Abstract：
The utilization of rare earth polishing powder waste (RPW) to prepare antibacterial ceramics can effectively avoid problems of pollution in the recycling process and waste of rare earth resources. Herein, a novel RPW-based antibacterial ceramics was developed, which possesses the core-shell structure with ceramics as the cores and the CeO2/BiOCl as the superficial coating. The antibacterial ceramics display notable antibacterial activity, and the inactivation rates of 3.3 log under visible light irradiation in 30 min and 2.4 log under darkness in 1 h were achieved, and the zone of inhibition values was found to be 16.6 mm for E.coil. The hardness of antibacterial ceramics was measured to be 897 (±38) HV, higher than commercial porcelain\'s hardness (600 HV). The antibacterial mechanism was verified by the Ce ion release, reactive species, and fluorescence-based live/dead cells. This study presents a novel antibacterial ceramic structure and green economic reuse method of rare earth waste.
摘要：
利用稀土抛光粉废料(RPW)制备抗菌陶瓷可有效避免稀土资源回收利用过程中的污染和浪费问题。在这里，开发了一种新型的基于RPW的抗菌陶瓷，具有以陶瓷为核心，以CeO2/BiOCl为表层的核-壳结构。抗菌陶瓷表现出显著的抗菌活性，在可见光照射下30分钟内的失活率为3.3log，在黑暗照射下1小时内的失活率为2.4log，并且发现E.coil的抑制值区域为16.6mm。测定抗菌陶瓷的硬度为897(±38)HV,高于商业瓷器的硬度(600HV)。通过Ce离子释放验证了抗菌机理,反应性物种，和基于荧光的活/死细胞。本研究提出了一种新型抗菌陶瓷结构和绿色经济的稀土废弃物再利用方法。
