Membrane distillation can use low-grade heat for salt water desalination, but the materials used can often suffer from limited permeance. Here, a strategy is proposed to construct a pore surface and size functionality gradient in a covalent organic framework, enabling a flux of 600 l m–2 h–1 with NaCl rejection of 99.99%.
- Shuang Zhao
- Chenghao Jiang
- Bo Wang
