Interfacial Charge-Modulated Multifunctional MoS 2 /Ti 3 C 2 T x Penetrating Electrode for High-Efficiency Freshwater Production

作者：Hantong Qie, Meng Liu, Xinping Fu, Xiao Tan, Yu Zhang, Meng Ren, Yinjie Zhang, Yuansheng Pei, Aijun Lin, Beidou Xi, Jun Cui · 发表于：ACS Nano · 年份：2022 · DOI：10.1021/acsnano.2c07810 · 被引用次数：31 · 研究领域：Membrane-based Ion Separation Techniques、Membrane Separation Technologies、Energy Harvesting in Wireless Networks

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.