Unveiling the S-scheme charge transfer in MOF-808/PPy heterojunctions for enhanced Se(IV) photoreduction and subsequent mercury capture - Yu Liang; Xueqing Zhang; Yirui Li; Xiangyu Xiao; Tingmei Ma; Xiao Mu; Jing Zhao; Jiayiwen Wang; Huanhuan Xiao; Jiaxu Zhang (Process Safety and Environmental Protection, 2026)