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Tu YH, Huang HY, Yang YH, de Smet LCPM, Hu CC. A highly stable full-polymer electrochemical deionization system: dopant engineering & mechanism study. MATERIALS HORIZONS 2024; 11:3792-3804. [PMID: 38946305 PMCID: PMC11318517 DOI: 10.1039/d4mh00494a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 06/17/2024] [Indexed: 07/02/2024]
Abstract
Electrochemical deionization (ECDI) has emerged as a promising technology for water treatment, with faradaic ECDI systems garnering significant attention due to their enhanced performance potential. This study focuses on the development of a highly stable and efficient, full-polymer (polypyrrole, PPy) ECDI system based on two key strategies. Firstly, dopant engineering, involving the design of dopants with a high charge/molecular weight (MW) ratio and structural complexity, facilitating their effective integration into the polymer backbone. This ensures sustained contribution of strong negative charges, enhancing system performance, while the bulky dopant structure promotes stability during extended operation cycles. Secondly, operating the system with well-balanced charges between deionization and concentration processes significantly reduces irreversible reactions on the polymer, thereby mitigating dopant leakage. Implementing these strategies, the PPy(PSS)//PPy(ClO4) (PSS: polystyrene sulfonate) system achieves a high salt removal capacity (SRC) of 48 mg g-1, an ultra-low energy consumption (EC) of 0.167 kW h kgNaCl-1, and remarkable stability, with 96% SRC retention after 104 cycles of operation. Additionally, this study provides a detailed degradation mechanism based on pre- and post-cycling analyses, offering valuable insights for the construction of highly stable ECDI systems with superior performance in water treatment applications.
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Affiliation(s)
- Yi-Heng Tu
- Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsin-Chu 300044, Taiwan.
- Advanced Interfaces & Materials, Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen 6708 WE, The Netherlands.
| | - Hung-Yi Huang
- Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsin-Chu 300044, Taiwan.
| | - Yu-Hsiang Yang
- Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsin-Chu 300044, Taiwan.
| | - Louis C P M de Smet
- Advanced Interfaces & Materials, Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen 6708 WE, The Netherlands.
| | - Chi-Chang Hu
- Department of Chemical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsin-Chu 300044, Taiwan.
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Liang M, Ren Y, Cui J, Zhang X, Xing S, Lei J, He M, Xie H, Deng L, Yu F, Ma J. Order-in-disordered ultrathin carbon nanostructure with nitrogen-rich defects bridged by pseudographitic domains for high-performance ion capture. Nat Commun 2024; 15:6437. [PMID: 39085264 PMCID: PMC11291722 DOI: 10.1038/s41467-024-50899-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 07/24/2024] [Indexed: 08/02/2024] Open
Abstract
Carbon materials with defect-rich structure are highly demanded for various electrochemical scenes, but encountering a conflict with the deteriorative intrinsic conductivity. Herein, we build a highway-mediated nanoarchitecture that consists of the ordered pseudographitic nanodomains among disordered highly nitrogen-doped segments through a supramolecular self-assembly strategy. The "order-in-disorder" nanosheet-like carbon obtained at 800 °C (O/D NSLC-800) achieves a tradeoff with high defect degree (21.9 at% of doped nitrogen) and compensated electrical conductivity simultaneously. As expected, symmetrical O/D NSLC-800 electrodes exhibit superior capacitive deionization (CDI) performance, including brackish water desalination (≈82 mgNaCl g-1 at a cell voltage of 1.6 V in a 1000 mg L-1 NaCl solution) and reusage of actual refining circulating cooling water, outperforming most of the reported state-of-the-art CDI electrodes. The implanted pseudographitic nanodomains lower the resistance and activation energy of charge transfer, which motivates the synergy of hosting sites of multiple nitrogen configurations. Our findings shed light on electrically conductive nanoarchitecture design of defect-rich materials for advanced electrochemical applications based on molecular-level modulation.
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Affiliation(s)
- Mingxing Liang
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China
- School of Civil Engineering, Kashi University, Kashi, 844000, PR China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, PR China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Yifan Ren
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China
| | - Jun Cui
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China
| | - Xiaochen Zhang
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, PR China
| | - Siyang Xing
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China
- Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Jingjing Lei
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China
| | - Mengyao He
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou, 310003, PR China
| | - Libo Deng
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Fei Yu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, PR China
| | - Jie Ma
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China.
- School of Civil Engineering, Kashi University, Kashi, 844000, PR China.
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Li J, Wang R, Han L, Wang T, El-Bahy ZM, Mai Y, Wang C, Yamauchi Y, Xu X. Enhanced redox kinetics of Prussian blue analogues for superior electrochemical deionization performance. Chem Sci 2024; 15:11814-11824. [PMID: 39092121 PMCID: PMC11290438 DOI: 10.1039/d4sc00686k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 05/14/2024] [Indexed: 08/04/2024] Open
Abstract
Prussian blue analogues (PBAs), representing the typical faradaic electrode materials for efficient capacitive deionization (CDI) due to their open architecture and high capacity, have been plagued by kinetics issues, leading to insufficient utilization of active sites and poor structure stability. Herein, to address the conflict issue between desalination capacity and stability due to mismatched ionic and electronic kinetics for the PBA-based electrodes, a rational design, including Mn substitution and polypyrrole (ppy) connection, has been proposed for the nickel hexacyanoferrate (Mn-NiHCF/ppy), serving as a model case. Particularly, the theoretical calculation manifests the reduced bandgap and energy barrier for ionic diffusion after Mn substitution, combined with the increased electronic conductivity and integrity through ppy connecting, resulting in enhanced redox kinetics and boosted desalination performance. Specifically, the optimized Mn-NiHCF/ppy demonstrates a remarkable desalination capacity of 51.8 mg g-1 at 1.2 V, accompanied by a high charge efficiency of 81%, and excellent cycling stability without obvious degradation up to 50 cycles, outperforming other related materials. Overall, our concept shown herein provides insights into the design of advanced faradaic electrode materials for high-performance CDI.
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Affiliation(s)
- Jiabao Li
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225002 Jiangsu China
| | - Ruoxing Wang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225002 Jiangsu China
| | - Lanlan Han
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225002 Jiangsu China
| | - Tianyi Wang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225002 Jiangsu China
| | - Zeinhom M El-Bahy
- Chemistry Department, Faculty of Science, Al-Azhar University Nasr City Cairo Egypt
| | - Yiyong Mai
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Key Laboratory of Green and High-End Utilization of Salt Lake Resources (Chinese Academy of Sciences), Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
| | - Chengyin Wang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225002 Jiangsu China
| | - Yusuke Yamauchi
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University Nagoya 464-8603 Japan
- Department of Plant & Environmental New Resources, College of Life Sciences, Kyung Hee University 1732 Deogyeong-daero, Giheung-gu Yongin-si Gyeonggi-do 17104 South Korea
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland Brisbane QLD 4072 Australia
| | - Xingtao Xu
- Marine Science and Technology College, Zhejiang Ocean University Zhoushan 316022 Zhejiang China
- National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology Huaian 223003 P. R. China
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Lei J, Zhang X, Wang J, Yu F, Liang M, Wang X, Bi Z, Shang G, Xie H, Ma J. Interlayer Structure Manipulation of FeOCl/MXene with Soft/Hard Interface Design for Safe Water Production Using Dechlorination Battery Deionization. Angew Chem Int Ed Engl 2024; 63:e202401972. [PMID: 38703075 DOI: 10.1002/anie.202401972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/06/2024]
Abstract
Suffering from the susceptibility to decomposition, the potential electrochemical application of FeOCl has greatly been hindered. The rational design of the soft-hard material interface can effectively address the challenge of stress concentration and thus decomposition that may occur in the electrodes during charging and discharging. Herein, interlayer structure manipulation of FeOCl/MXene using soft-hard interface design method were conducted for electrochemical dechlorination. FeOCl was encapsulated in Ti3C2Tx MXene nanosheets by electrostatic self-assembly layer by layer to form a soft-hard mechanical hierarchical structure, in which Ti3C2Tx was used as flexible buffer layers to relieve the huge volume change of FeOCl during Cl- intercalation/deintercalation and constructed a conductive network for fast charge transfer. The CDI dechlorination system of FeOCl/Ti3C2Tx delivered outstanding Cl- adsorption capacity (158.47 ± 6.98 mg g-1), rate (6.07 ± 0.35 mg g-1 min-1), and stability (over 94.49 % in 30 cycles), and achieved considerable energy recovery (21.14 ± 0.25 %). The superior dechlorination performance was proved to originate from the Fe2+/Fe3+ topochemical transformation and the deformation constraint effect of Ti3C2Tx on FeOCl. Our interfacial design strategy enables a hard-to-soft integration capacity, which can serve as a universal technology for solving the traditional problem of electrode volume expansion.
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Affiliation(s)
- Jingjing Lei
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
| | - Xiaochen Zhang
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
| | - Junce Wang
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
| | - Fei Yu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, P.R. China
| | - Mingxing Liang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P.R. China
| | - Xinru Wang
- School of Physics, Beihang University, Beijing, 100191, P. R. China
| | - Zhuanfang Bi
- School of Physics, Beihang University, Beijing, 100191, P. R. China
| | - Guangyi Shang
- School of Physics, Beihang University, Beijing, 100191, P. R. China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co. Ltd., Hangzhou, 310003, P. R. China
| | - Jie Ma
- Research Center for Environmental Functional Materials, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, P.R. China
- School of Civil Engineering, Kashi University, Kashi, 844000, P.R. China
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Wu G, Wang H, Huang L, Yan J, Chen X, Zhu H, Wu Y, Liu S, Shen X, Liu W, Liu X, Zhang H. Copper hexacyanoferrate/carbon sheet combination with high selectivity and capacity for copper removal by pseudocapacitance. J Colloid Interface Sci 2024; 659:993-1002. [PMID: 38224631 DOI: 10.1016/j.jcis.2024.01.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/17/2024]
Abstract
The efficient capture of copper ions (Cu2+) in wastewater has dual significance in pollution control and resource recovery. Prussian blue analog (PBA)-based pseudocapacitive materials with open frameworks and abundant metal sites have attracted considerable attention as capacitive deionization (CDI) electrodes for copper removal. In this study, the efficiency of copper hexacyanoferrate (CuHCF) as CDI electrode for Cu2+ treating was evaluated for the first time upon the successful synthesis of copper hexacyanoferrate/carbon sheet combination (CuHCF/C) by introducing carbon sheet as conductive substrate. CuHCF/C exhibited significant pseudocapacitance and high specific capacitance (52.92 F g-1) through the intercalation, deintercalation, and coupling of Cu+/Cu2+ and Fe2+/Fe3+ redox pairs. At 0.8 an applied voltage and CuSO4 feed liquid concentration of 100 mg L-1, the salt adsorption capacity was 134.47 mg g-1 higher than those of most reported electrodes. Moreover, CuHCF/C demonstrated excellent Cu2+ selectivity in multi-ion coexisting solutions and in actual wastewater experiments. Density functional theory (DFT) calculations were employed to elucidate the mechanism. This study not only reveals the essence of Cu2+ deionization by PBAs pseudocapacitance with promising potential applications but also provides a new strategy for selecting efficient CDI electrodes for Cu2+ removal.
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Affiliation(s)
- Guoqing Wu
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Hongyu Wang
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Lei Huang
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Jia Yan
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Xuanxuan Chen
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Huabing Zhu
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Yi Wu
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Shumei Liu
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Xiaozhen Shen
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China
| | - Weiqi Liu
- International Department, The Affiliated High School of South China Normal University, No.1 Zhongshan Avenue West, Tianhe District, Guangzhou 510630, PR China
| | - Xianjie Liu
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping 60174, Sweden
| | - Hongguo Zhang
- School of Environmental Science and Engineering, Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou 510006, PR China.
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