化工进展 ›› 2023, Vol. 42 ›› Issue (6): 2975-2986.DOI: 10.16085/j.issn.1000-6613.2022-1395

• 材料科学与技术 • 上一篇    下一篇

改性纳米零价铁材料制备的研究进展

杨竞莹1(), 施万胜1, 黄振兴1,2, 谢利娟1, 赵明星1,2(), 阮文权1,2   

  1. 1.江南大学环境与土木工程学院,江苏 无锡 214122
    2.江苏省生物质能与减碳技术工程实验室,江苏 无锡 214122
  • 收稿日期:2022-07-26 修回日期:2022-09-26 出版日期:2023-06-25 发布日期:2023-06-29
  • 通讯作者: 赵明星
  • 作者简介:杨竞莹(1998—),女,硕士研究生,主要研究方向为环境化学技术。E-mail:2220954965@qq.com
  • 基金资助:
    国家自然科学基金(31971385)

Research progress on the preparation of modified nano zero-valent iron materials

YANG Jingying1(), SHI Wansheng1, HUANG Zhenxing1,2, XIE Lijuan1, ZHAO Mingxing1,2(), RUAN Wenquan1,2   

  1. 1.School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
    2.Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
  • Received:2022-07-26 Revised:2022-09-26 Online:2023-06-25 Published:2023-06-29
  • Contact: ZHAO Mingxing

摘要:

纳米零价铁(nZVI)是一种具有发展潜力的材料,但是过高的活性导致其易在空气、水中腐蚀,形成的钝化层覆盖在颗粒表面使得活性位点减少。研究表明,对nZVI进行改性可减少其氧化、钝化、团聚等问题。本文主要介绍了包覆、负载、双金属、硫化四种改性方式,探讨改性后nZVI性能强化机制,分析在应用中存在的问题,并提出相关建议。通过多种改性方式制备的nZVI复合材料,不仅能够减缓nZVI的团聚,提高对目标污染物的处理效果,而且能减弱nZVI的生物毒性。纳米颗粒的尺寸、改性材料的稳定性等问题是未来研究的重点内容之一。

关键词: 纳米零价铁, 复合材料, 团聚, 稳定性, 反应活性

Abstract:

Nano zero-valent iron (nZVI) has been considered to be one of the potential materials, however, its high activity makes it easy to corrosion in air and water and the formed passivation layer covering the surface of particle leads to reduction of the active sites. The researches indicate that the problem of oxidation, passivation and agglomeration of nZVI can be reduced by the modification method. This paper mainly introduces the coating, loading, bimetallic and sulphurization four modification methods, and the enhancement mechanism of modified nZVI is discussed. The application problem of modified nZVI is indicated and relevant suggestions are given for the problems. The nZVI composites prepared by various modification methods can not only reduce the agglomeration and improve the treatment effect of target pollutants, but also can solve the potential problems of biotoxicity. It also suggestes that one of the future research points is the size of nanoparticles and the stability of modified materials.

Key words: nano zero-valent iron, composites, agglomeration, stability, reactivity

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