放电等离子烧结
材料科学
陶瓷
电化学
膜
密度泛函理论
化学工程
电催化剂
复合数
电极
复合材料
化学
物理化学
计算化学
工程类
生物化学
作者
Kuanchang He,Wei Li,Longxiang Tang,Lingyu Chen,Gang Wang,Qian Liu,Xiaodong Xin,Yang Cao,Zhenbei Wang,Sihao Lv,Defeng Xing
标识
DOI:10.1016/j.apcatb.2023.123077
摘要
Efficient refractory organic compound (ROC) removal through Ti4O7 ceramic membrane in electrochemical advanced oxidation processes (EAOPs) requires high electrochemical reactivity and stability. Herein, we report on the synthesis and properties of Ti3C2 MXene-doped Ti4O7 ceramic membranes (Ti3C2@Ti4O7) using a spark plasma sintering system, after employing density functional theory calculations to design the electrocatalyst. Doping with Ti3C2 MXene resulted in interfacial Ti–O–Ti chemical bond formation, which greatly improved the electronic structure and the generation of hydroxyl radicals (•OH). Compared with pristine Ti4O7, the charge-transfer resistance of Ti3C2@Ti4O7 decreased from 59.09 to 4.21 Ω, and the •OH generation rate enhanced 2.3 − 2.6-fold. Ti3C2@Ti4O7 could effectively remove 1,4-Dioxane from natural groundwater, and the residual 1,4-Dioxane concentration met the requirements for drinking water. Our study provides a proof-of-concept demonstration using Ti3C2 MXene to manufacture a doped Ti4O7 ceramic membrane for effective ROC removal. The theoretical predictions from this study can inspire novel electrocatalyst designs for EAOPs.
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