Insight on the Ultrafast Water Treatment over NiFe-Layered Double Hydroxides via Electroactivation of Ferrate(VI): The Role of Spin State Regulation

IF 1.4 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2025-05-01 DOI:10.3390/w17091369

Xinyu Gai, Ningxuan Xue, Pengxiang Qiu, Yiyang Chen, 大介伊藤, Zhi‐Hui Zhang, Fengling Liu, Zhong‐Yi Liu, Zhaobing Guo

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引用次数: 2

Abstract

Ferrate (Fe(VI)), an emerging green oxidant and disinfectant in water treatment, faces challenges due to its limited reaction efficiency stemming from a highly electron-deficient state. To address this, we designed NiFe-Layered Double Hydroxides (NiFe-LDHs) with different spin states to enhance electron transfer efficiency in Fe(VI)-mediated advanced oxidation processes (AOPs). We hypothesized that fine-tuning the spin state of NiFe-LDHs could optimize the balance between adsorption capabilities and electronic structure regulation. Our experiments revealed that intermediate-spin NiFeLDH-1, with a magnetic moment of 0.67 μB, exhibited the best catalytic performance, achieving 100% phenol removal. The NiFeLDH-x/Fe(VI) system demonstrated a significant synergistic enhancement in degradation efficiency. In addition, NiFeLDH-1 showed excellent performance in stability and continuous flow experiments. This study unveils a novel correlation between spin polarization and catalytic efficiency, offering insights into the optimization of electrocatalysts for Fe(VI)-mediated AOPs. The findings suggest that spin state modulation is a promising strategy to enhance the electrocatalytic activity and stability of non-noble metal catalysts.

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电活化高铁酸盐（VI）对nife层双氢氧化物的超快水处理：自旋态调节的作用

高铁酸盐（Fe(VI)）是一种新兴的绿色氧化剂和水处理消毒剂，由于其高度缺电子状态导致反应效率有限，因此面临挑战。为了解决这个问题，我们设计了具有不同自旋态的nife层状双氢氧化物（NiFe-LDHs），以提高Fe（VI）介导的高级氧化过程（AOPs）中的电子转移效率。我们假设微调nfe - ldhs的自旋状态可以优化吸附能力和电子结构调节之间的平衡。实验结果表明，中旋NiFeLDH-1的磁矩为0.67 μB，催化性能最好，可达到100%的苯酚脱除效果。NiFeLDH-x/Fe（VI）体系在降解效率方面表现出显著的协同增强作用。此外，NiFeLDH-1在稳定性和连续流动实验中表现出优异的性能。该研究揭示了自旋极化与催化效率之间的新相关性，为Fe（VI）介导的AOPs电催化剂的优化提供了见解。研究结果表明，自旋态调制是提高非贵金属催化剂电催化活性和稳定性的一种很有前途的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).

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methyl phenyl sulfoxide oxide

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2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonate)
30931-67-0

￥30.00-￥14741.00

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