Excellent long-term reactivity of inhomogeneous nanoscale Fe-based metallic glass in wastewater purification

  • Shuang-Qin Chen (陈双琴)
  • Ke-Zhen Hui (惠可臻)
  • Liang-Zheng Dong (董梁正)
  • Zhun Li (李准)
  • Qing-hua Zhang (张庆华)
  • Lin Gu (谷林)
  • Wei Zhao (赵威)
  • Si Lan (兰司)
  • Yubin Ke (柯于斌)
  • Yang Shao (邵洋)Email author
  • Horst Hahn
  • Ke-Fu Yao (姚可夫)Email author


Metallic glasses (MGs) have attracted great attention in wastewater treatment because of their high reactivity arising from amorphous structure, large residual stress and high density of low coordination sites. However, the reactivity of MGs would gradually slow down with time due to the passivation of active sites by corrosion products, resulting in limited long-term reactivity, which is also an unsolved key issue for established crystalline zero valent iron (ZVI) technology. Here, such problems are successfully overcome by introducing nanoscale chemical inhomogeneities in Fe-based MG (Fe-MGI), which apparently contributes to local galvanic cell effect and accelerates electron transfer during degradation process. More importantly, the selective depletion of Fe0 causes local volume shrinkage and crack formation, leading to self-peeling of precipitated corrosion products and reacted regions. Thereby fresh low coordination sites could be continuously provided, counteracting the mass transport and reactivity deteriorating problem. Consequently, Fe-MGI demonstrates excellent long-term reactivity and self-refreshing properties even in neutral solution. The present results provide not only a new candidate but also a new route of designing ZVI materials for wastewater treatment.


Fe-based metallic glass inhomogeneity self-refreshing wastewater treatment catalysis 

纳米尺度非均匀性诱导自更新铁基非晶合金具有 优异的长期反应活性


铁基非晶合金作为亚稳态新型零价铁, 具有高活性亚稳态结 构、较大的残余应力和高密度低配位点等特性, 在催化和废水处 理中引起了广泛的关注; 但由于腐蚀产物沉淀覆盖活性位点, 非晶 合金的反应活性随着时间的推移而逐渐降低, 导致耐用性差. 腐蚀 产物沉淀造成长期反应活性降低也是阻碍传统晶态零价铁技术在 废水处理领域应用的主要问题之一. 本文通过在铁基非晶合金中 引入纳米尺度的化学不均匀性, 有助于构成局部原电池效应, 加速 电子在降解过程中的转移, 可以有效地克服这一问题. 更重要的是, 非晶合金中的零价铁被选择性腐蚀/脱合金, 导致反应区域局部体 积收缩和裂纹形成, 裂纹扩展使沉淀腐蚀产物和反应区域自剥落. 因此, 可以连续提供新的低配位, 消除质量传递和反应活性恶化的 问题. 本文所制备的具有成分不均匀的铁基非晶合金即使在中性 溶液中也具有良好的长期反应活性和自更新性能. 研究结果不仅 为废水处理提供了一种新材料, 而且为设计高活性零价铁材料提 供了一种新思路.



This work was financially supported by the National Natural Science Foundation of China (NSFC, 51871129 and 51571127), the National Key Basic Research and Development Programme (2016YFB0300502), and the Natural Science Foundation of Jiangsu Province (BK20190480). The author Chen SQ appreciates the help from Heng-Wei Luan, Jia-Cheng Ge, Si-Nan Liu and Dr. Sudheer Kumar Yadav.

Supplementary material

40843_2019_1205_MOESM1_ESM.pdf (2.2 mb)
Supporting information is available in the online version of the paper.


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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Shuang-Qin Chen (陈双琴)
    • 1
    • 2
  • Ke-Zhen Hui (惠可臻)
    • 1
  • Liang-Zheng Dong (董梁正)
    • 1
  • Zhun Li (李准)
    • 3
  • Qing-hua Zhang (张庆华)
    • 4
  • Lin Gu (谷林)
    • 4
  • Wei Zhao (赵威)
    • 1
  • Si Lan (兰司)
    • 2
  • Yubin Ke (柯于斌)
    • 6
  • Yang Shao (邵洋)
    • 1
    Email author
  • Horst Hahn
    • 2
    • 5
  • Ke-Fu Yao (姚可夫)
    • 1
    Email author
  1. 1.School of Material Science and EngineeringTsinghua UniversityBeijingChina
  2. 2.Herbert Gleiter Institute of NanoscienceNanjing University of Science and TechnologyNanjingChina
  3. 3.China Iron & Steel Research Institute Group100081China
  4. 4.Beijing Laboratory for Electron MicroscopyInstitute of Physics, CAS100190China
  5. 5.Institute of NanotechnologyKarlsruhe Institute of TechnologyEggenstein-LeopoldshafenGermany
  6. 6.China Spallation Neutron Source, Institute of High Energy PhysicsChinese Academy of SciencesDongguanChina

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