A novel structured material, aluminum hydroxide–coated nanoscale zero-valent iron ([email protected](OH)₃), was synthesized to improve the applicability of NZVI in environmental remediation. Using a rate-control precipitation method, the surface of NZVI was covered with a thin shell of amorphous Al(OH)₃. ζ-potential of NZVI under a weak alkaline condition became positive after coating with the Al(OH)₃ shell. [email protected](OH)₃ performed remarkably higher suspension stability in aqueous phase than bare NZVI, owing to the increased electrostatic repulsion and the reduction of magnetic attraction between the [email protected](OH)₃ particles. Results of H₂ generation test indicated that the pH buffering capacity of the Al(OH)₃ shell and the enlarged surface area benefitted the reductive reactivity of [email protected](OH)₃. Additionally, the adsorption capability of the positive Al(OH)₃ shell facilitated the reduction and detoxification of contaminants on the NZVI surface. Consequently, the core-shell structure dependent modification with a thin inorganic shell with multiple functions is a promising design for environmental nanomaterials, and the [email protected](OH)₃ synthesized in this study is a feasible and environmentally benign material for environmental remediation.

合成了一种新型结构材料，即氢氧化铝涂层的纳米零价铁（[受电子邮件保护]（OH）₃），以提高NZVI在环境修复中的适用性。使用速率控制沉淀法，NZVI的表面覆盖有非晶态Al（OH）_3的薄壳。涂有Al（OH）₃壳层后，弱碱性条件下NZVI的ζ电位变为正。[email protected]（OH）₃在水相中的悬浮稳定性显着高于裸NZVI，这归因于静电排斥力的增强和[email protected]（OH）₃颗粒之间的磁引力的降低。H _2的结果生成试验表明，Al（OH）₃壳的pH缓冲能力和增大的表面积有利于[email protected]（OH）₃的还原反应。此外，正极Al（OH）₃壳的吸附能力有助于减少和清除NZVI表面上的污染物。因此，具有多种功能的无机薄壳对核-壳结构的依赖修饰是一种有前景的环境纳米材料设计，本研究合成的[email protected]（OH）₃是一种可行且对环境有益的环境修复材料。