Butyl titanate,hydrofluoric acid and absolute ethanol were used to prepare TiOF2 under low temperature.Alkali was then used to wash the as prepared TiOF2 to get TiOF2-OH.The crystal structure,morphology and light absorption properties of the samples were studied by X-ray diffraction (XRD),scanning electron microscopy (SEM) and UV-Vis diffuse reflectance (UV-Vis DRS).The visible light photocatalytic activity of the samples was evaluated by degradating 5mg/L rhodamine B as simulated contaminant.The results show that the TiOF2 shows a flower like shape with different grades,while the TiOF2-OH shows a tube bundle shape.The crystallinity of TiOF2 was not improved by hydroxylation treatment but its response to visible light was enhanced effectively.The as-prepared TiOF2-OH could completely degraded the pollutants within 4 hours.
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基金资助
陕西省工业攻关项目(2014GY2-07);陕西省教育厅项目(15JK1460)
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