Ting Ying

Abstract Recovery of precious metals from waste has high social and economic value, but in practice, recycling is often inefficient due to limits in technologies and materials. Here we show a group of materials—two-dimensional (2D) metallic 1 T/1 T′ phase transition metal dichalcogenides (TMDs, MoS2, WS2, TaS2, and TiS2)—that allows for efficient, selective, and scalable extraction of valuable gold (Au) from leaching solutions of end-of-life electronics.

Abstract Ferroptosis, an iron-dependent form of oxidative cell death, has emerged as a key driver of osteoarthritis, yet therapeutic strategies remain limited by the inability to safely eliminate iron–chelate complexes after treatment. Their local accumulation can lead to secondary iron release, oxidative stress, and sustained tissue damage. This study presents a hydrogel-based system that enables selective recognition and removal of these complexes through engineered molecular “memory” sites.