Micro-/Macroscopically Synergetic Control of Switchable 2D/3D Photothermal Water Purification Enabled by Robust, Portable, and Cost-Effective Cellulose Papers

under 1 sun via an alternative kirigami/origami approach. Significantly, the PPyP can realize a switchable transformation between 2D and 3D structures to adapt diverse environments, demonstrating significant potentials in environmentally adaptable water purification.