等离子体驱动的溶液电化学对金纳米粒子形成的 pH 值影响

IF 2.9 3区 物理与天体物理 Q2 PHYSICS, APPLIED
Jae Hyun Nam, Peter Bruggeman
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引用次数: 0

摘要

等离子体驱动溶液电化学为合成纳米材料提供了湿化学方法的替代方法。本研究探讨了前驱体溶液的 pH 值如何影响金纳米粒子的形成,特别是溶解电子和 H2O2 对前驱体离子的转化以及粒子大小的影响。我们的实验表明,金纳米粒子的自催化还原选择性为 43%-65%,这表明金纳米粒子可催化分解。金单体的溶解度随着 pH 值的降低而增加,这影响了成核和由此产生的颗粒大小,在 pH 值介于 3 和 5 之间时,颗粒大小分布受到很大影响。一维薄膜反应-扩散模型定量地再现和解释了实验结果,证明了 pH 值对不同等离子体生成物的影响,使金离子的转化率和成核率得以提高,这直接影响到粒度分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of the pH on the Formation of Gold Nanoparticles Enabled by Plasma‐Driven Solution Electrochemistry
Plasma‐driven solution electrochemistry offers alternatives to wet‐chemical methods for synthesizing nanomaterials. This study examines how precursor solution pH affects gold nanoparticle formation, specifically the conversion of precursor ions by solvated electrons and H2O2, and particle size. Our experiments show that –enabled autocatalytic reduction selectivity is 43%–65%, suggesting a catalytic decomposition of by gold nanoparticles. The solubility of gold monomers, increasing with decreasing pH, influences nucleation and resulting particle size, affecting the particle size distribution significantly at pH between 3 and 5. A 1‐D film reaction‐diffusion model quantitatively reproduces and explains the experimental results, demonstrating the impact of pH on different plasma‐produced species, enabling the gold ion conversion and nucleation rates, which directly impact particle size distributions.
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来源期刊
Plasma Processes and Polymers
Plasma Processes and Polymers 物理-高分子科学
CiteScore
6.60
自引率
11.40%
发文量
150
审稿时长
3 months
期刊介绍: Plasma Processes & Polymers focuses on the interdisciplinary field of low temperature plasma science, covering both experimental and theoretical aspects of fundamental and applied research in materials science, physics, chemistry and engineering in the area of plasma sources and plasma-based treatments.
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