Intimately coupled photocatalysis and biodegradation (ICPB) is an attractive wastewater treatment technology, and the key to a successful ICPB is a carrier capable of accumulating biofilm inside and adhering photocatalyst firmly on its exterior. However, the photocatalysts coated on the carrier by the conventional method not only occupy the internal pores which should be left for microorganism loading, but also possess an insufficient adhesion to the carrier. To solve this problem, a powder spraying method has been proposed for the first time, which allows the photocatalyst to adhere more firmly on the exterior surface of the carrier, and to reserve the inside pore structures for biofilm accumulation. In the end, when using visible-light-induced ICPB (called VPCB), the degradation rate of tetracycline hydrochloride achieved 97.2%, and the stability of recycled carrier was still excellent even after 6 cycles of operation. This work provides a novel avenue for the design of a highly stable ICPB system with low-cost and high degradation efficiency.

紧密耦合的光催化和生物降解（ICPB）是一种有吸引力的废水处理技术，而成功实现ICPB的关键是能够在内部积聚生物膜并将光催化剂牢固地粘附在其外部的载体。然而，通过常规方法涂覆在载体上的光催化剂不仅占据了应留给微生物负载的内部孔，而且与载体的粘附性不足。为了解决这个问题，首次提出了一种粉末喷涂方法，该方法允许光催化剂更牢固地粘附在载体的外表面上，并保留内部孔结构用于生物膜的积累。最后，当使用可见光诱导的ICPB（称为VPCB）时，盐酸四环素的降解率达到97.2％，即使经过6个循环的操作，回收的载体的稳定性仍然极好。这项工作为设计具有低成本和高降级效率的高度稳定的ICPB系统提供了一条新颖的途径。