Impact of ionization equilibrium on electrokinetic flow of weak electrolytes in nanochannels
Impact of ionization equilibrium on electrokinetic flow of weak electrolytes in nanochannels
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DOI：
10.1088/1361-6528/aac126
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发表时间：
2018-05
期刊：
影响因子：
3.5
通讯作者：
Ziwei Ji;Zhuo Huang;B. Chen;Yuhui He;M. Tsutsui;X. Miao
中科院分区：
文献类型：
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作者：
Ziwei Ji;Zhuo Huang;B. Chen;Yuhui He;M. Tsutsui;X. Miao
在最近的实验中，已经积极探索了纳米通道或纳米孔中的弱电解质传输。在本文中，我们建立了一个新的电动力学模型，其中弱电解质的电离平衡效应的概述，并进行了数值计算的H3PO4浓度偏置的纳米通道系统。通过考虑局域化学平衡在亚磷酸电离中的作用，模拟结果与实验结果定量吻合。基于该模型，我们预测，增强的能量收集能力可以通过利用弱电解质相比，传统的强电解质的方法在浓度梯度为基础的发电系统。
Weak electrolyte transport in nanochannels or nanopores has been actively explored in recent experiments. In this paper, we establish a new electrokinetic model where the ionization balance effect of weak electrolytes is outlined, and performed numerical calculations for H3PO4 concentration-biased nanochannel systems. By considering the roles of local chemical equilibrium in phosphorous acid ionization, the simulation results show quantitative agreement with experimental observations. Based on the model, we predict that enhanced energy harvesting capacity could be accomplished by utilizing weak electrolytes compared to the conventional strong electrolyte approaches in a concentration gradient-based power-generating system.