Enhancing silver nanoparticle dissolution in chloride media by cupric ions

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Nanoparticle Research Pub Date : 2025-10-03 DOI:10.1007/s11051-025-06451-7

Duc Toan Nguyen, Thi Thu Ha Tran, Thi Bich Ngoc Nguyen, Thi Thuy Nguyen, Trong Nghia Nguyen, Vu Ngoc Thanh Nguyen, Thi Minh Huyen Nguyen, Thi Hong Khuat, Tra Mai Ngo, Thi Thuy Hang Nguyen, Thi Ha Lien Nghiem

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Abstract

We demonstrate that cupric ions can significantly accelerate the dissolution rate of PVP-coated silver nanoparticles (AgNPs) when dispersed in a sodium chloride solution. To assess the impact of copper ion concentration on the dissolution of PVP-coated AgNPs and the role of the chloride ion, experiments were conducted in both chloride and deionized (DI) water. In an aqueous medium without chloride ions, AgNPs remain stable despite the presence of cupric ions. However, in a chloride medium, their solubility increases in direct proportion to the cupric ion concentration. The dissolution rate of AgNPs was monitored using UV–Vis absorption spectroscopy, leveraging their plasmonic properties. This method allowed us to analyze the dissolution process of PVP-coated AgNPs in sodium chloride solution in the presence of cupric ions. Additionally, using the bathocuproine method and EDS analysis, the dissolution mechanism of AgNPs into solid silver chloride (AgCl) and cuprous ions within the sodium chloride medium containing cupric ions has been elucidated.

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铜离子促进银纳米颗粒在氯介质中的溶解

我们证明，当分散在氯化钠溶液中时，铜离子可以显著加快pvp包覆银纳米粒子（AgNPs）的溶解速度。为了评估铜离子浓度对pvp包覆AgNPs溶解的影响以及氯离子的作用，我们在氯水和去离子水中进行了实验。在没有氯离子的水介质中，尽管存在铜离子，AgNPs仍保持稳定。然而，在氯离子介质中，它们的溶解度与铜离子浓度成正比。利用AgNPs的等离子体特性，利用紫外-可见吸收光谱法监测其溶解速率。该方法允许我们分析pvp包覆AgNPs在铜离子存在下在氯化钠溶液中的溶解过程。此外，利用bathocuproine法和EDS分析，阐明了AgNPs在含铜的氯化钠介质中溶解固体氯化银（AgCl）和铜离子的机理。

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

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.