourier infrared spectroscopic analysis (FT-IR), Photoluminescence (PL) emission spectra and UV-visible diffuse reflection spectra (UV-vis DRS). The photocatalytic activity and stability of synthesized samples were evaluated by degradation of methylene blue (MB) under the simulated solar light The results showed that a larger ratio of TiO2 to TiOF2 in TiO2/TiOF2 and OH-TiO2/TiOF2 nanohybrids could allow for even higher MB conversion compared with only TiO( )nanosheets. NaOH treatment can wash off the F ions from ITOF2 and induce this larger ratio. The highest efficiency of MB removal was just above 90% in 1 h. Lower electron-hole pairs recombination rate is the dominant factor that induces the photocatalytic performance enhancement of Ti0O/Ti0O(2) nanohybrids. The synthesized 0O-Ti0O/Ti0O(2) nanohybrids exhibit great potential in the abatement of organic pollutants.
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