Iron-based materials are effective for the reductive removal of the disinfection byproduct bromate in water, while the construction of highly stable and active Fe-based materials with wide pH adaptability remains greatly challenging. In this study, highly dispersed iron phosphide-decorated porous carbon (Fe₂P(x)@P(z)NC-y) was prepared via the thermal hydrolysis of Fe@ZIF-8, followed by phosphorus doping (P-doping) and pyrolysis. The reduction performances of Fe₂P(x)@P(z)NC-y for bromate reduction were evaluated. Characterization results showed that the Fe, P, and N elements were homogeneously distributed in the carbonaceous matrix. P-doping regulated the coordination environment of Fe atoms and enhanced the conductivity, porosity, and wettability of the carbonaceous matrix. As a result, Fe₂P(x)@P(1.0)NC-950 exhibited enhanced reactivity and stability with an intrinsic reduction kinetic constant (k_int) 1.53–1.85 times higher than Fe(x)@NC-950 without P-doping. Furthermore, Fe₂P(0.125)@P(1.0)NC-950 displayed superior reduction efficiency and prominent stability with very low Fe leaching (4.53–22.98 μg L^–1) in a wide pH range of 4.0–10.0. The used Fe₂P(0.125)@P(1.0)NC-950 could be regenerated by phosphating, and the regenerated Fe₂P(0.125)@P(1.0)NC-950 maintained 85% of its primary reduction activity after five reuse cycles. The study clearly demonstrates that Fe₂P-decorated porous carbon can be applied as a robust and stable Fe-based material in aqueous bromate reduction.

中文翻译：

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MOF 衍生的磷掺杂铁碳复合材料用于溴酸盐还原的鲁棒活性和稳定性

铁基材料可以有效还原去除水中消毒副产物溴酸盐，但构建具有宽pH适应性的高稳定性、高活性的铁基材料仍然具有很大的挑战性。本研究通过Fe@ZIF-8的热水解，然后进行磷掺杂（P-掺杂）制备了高度分散的磷化铁修饰的多孔碳（Fe ₂ P( x )@P( z )NC- y ）。和热解。评价了Fe ₂ P( x )@P( z )NC- y还原溴酸盐的性能。表征结果表明，Fe、P、N元素均匀分布在碳质基体中。 P掺杂调节Fe原子的配位环境，增强碳质基体的导电性、孔隙率和润湿性。结果，Fe ₂ P( x )@P(1.0)NC-950表现出增强的反应活性和稳定性，其固有还原动力学常数( k _int )比不含P-的Fe( x )@NC-950高1.53–1.85倍。兴奋剂。此外，Fe ₂ P(0.125)@P(1.0)NC-950在 4.0-10.0 的宽 pH 范围内表现出优异的还原效率和显着的稳定性，Fe 浸出量极低 (4.53-22.98 μg L ^–1 )。使用过的Fe ₂ P(0.125)@P(1.0)NC-950可通过磷化再生，再生后的Fe ₂ P(0.125)@P(1.0)NC-950重复使用5次后仍能保持85%的初次还原活性循环。该研究清楚地表明，Fe ₂ P 修饰的多孔碳可以作为坚固且稳定的铁基材料应用于溴酸盐水溶液还原中。