Line-Charge-Mediated Concentration Enrichment in Continuous Shear Flow toward Portable Membrane-Free Water Purification.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-10-20 DOI:10.1021/acs.nanolett.5c04366

Peng Huo,Wei Liu,Zhibo Gu,Moran Wang,Daosheng Deng

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引用次数: 0

Abstract

The purification and treatment of water have assumed greater significance in the context of sustainable development. Nevertheless, the conventional theory of concentration polarization inherently imposes constraints on the effective regulation and precise manipulation of ionic transport for electrochemical-based technology. In this work, we propose an extraordinary concentration enrichment mediated by a line charge down to tens of micrometers, allowing continuous extraction in shear flow. The spatiotemporal evolution of the solute concentration is experimentally observed under various applied voltages and flow rates in a microfluidic-based electrochemical device. Through numerical simulations and scaling analysis, we elucidate the trade-offs between key physical parameters to optimize enrichment performance. Furthermore, we demonstrate the cation separation in multicomponent electrolytes and the effective removal of plastic particles and cells in solutions. This portable water purification concept may extend options for drinking water access in disaster response or infrastructure-constrained environments.

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连续剪切流中线电荷介导的浓度富集用于便携式无膜水净化。

水的净化和处理在可持续发展方面具有更大的意义。然而，传统的浓度极化理论固有地限制了电化学技术对离子输运的有效调控和精确操纵。在这项工作中，我们提出了一个特殊的浓度富集介导的线电荷到几十微米，允许在剪切流中连续提取。在微流控电化学装置中，实验观察了不同施加电压和流速下溶质浓度的时空变化。通过数值模拟和结垢分析，我们阐明了优化富集性能的关键物理参数之间的权衡。此外，我们还证明了阳离子在多组分电解质中的分离以及溶液中塑料颗粒和细胞的有效去除。这种便携式水净化概念可以扩大灾害应对或基础设施受限环境中饮用水获取的选择。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.