Delicate design of hierarchical and porous nanoarchitectures has become a highly effective strategy to develop novel bimetallic catalyst with improved stability and catalytic performance. Herein, a core-shell hierarchical 4A zeolite/Fe@Cu Fenton-like catalyst with 4A zeolite/Fe as core components and two-dimensional Cu hydroxide nanosheets assemblies as shell structure was fabricated through a simple and scalable approach and used for phenol degradation. The results indicated that 4A zeolite/Fe@Cu bimetallic catalyst had higher catalytic activity and utilization efficiency of H₂O₂ than that of 4A zeolite/Fe and 4A zeolite@Cu monometallic catalysts at near neutral pH. In the presence of H₂O₂, the 4A zeolite/Fe@Cu bimetallic catalyst could remove 95.3 % phenol after 4 h at pH 5, which was much higher than that of monometallic catalyst under the same condition. The enhanced activity of 4A zeolite/Fe@Cu was ascribed to the synergistic effect between the 4A zeolite/Fe (core) and two-dimensional Cu hydroxide nanosheets (shell). More importantly, the copper hydroxide nanosheets with open network structure on the surface of 4A zeolite/Fe@Cu improved the stability of the Fe(III) at acidic conditions, and avoided reduced catalytic efficiency of Fe(III) caused by embedding effect. This strategy provided guidance to the design of high-performance bimetallic Fenton-like catalysts.

Delicate design of hierarchical and porous nanoarchitectures has become a highly effective strategy to develop novel bimetallic catalyst with improved stability and catalytic performance. Herein, a core-shell hierarchical 4A zeolite/Fe@Cu Fenton-like catalyst with 4A zeolite/Fe as core components and two-dimensional Cu hydroxide nanosheets assemblies as shell structure was fabricated through a simple and scalable approach and used for phenol degradation. The results indicated that 4A zeolite/Fe@Cu bimetallic catalyst had higher catalytic activity and utilization efficiency of H₂O₂ than that of 4A zeolite/Fe and 4A zeolite@Cu monometallic catalysts at near neutral pH. In the presence of H₂O₂4A沸石/ Fe @ Cu双金属催化剂在pH为5的条件下反应4 h后能去除95.3％的苯酚，远高于相同条件下的单金属催化剂。4A沸石/ Fe @ Cu活性的提高归因于4A沸石/ Fe（核）和二维氢氧化铜纳米片（壳）之间的协同作用。更重要的是，在4A沸石/ Fe @ Cu表面具有开放网络结构的氢氧化铜纳米片提高了Fe（III）在酸性条件下的稳定性，并避免了由于嵌入效应而降低的Fe（III）催化效率。该策略为高性能双金属类芬顿催化剂的设计提供了指导。