MXene/Polydopamine as interfacial layers for enhancing the water dissociation within bipolar membranes

IF 4.1 2区工程技术 Q2 ENGINEERING, CHEMICAL Chemical Engineering Science Pub Date : 2025-03-13 DOI:10.1016/j.ces.2025.121487

Yuting Yuan, Xu Zhang, Li Liu, Haofan Wang, Zhiqi Bao, Yahua Liu, Chenxiao Jiang, Bin Wu

{"title":"MXene/Polydopamine as interfacial layers for enhancing the water dissociation within bipolar membranes","authors":"Yuting Yuan, Xu Zhang, Li Liu, Haofan Wang, Zhiqi Bao, Yahua Liu, Chenxiao Jiang, Bin Wu","doi":"10.1016/j.ces.2025.121487","DOIUrl":null,"url":null,"abstract":"Bipolar membrane electrodialysis (BMED) efficiently transforms salts into acids and bases, with bipolar membranes (BPMs) playing a pivotal role. This study pioneers high-performance BPMs via a layer-by-layer casting/spraying technique, incorporating sulfonated polysulfone cation-exchange layers, polydopamine-modified MXene (PDA-Ti3C2TX) interfacial layers, and quaternized polyphenylene oxide anion-exchange layers. PDA-Ti3C2TX exhibits remarkable catalytic activity, promoting water dissociation. The BPMs exhibit exceptional interfacial compatibility, alkali resistance, and long-term durability. At 80 mA · cm−2, the BPMs manifest reduced transmembrane voltages (1.54 ∼ 2.80 V) compared to control samples (Blank BPM: 7.70 V; 0.75 %-Ti3C2TX-BPM: 5.51 V). Post-BMED salt conversion, the 1.00 %-PDA-Ti3C2TX-BPM displays the lowest final voltage drop (9.9 V), akin to the commercial SSBP-1 (9.8 V). The 0.75 %-PDA-Ti3C2TX-BPM attains the highest OH– concentration (0.094 mol·L-1) and current efficiency (98.79 %), surpassing SSBP-1 (0.090 mol·L-1, 94.47 %). The BPMs demonstrate superior energy consumption (2.00 ∼ 2.49 kWh kg−1) compared to SSBP-1 (2.94 kWh kg−1). This investigation delineates efficient and stable BPMs for BMED applications.","PeriodicalId":271,"journal":{"name":"Chemical Engineering Science","volume":"15 1","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Engineering Science","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.ces.2025.121487","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Bipolar membrane electrodialysis (BMED) efficiently transforms salts into acids and bases, with bipolar membranes (BPMs) playing a pivotal role. This study pioneers high-performance BPMs via a layer-by-layer casting/spraying technique, incorporating sulfonated polysulfone cation-exchange layers, polydopamine-modified MXene (PDA-Ti₃C₂T_X) interfacial layers, and quaternized polyphenylene oxide anion-exchange layers. PDA-Ti₃C₂T_X exhibits remarkable catalytic activity, promoting water dissociation. The BPMs exhibit exceptional interfacial compatibility, alkali resistance, and long-term durability. At 80 mA · cm⁻², the BPMs manifest reduced transmembrane voltages (1.54 ∼ 2.80 V) compared to control samples (Blank BPM: 7.70 V; 0.75 %-Ti₃C₂T_X-BPM: 5.51 V). Post-BMED salt conversion, the 1.00 %-PDA-Ti₃C₂T_X-BPM displays the lowest final voltage drop (9.9 V), akin to the commercial SSBP-1 (9.8 V). The 0.75 %-PDA-Ti₃C₂T_X-BPM attains the highest OH^– concentration (0.094 mol·L^-1) and current efficiency (98.79 %), surpassing SSBP-1 (0.090 mol·L^-1, 94.47 %). The BPMs demonstrate superior energy consumption (2.00 ∼ 2.49 kWh kg⁻¹) compared to SSBP-1 (2.94 kWh kg⁻¹). This investigation delineates efficient and stable BPMs for BMED applications.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.