利用两步反应制备了HNTs/TiO₂/MoS₂复合材料，并通过X射线衍射仪、透射电镜、扫描电镜、紫外-可见漫反射光谱仪等对复合材料的结构形貌、化学成分以及光学性能进行了表征，并利用氯四环素（CTC）在水相中的光催化降解对制备的样品进行光催化活性的评价。结果表明，TiO₂粒子均匀地吸附在HNTs的表面，MoS₂的引入成功地扩大了TiO₂的光响应范围；与单半导体MoS₂和二元复合材料HNTs/TiO₂相比，三元复合材料HNTs/TiO₂/MoS₂具有更高的光催化活性。HNTs/TiO₂/MoS₂三元结构经过4次循环后显示出良好的光稳定性。

Halloysite nanotube/TiO₂/MoS₂ composites (HNTs/TiO₂/TiO₂) are successfully prepared by a simple two-step reaction.The structure,chemical composition and optical properties of the composites are investigated by X-ray diffraction,transmission electron microscopy,scanning electron microscopy and UV-visible diffuse reflectance spectroscopy,respectively.Photocatalytic degradation of chlorotetracycline (CTC) in aqueous phase is used to evaluate the photocatalytic activity of the prepared samples.Results show that TiO₂ nanoparticles are loaded on the surface of HNTs uniformly and the addition of MoS₂ successfully expands the light response range of TiO₂.The ternary composite HNTs/TiO₂/MoS₂ has higher photocatalytic activity than the single semiconductor MoS₂ and the binary composite HNTs/TiO₂.HNTs/TiO₂/MoS₂ ternary structure can be regenerated by washing and drying for more than four times,which is useful for practical applications.

张海楠(1994-),男,硕士研究生,研究方向为催化材料的开发与应用,1193752792@qq.com