膜科学与技术

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Iron-carrying catalytic hydrolysis dissociation interlayer and bipolar membrane performance study

Authors： YANG Rui, FAN Yunshuang, WU Xiucui, WANG Jie

Units： School of Environmental Science and Engineering, Tiangong University

KeyWords： bipolar membrane; halloysite nanotube; hydrolysis; metal ions

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2025,45(1):58-69

Abstract：

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.

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AuthorIntro：

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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