High-Performance Membrane Capacitive Deionization\nBased on Metal−Organic Framework-Derived Hierarchical Carbon\nStructures

Abstract

Membrane capacitive\ndeionization (MCDI) is a simple and highly\nenergy efficient method to convert brackish water to clean water.\nIn this work, a high-performance MCDI electrode architecture, which\nis composed of three-dimensional graphene networks and metal–organic\nframeworks (MOFs)–derived porous carbon rods, was prepared\nby a facile method. The obtained electrode material possesses not\nonly the conducting networks for rapid electron transport but also\nthe short diffusion length of ions, which exhibits excellent desalination\nperformance with a high salt removal capacity, i.e., 37.6 mg g^–1 at 1.2 V in 1000 mg L^–1 NaCl solution.\nThis strategy can be extended to other MOF-derived MCDI electrodes.