A novel CdS nanoparticles/hollow hydroxyapatite microsphere (CdS/HAP) photocatalysts, with excellent photocatalytic performance, was firstly prepared by using a facile hydrothermal method under low temperature. The CdS/HAP composite catalysts were explored by various techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), Brunauer Emmett-Teller (BET) and photoelectrochemical measurements. The photocatalytic ability of the as-prepared composite catalysts was investigated by using tetracycline (TC) as a model contaminant. Compared to pure CdS and HAP, the CdS (10 wt.%)/HAP composite exhibited much higher photocatalytic removal efficiency with 90.2% degradation of TC in 30 min, where the best conditions were an initial pH at 5 and catalyst dosage of 0.50 g/L. Moreover, a probable reaction mechanism of CdS/HAP composite was evaluated based on the analysis of electron spin resonance (ESR) and trapping experiments. It was worth pointing out that the CdS nanoparticles can promote the photo-generated charges separation of HAP microspheres, and thus to improve the photocatalytic degradation performance of the catalysts. It can be inferred that the CdS/HAP composite's photocatalytic superiority could be used for applications in the removal of many hazard pollutants.

首先采用低温水热法制备了具有优异光催化性能的新型CdS纳米粒子/空心羟基磷灰石微球（CdS / HAP）光催化剂。通过各种技术探索CdS / HAP复合催化剂，包括X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），紫外可见漫反射光谱（DRS），X射线光电子光谱（ XPS），Brunauer Emmett-Teller（BET）和光电化学测量。使用四环素（TC）作为模型污染物，研究了所制备复合催化剂的光催化能力。与纯CdS和HAP相比，CdS（10 wt。％）/ HAP复合材料在30分钟内显示出更高的光催化去除效率，TC降解了90.2％，最佳条件是初始pH为5，催化剂用量为0.50 g / L。此外，基于电子自旋共振（ESR）分析和捕获实验，评估了CdS / HAP复合材料可能的反应机理。值得指出的是，CdS纳米颗粒可以促进HAP微球的光生电荷分离，从而提高催化剂的光催化降解性能。可以推断，CdS / HAP复合材料的光催化优势可用于去除许多有害污染物。值得指出的是，CdS纳米颗粒可以促进HAP微球的光生电荷分离，从而提高催化剂的光催化降解性能。可以推断，CdS / HAP复合材料的光催化优势可用于去除许多有害污染物。值得指出的是，CdS纳米颗粒可以促进HAP微球的光生电荷分离，从而提高催化剂的光催化降解性能。可以推断，CdS / HAP复合材料的光催化优势可用于去除许多有害污染物。