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载铁催化水解离中间层及双极膜性能研究

作者：杨蕊，范云双，吴秀翠，王杰

单位：天津工业大学环境科学与工程学院

关键词：双极膜；埃洛石纳米管；水解离；金属离子

DOI号： 10.16159/j.cnki.issn1007-8924.2025.01.007

分类号： TQ028.8

出版年,卷(期):页码： 2025,45(1):58-69

摘要：

研究了埃洛石纳米管（HNTs）和含铁化合物在双极膜（BPM）界面层中对水解离的影响.采用流延法将FeCl3掺杂的改性埃洛石纳米管（FeCl3-HNTs）作为中间层进行双极膜的制备，并与空白双极膜、HNTs-BPM及商业双极膜进行对比，探究不同双极膜的性能.通过FTIR、XPS、SEM和EDS等表征研究了中间层材料的化学组成和结构；通过I~V曲线、EIS、稳定性和产酸碱情况对双极膜进行性能测试.结果表明，与空白样品相比，在电流密度为50 mA/cm2条件下，FeCl3-HNTs-BPM的跨膜电压降低了46%，180 min后H+和OH-浓度分别达到0.215 mol/L和0.225 mol/L，电流效率为81.2%，能耗为3.36 kW·h/kg；在24 h的监测下双极膜的电压变化幅度较小（1.16 V到1.25 V），具有良好的电压稳定性，且未出现分层现象，表明FeCl3-HNTs作为中间层制备的双极膜有良好的应用前景.

The work in this paper examined the effect of halloysite nanotubes (HNTs) and iron metal compounds in the interface layer (IL) of the bipolar membrane (BPM) on water dissociation. The modified BPM was prepared by casting method with the HNTs and iron metal compounds (FeCl3-HNTs) fixed in the IL and compared with blank bipolar membrane, HNTs-BPM and commercial bipolar membrane to explore the performance of different BPM. The chemical composition and structure of the catalyst compounds were confirmed through FTIR, XPS, SEM and EDS. BPM were characterized by I~V curve, EIS, stability and electrodialysis. The results indicated that the water dissociation voltage of FeCl3-HNTs was reduced by 46% compared with the blank sample, the H+ and OH- concentrations after 180 min were 0.215 mol/L, 0.225 mol/L, respectively at 50 mA/cm2, the current efficiency was 81.2 % and the energy consumption was 3.36 kW·h/kg. The voltage change of BPM under 24 h monitoring is small (1.16 V to 1.25 V), with good voltage stability and no delamination phenomenon, indicating that FeCl3-HNTs as an intermediate layer have good prospects for application.

基金项目：

作者简介：

杨蕊（2000-），女，河北衡水人，硕士生，研究方向为双极膜的制备与性能研究

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