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Scientists at the University of Bath have developed a new photocatalyst that uses sunlight to degrade PFAS, a group of chemicals that don't break down naturally.

In this work, a synergistic MXene/(NH₄)₂SO₄ treatment strategy is proposed and systematically validated. By combining salt‐out processing based on the Hofmeister effect with a MXene-enabled conductive network, a double‐network MXene-composite hydrogel is fabricated. At an extremely low filler content (0.12 wt%), MNMSPC hydrogel exhibits an approximately threefold improvement in overall mechanical performance, including strength, toughness, and stretchability. Meanwhile, the gel achieves efficient broadband EMI shielding covering the X, Ku, Ka, and terahertz frequency bands, with a maximum shielding effectiveness exceeding 60 dB, together with excellent infrared stealth performance.