Synergistic Acid‐Base Action Leads to Ultrafast Decontamination of Nerve and Blister Agents by OH − Intercalated Zr 4+ ‐Doped MgAl‐LDH under Ambient Conditions

Abstract Developing materials capable of rapidly decontaminating nerve and blister agents directly under ambient conditions are crucial for practical applications. In this work, Mg 3 Al 1‐ x Zr x ‐LDH with different Zr 4+ doping contents and corresponding OH − intercalated materials Mg 3 Al 1‐ x Zr x ‐LDH‐OH are synthesized. First, they are used for the decontamination of nerve agents under ambient conditions, showing that increasing the Zr 4+ doping amount accelerates the decontamination rate of diethyl cyanophosphonate (DECP) and soman (GD), with the half‐life of DECP and GD being 3–5 times shorter with Mg 3 Al 0.6 Zr 0.4 ‐LDH (the highest Zr 4+ doping content) compared to Mg 3 Al 1 ‐LDH. Notably, the intercalation of OH − in Mg 3 Al 0.6 Zr 0.4 ‐LDH further greatly enhances the catalytic activity for DECP and GD, the reaction half‐life of DECP and GD with Mg 3 Al 0.6 Zr 0.4 ‐LDH‐OH being 18 s and <15 s, respectively, which is the shortest recorded so far. Additionally, under ambient conditions, Mg 3 Al 0.6 Zr 0.4 ‐LDH‐OH exhibits superior detoxification performance for mustard gas (HD) compared to Mg 3 Al 0.6 Zr 0.4 ‐LDH, with 92.8% of HD being removed within 6 h. Mechanistic studies reveal that Mg 3 Al 0.6 Zr 0.4 ‐LDH‐OH efficiently decontaminates nerve and blister agents utilizing the synergistic effect of Lewis acid‐base sites (Zr 4+ and laminate OH groups) and interlayer OH − . To extend the practical applications of the materials, PVA@(PAN/LDH‐OH) self‐detoxifying fiber loaded with Mg 3 Al 0.6 Zr 0.4 ‐LDH‐OH is prepared.