ZnO/碳纳米管复合光催化材料对抗生素的光催化降解

摘要

ZnO/CNTs composite photocatalysts were prepared via a sol method. The product was characterized by X-ray diffraction(XRD) .scanning electron microscopy(SEM) ,and ultraviolet and visible diffuse reflectance spectra( UV-Vis DRS). The photocatalytic activity of the prepared catalysts was evaluated by the photoeatalytic degradation of tetracyciine hydrochloride under a xenon lamp (λ =250 ~800 nm) irradiation. The photocatalytic degradation ability of antibiotic by ZnO/CNTs composite photocatalysts has been compared with that of pure ZnO, photocatalytic activity of reused sample was also investigated. The results showed that composite material was obtained, which with ZnO nanoparticles uniformly and densely coated on the carbon nanotubes surface. Attributed to the excellent adsorption ability,photocatalytic activi ty of ZnO/CNTs was higher than that of pure ZnO. The photocatalytic degradation of tetracyciine hydro- chloride achieved 82.38% in 2 h under the irradiation of xenon lamp light 300 W. The prepared samples also showed ability for photocorrosion suppression.%采用溶胶法合成了ZnO/碳纳米管复合光催化材料,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射吸收光谱(UV-Vis)等手段对复合催化剂进行了表征.以氙灯(250～800 nm)为光源,盐酸四环紊为降解对象,评价样品的光催化活性.比较ZnO/CNTs复合材料和纯ZnO对抗生素的降解能力,并考察光催化剂的重复利用能力.结果表明,通过溶胶法得到了在碳纳米管表面均匀、致密包覆ZnO颗粒的复合材料.由于ZnO/CNTs材料良好的吸附性能,其光催化活性高于纯ZnO,在300 W氙灯光源下反应2h,对盐酸四环素的降解率达82.38％,同时复合材料显示了抑制ZnO光蚀的能力.