Interfacial Charge-Modulated Multifunctional MoS 2 /Ti 3 C 2 T x 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 2 /Ti 3 C 2 T x -modified carbon fiber (CF/MoS 2 /Ti 3 C 2 T x ) penetrating electrode is designed. To maximize the desalination and degradation efficiencies of CF/MoS 2 /Ti 3 C 2 T x , a photocatalytic component is introduced into the membrane capacitive deionization (PMCDI) device. High desalination capability is derived from the lamellar architecture structure of MoS 2 /Ti 3 C 2 T x . Meanwhile, excellent degradation performance is due to the formation of two photoelctrocatalytic activity centers, directionally generating singlet oxygen ( 1 O 2 ) and hydroxyl radical ( • OH). The intercalated Cl - (desalination) as the electron transfer bridge optimizes the charge distribution of MoS 2 /Ti 3 C 2 T x , reinforcing the photoelectrocatalytic activity (degradation). The formation of the electron-deficient (desalination) and electron-rich (regeneration) regions at the terminated O atom of Ti 3 C 2 T x accelerate the generations of • OH and 1 O 2 , respectively. In perspective, a mutual promotion process of desalination and degradation is achieved for high-efficiency production of high-quality freshwater.