A novel Pac-Man structured Cu-Fe bimetallic catalyst for enhanced PAA activation: Unveiling the critical role of sulfur species in tetracycline hydrochloride degradation - Zichen Cao; Yan Zhao; Qingqing Li; Fanyue Meng; Mengzhu Yu; Songshan Cao; Guanghong Sheng; Dongdong Ren; Bing Song (Journal of Environmental Management, 2025)