Zhou Qingyang, Fang Zhuluni, Wang Junyi, Zhang Wenbo, Liu Yihan, Yu Miao, Ma Zhuo, Qiu Yunfeng, Liu Shaoqin
Faculty of Life Science and Medicine, School of Medicine and Health, Harbin Institute of Technology, Harbin 150080, China.
Faculty of Life Science and Medicine, School of Life Science and Technology, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2025 May 28;18(11):2544. doi: 10.3390/ma18112544.
Food spoilage caused by microbial contamination remains a global challenge, driving demand for sustainable antibacterial packaging. Conventional photocatalytic materials suffer from limited spectral response, rapid charge recombination, and insufficient reactive oxygen species (ROS) generation under visible light. Here, a Z-scheme heterojunction was constructed by coupling zeolitic imidazolate framework-8 (ZIF-8) with AgPO, achieving dual-spectral absorption and spatial charge separation. The directional electron transfer from AgPO's conduction band to ZIF-8 effectively suppresses electron-hole recombination, prolonging carrier lifetimes and amplifying ROS production (·O/·OH). Synergy with Ag release further enhances bactericidal efficacy. Incorporated into a cellulose acetate matrix (CAM), the ZIF-8/AgPO/CAM film demonstrates 99.06% antibacterial efficiency against meat surface microbiota under simulated sunlight, alongside high transparency. This study proposes a Z-scheme heterojunction strategy to maximize ROS generation efficiency and demonstrates a scalable fabrication approach for active food packaging materials, effectively targeting microbial contamination control and shelf-life prolongation.
微生物污染导致的食品腐败仍然是一个全球性挑战，这推动了对可持续抗菌包装的需求。传统的光催化材料存在光谱响应有限、电荷快速复合以及在可见光下活性氧（ROS）生成不足等问题。在此，通过将沸石咪唑酯骨架-8（ZIF-8）与AgPO耦合构建了一种Z型异质结，实现了双光谱吸收和空间电荷分离。从AgPO的导带向ZIF-8的定向电子转移有效地抑制了电子-空穴复合，延长了载流子寿命并放大了ROS生成（·O/·OH）。与Ag释放的协同作用进一步提高了杀菌效果。将其掺入醋酸纤维素基质（CAM）中，ZIF-8/AgPO/CAM薄膜在模拟阳光下对肉类表面微生物群的抗菌效率达99.06%，同时具有高透明度。本研究提出了一种Z型异质结策略以最大化ROS生成效率，并展示了一种用于活性食品包装材料的可扩展制造方法，有效地针对微生物污染控制和保质期延长。
