Achieving 9.11 GHz broadband microwave absorption in CeO₂/Sn@C composites via Sn doping and structural modulation - Yecheng Qiu; Hao Ma; Jinhua Du; Wei Li; Xiaolong Wang; Yizhe Tian; Xu Mu; Defang Duan; Yingnan Wang (Chemical Engineering Journal, 2026)