Interfacial Charge-Modulated Multifunctional MoS/TiCT Penetrating Electrode for High-Efficiency Freshwater Production.

Freshwater production is critical in terms of solving the global water shortage. Aiming at improving freshwater production capability and ensuring its quality, an interfacial charge-modulated MoS/TiCT-modified carbon fiber (CF/MoS/TiCT) penetrating electrode is designed. To maximize the desalination and degradation efficiencies of CF/MoS/TiCT, a photocatalytic component is introduced into the membrane capacitive deionization (PMCDI) device. High desalination capability is derived from the lamellar architecture structure of MoS/TiCT. Meanwhile, excellent degradation performance is due to the formation of two photoelctrocatalytic activity centers, directionally generating singlet oxygen (O) and hydroxyl radical (OH). The intercalated Cl (desalination) as the electron transfer bridge optimizes the charge distribution of MoS/TiCT, reinforcing the photoelectrocatalytic activity (degradation). The formation of the electron-deficient (desalination) and electron-rich (regeneration) regions at the terminated O atom of TiCT accelerate the generations of OH and O, respectively. In perspective, a mutual promotion process of desalination and degradation is achieved for high-efficiency production of high-quality freshwater.