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ZnS纳米片修饰Brookite TiO2光催化降解环丙沙星性能研究
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Abstract:
采用水热法合成了板钛矿TiO2，并以此为基底与片状ZnS进行了复合，成功制备了ZnS/brookite复合材料。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外可见漫反射光谱(DRS)对制备的复合材料进行了表征测试，分析了样品的晶型组成、形貌及带隙结构。以盐酸环丙沙星(CIP)污染物，在可见光照射下测试了复合材料的光催化活性。结果表明，经可见光照射120 min，3 mol% ZnS/brookite复合材料对CIP的降解率达到78%。通过自由基捕获实验证实了h+和？O2？是该反应的主要活性物质。
Brookite TiO2 was synthesized by the hydrothermal method and then combined with flake ZnS to successfully prepare ZnS/brookite composites. The prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet-visible diffuse reflectance spectroscopy (DRS). The crystal phase composition, morphology and band gap structure of the samples were analysed. The photocatalytic activity of the composites was tested under visible light irradiation using ciprofloxacin hydrochloride (CIP) as the pollutant. The results showed that after 120 min of visible light irradiation, the degradation rate of CIP by 3 mol% ZnS/brookite composites reached 78%. The free radical capture experiment confirmed that h+ and ？O2？ were the main active substances in this reaction.
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