Desalination最新文献

{"title":"Spin-state engineering via ionic mismatch in MnO2 for high-performance hybrid capacitive deionization","authors":"Xiaoke Li ,&nbsp;Jinghua Yang ,&nbsp;Xuejing Wang ,&nbsp;Shiyu Wang ,&nbsp;Jingyu Wu ,&nbsp;Ruilong Liu ,&nbsp;Guixi Wang ,&nbsp;Jun Wang ,&nbsp;Weikun Ren ,&nbsp;Feike Zhang ,&nbsp;Weijie Fu ,&nbsp;Yingjie Ji ,&nbsp;Zhiyu Yang ,&nbsp;Yi-Ming Yan","doi":"10.1016/j.desal.2026.120024","DOIUrl":"10.1016/j.desal.2026.120024","url":null,"abstract":"<div><div>Manganese dioxide (MnO₂) is a promising electrode material for hybrid capacitive deionization (HCDI) due to its high theoretical capacity and low cost, yet the Jahn-Teller (J-T) distortion induced by high-spin Mn³⁺ ions (t_2g³e_g¹) causes severe structural degradation and manganese dissolution, critically hindering its practical stability. Herein, we report a spin-state engineering strategy via cobalt-induced ionic radius mismatch to intrinsically suppress J-T distortion in MnO₂. Co doping induces significant local lattice distortion, thereby breaking octahedral symmetry and inducing crystal field splitting. Systematic density functional theory (DFT) calculations reveal that this lattice distortion-driven crystal field distortion causes a significant upward shift in the Mn d_z² orbital energy level, compelling electron redistribution from e_g orbitals to lower-energy t_2g orbitals. This electronic reconfiguration effectively transitions Mn³⁺ from a high-spin to a low-spin state, thereby eliminating the uneven electron occupation in e_g orbitals that drives J-T distortion. Consequently, the optimized Co-MnO₂ electrode demonstrates superior HCDI performance in 500 mg L⁻¹ NaCl solution: a high initial salt adsorption capacity (SAC) of 83 mg g⁻¹, a rapid salt adsorption rate (SAR) of 4.33 mg g⁻¹ min⁻¹, and remarkable cycling stability with 82% capacity retention after 150 cycles. Experimental characterizations confirm enhanced Mn<img>O bond strength and suppressed manganese dissolution, validating the effectiveness of spin-state control. This work establishes ionic radius mismatch as a versatile design principle for developing J-T distortion-resistant electrochemical materials, offering new insights for engineering ultra-durable electrodes in water desalination and beyond.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120024"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environment-responsive phase transformation of Ni-modified cobalt phosphate aerogels for durable hydrogen evolution in freshwater and seawater","authors":"Younghun Kim ,&nbsp;Sang-Hyun Kim ,&nbsp;Jiseung Kim ,&nbsp;Wonjun Lee ,&nbsp;Hyun Jee Heo ,&nbsp;In Hye Kwak ,&nbsp;Vinayak G. Parale ,&nbsp;Hyung-Ho Park","doi":"10.1016/j.desal.2026.120010","DOIUrl":"10.1016/j.desal.2026.120010","url":null,"abstract":"<div><div>Non-precious 3d transition metal-based compounds are attractive electrocatalysts for the hydrogen evolution reaction (HER), but their structural instability under practical environments, particularly in seawater, remains a major challenge. Here, we report nickel modified cobalt phosphate (NCP) aerogels synthesized via a metal coordination-initiated sol-gel process, in which Ni incorporation governs environment-dependent reconstruction pathways. In freshwater, pristine cobalt phosphate undergoes surface oxidation toward crystalline oxyhydroxide species, whereas in seawater, Co(OH)₂ phases dominate due to Cl⁻-induced corrosion, resulting in compromised durability. Remarkably, Ni incorporation fundamentally alters these behaviors: in freshwater, it weakens the crystallinity of the CoOOH phase, and in seawater, it drives the formation of an amorphous CoOOH-rich matrix containing only minor Co(OH)₂ domains. This Ni-induced disorder suppresses long-range crystalline hydroxide growth, stabilizes the surface against chloride attack, and facilitates charge transfer. The optimized NCP2.5 catalyst achieves low overpotentials in freshwater and seawater, respectively, along with Tafel slopes of 67.6 and 103.4 mV dec⁻¹. It retains outstanding stability with only ~1% performance loss in freshwater after 100 h and ~ 8% in natural seawater after 100 h. These findings unveil a generalized design principle where dopant-induced amorphization guides environment-specific reconstruction pathways, providing design principles for robust and seawater-compatible hydrogen production.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120010"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A “solar basking cloth” evaporator constructed of Bi2OS2 hydrogel-melamine foam for efficient solar steam generation","authors":"Yuding Yang ,&nbsp;Die Lu ,&nbsp;Yuhan Liu ,&nbsp;Sihang Cheng ,&nbsp;Cuimei Liu ,&nbsp;Yangguang Li ,&nbsp;Xiuli Wang","doi":"10.1016/j.desal.2026.120042","DOIUrl":"10.1016/j.desal.2026.120042","url":null,"abstract":"<div><div>Solar-driven steam generation (SSG) technology, as a breakthrough solution to the global water crisis, not only establishes a green pathway for clean freshwater access but also pioneers an innovative paradigm for synergistic energy-environment governance. Currently, while significant academic progress has been made, overcoming bottlenecks in evaporation rate and energy conversion efficiency remains crucial for practical implementation. Here, this study constructs a bismuth oxide sulfide hydrogel-melamine foam evaporator (abbreviated as Bi₂OS₂ Gel-MF) featuring a three-dimensional multi-level water transport system via synthesizing novel Bi₂OS₂ nanosheets and drawing inspiration from traditional “solar basking cloth” structures. In this system, the hydrophilic MF framework acts as a “water transport artery” and continuously supplies water to the surface “evaporation fabric” (Bi₂OS₂ hydrogel), enabling rapid water transport and evaporation. Under standard solar irradiance, the Bi₂OS₂ Gel-MF achieves an evaporation rate of 3.30 kg m⁻² h⁻¹, demonstrating long-term sustainability and durability. This structure also exhibits excellent desalination performance and evaporation rates in practical seawater desalination, highlighting its potential applications in solar seawater desalination and photothermal water treatment.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120042"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioinspired 3D rolled evaporator with nanoconfined energy network for synergistic solar desalination and antibiotic degradation","authors":"Xiaowen Cui ,&nbsp;Xin Wang ,&nbsp;Xiao Sun ,&nbsp;Ting Wang ,&nbsp;Yicheng Wang ,&nbsp;Tinghui Wu ,&nbsp;Haoyue Wu ,&nbsp;Shengchen Wu ,&nbsp;Yutong Liu ,&nbsp;Junyi Tao ,&nbsp;Yongqi Yang ,&nbsp;Mengzhu Liu ,&nbsp;Yongpeng Wang ,&nbsp;Zhe Chen ,&nbsp;Tao Jia","doi":"10.1016/j.desal.2026.119999","DOIUrl":"10.1016/j.desal.2026.119999","url":null,"abstract":"<div><div>Addressing global freshwater scarcity requires advanced technologies that combine efficient desalination with the removal of emerging contaminants. Here, we report a banana tree-inspired three-dimensional (3D) rolled evaporator designed for high-performance solar desalination and simultaneous degradation of antibiotic pollutants. The evaporator is fabricated by anchoring a ZIF-67-derived, nanoconfined Co₃O₄/C composite onto a cotton gauze scaffold, with sodium alginate (SA) hydrogel acting as both a hydrophilic binder and an evaporation enthalpy regulator. The biomimetic 3D rolled geometry, mimicking the layered and curled structure of a banana tree stem, establishes a natural temperature gradient across its interlayer gaps, which facilitates continuous water replenishment and concentration-gradient-driven back diffusion of salt ions, enabling passive and self-regulated salt rejection without external energy input. The nanoconfined Co₃O₄/C composite not only exhibits excellent broadband photothermal conversion (average absorption of ~80.8%) but also serves as an efficient heterogeneous catalyst for peroxymonosulfate (PMS) activation. Under 1 sun irradiation, the evaporator achieves a high evaporation rate of 4.07 kg m⁻² h⁻¹ and an impressive energy efficiency of 94.01%, while maintaining stable performance in high-salinity brine (20 wt% NaCl) without salt accumulation. Moreover, the integrated system enables in-situ degradation of norfloxacin (NOR) via radical and non-radical pathways, reaching 90% removal within 120 min with minimal cobalt leaching. In summary, this work demonstrates a synergistic strategy that integrates a bioinspired three-dimensional architecture, a nanoconfined photothermal–catalytic energy network, and structure-regulated salt transport, enabling concurrent solar desalination and catalytic purification and offering a promising integrated solution for sustainable water treatment.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 119999"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mass transfer study for the removal of copper ions from industrial wastewater using fluidized bed ion exchange reactor impingement with jet flow","authors":"S.E. Tafeh ,&nbsp;H.A. Farag ,&nbsp;G.H. Sedahmed ,&nbsp;D.A. Elgayar","doi":"10.1016/j.desal.2026.119998","DOIUrl":"10.1016/j.desal.2026.119998","url":null,"abstract":"<div><div>The removal of copper ions from industrial wastewater was investigated using a recirculating batch reactor consisting of a fluidized bed packed with a cation exchange resin and impinged by an axial turbulent submerged jet. The study systematically investigated the influence of key operating parameters, including the initial copper ion concentration, jet velocity, nozzle diameter, resin weight (<span><math><mi>g</mi><mo>/</mo><mi>L</mi></math></span> of solution), and the distance between the nozzle jet surface and the bottom of the reactor on the mass transfer performance. The experimental results indicated that the mass transfer rate increases with an increase in jet velocity, nozzle diameter, and resin weight dosage, while the mass transfer rate decreases with an increase in the initial copper ion concentration. Moreover, an enhancement in mass transfer rate was observed as the distance from the nozzle jet surface to the reactor bottom decreased, reaching a maximum at an optimal distance at 3–4 cm, beyond which the rate declined with further distance decrease. The results showed that using a fluidized jet reactor increased the rate of mass transfer up to 55 times compared to natural convection, achieving a copper ion removal efficiency of 96% with a mass transfer coefficient of 0.2 cm/s in just 16 min. The mass transfer data obtained from the experiments were analyzed using dimensionless analysis and mathematically correlated to develop a dimensionless equation suitable for design and scale-up. The present data fit the correlation: <span><math><mi>Sh</mi><mo>=</mo><mn>7</mn><mo>∗</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup><msup><mi>Re</mi><mn>1.31</mn></msup><msup><mi>Sc</mi><mn>0.33</mn></msup></math></span> under the conditions 466.97 &lt; <em>Re</em> &lt; 4691.67, 1290.89 &lt; <em>Sc</em> &lt; 1416.53.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 119998"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Size-selective adsorption and multi-cycle treatment performance of hierarchical pitch-derived activated carbon for real textile effluent","authors":"Yong Li ,&nbsp;Dayeon Lee ,&nbsp;Byeong-Chan Min ,&nbsp;Tae Woon Kim ,&nbsp;Jun Young Choi ,&nbsp;Si-Hyeon Park ,&nbsp;Chul-Woong Cho ,&nbsp;Sung Wook Won","doi":"10.1016/j.desal.2026.119975","DOIUrl":"10.1016/j.desal.2026.119975","url":null,"abstract":"<div><div>Industrial dye wastewater poses persistent environmental concerns; designing adsorbents with tailored porosity and high surface area is critical for efficient treatment. This work presents hierarchical pitch-derived activated carbon (P-PAC) synthesized via KOH activation, achieving an ultrahigh BET surface area (2614 m²/g) and a dual <em>meso</em>/microporous structure as verified by BET, XRD, FTIR, SEM-EDS, and XPS analyses. P-PAC exhibited superior adsorption capacities for Methylene Blue (867 mg/g), Acid Red 18 (505 mg/g), and Reactive Yellow 2 (417 mg/g), exceeding commercial activated carbons by more than two-fold. The exceptional performance arises from synergistic mechanisms including electrostatic attraction, π–π stacking by graphitic domains, and hydrogen bonding via oxygen functionalities. Crucially, the optimized hierarchical pore network enabled pronounced molecular sieving in competitive multi-dye systems (e.g., MB/RY2 selectivity factor = 15.1), which dictates the size-selective adsorption. P-PAC demonstrated superior multi-cycle treatment performance, maintaining high color removal efficiencies of 80–99% over 30 non-regenerative cycles when treating real textile effluent, which strongly validates its potential for long-term applications. This work establishes a performance–structure relationship that will guide the future design of high-efficiency adsorbents for large-scale industrial wastewater applications.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 119975"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface-engineered PTFE-chitosan hybrid films for fluoride ion adsorption: A novel sorbent system","authors":"Tejaswini A. Rathi ,&nbsp;Vaishnavi Gomase ,&nbsp;Neha Singh ,&nbsp;D. Saravanan ,&nbsp;Ravin Jugade","doi":"10.1016/j.desal.2026.120033","DOIUrl":"10.1016/j.desal.2026.120033","url":null,"abstract":"<div><div>The recent research work presents a modified Poly tetrafluoroethylene (PTFE) cross-linked chitosan membrane (mPTFECs) as an effective adsorbent for the removal of fluoride (F⁻) ions from aqueous systems. The batch adsorption process was statistically enhanced and validated using Response Surface Methodology. The maximum capacity of the mPTFECs for F⁻ was calculated to be 42.71 mg g⁻¹, showing high affinity of mPTFECs for F⁻. The data for adsorption in equilibrium were found to fit the Langmuir isotherm (R² = 0.994) which indicates a monolayer adsorption on a homogeneous surface. Results of the kinetics study revealed that F⁻ adsorption was best explained by pseudo-second-order (R² = 0.995). Thermodynamic studies indicate that F⁻ adsorption onto mPTFECs is spontaneous as well as exothermic and driven by enthalpy. The membrane's effectiveness was further tested on real water samples in actual conditions. Moreover, regeneration studies indicated that after five successive adsorption-desorption cycles, the membrane maintained significant adsorption performance, indicating its reusability and cost-effectiveness. The potential of mPTFECs as an effective and sustainable adsorbent for adsorption removal is highlighted in the study.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120033"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient ammonium ion removal via a hybrid capacitive deionization platform with low-gap and structurally stable MIL-101(Fe)@cellulose nanocrystals","authors":"Xuan Zhang ,&nbsp;Chao Yan ,&nbsp;Yuting Peng ,&nbsp;Nannan Zhang ,&nbsp;Jiaxin Gao ,&nbsp;Minjie Shi ,&nbsp;Jianming Pan","doi":"10.1016/j.desal.2026.120002","DOIUrl":"10.1016/j.desal.2026.120002","url":null,"abstract":"<div><div>Metal-organic frameworks (MOFs) have surfaced as exceptionally promising porous materials, primarily because of their ability to form stable structures with remarkable properties. These frameworks possess numerous pores that enhance ion transport in capacitive deionization (CDI) applications. However, significant hurdles persist with MOFs, including a scarcity of active sites and complications related to water stability, which impede their broader usage. Additionally, the charge-discharge cycles that take place during operation can induce lattice distortions, a phenomenon associated with the Jahn-Teller effect that is intrinsic to MOF structures. To address this challenge, we have synthesized hybrid nanoparticles composed of MIL-101(Fe) and cellulose nanocrystals (CNCs), referred to as MCNCs, featuring a stable structure that integrates a π-conjugated framework characterized by extensive electron delocalization and a narrowed HOMO-LUMO gap. Additionally, the high density of active sites provided by C<img>O groups promotes efficient redox reactions, enhancing the NH₄⁺ capture capability. The produced MCNCs polymer demonstrates remarkable electro-adsorption properties and significant structural durability, achieving an impressive specific capacitance of 119.05 F g⁻¹ at 0.5 A g⁻¹. Leveraging the exceptional pseudocapacitive attributes of the MCNCs, we have engineered a hybrid capacitive deionization system that not only demonstrates an extraordinary ammonium removal capacity of 81.29 mg g⁻¹ and a swift average removal rate of 3.75 mg g⁻¹ min⁻¹ but also retains 93.79% of its initial removal capacity for ammonium ions after 100 cycles, offering a fast, effective, and sustainable method for treating water.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120002"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crab pincer-inspired bionic porphyrin-based adsorbent to achieve capture-co-reduction of uranyl ions by dinitrogen chelation","authors":"Taotao Qiang ,&nbsp;Chen Mi ,&nbsp;Jie Xiong ,&nbsp;Bing Shi ,&nbsp;Sijie Yu ,&nbsp;Fei Cheng ,&nbsp;Longfang Ren","doi":"10.1016/j.desal.2026.120003","DOIUrl":"10.1016/j.desal.2026.120003","url":null,"abstract":"<div><div>The hexavalent uranyl ions extracted from seawater cannot be directly used in nuclear energy, they must be further reduced to be tetravalent ones. However, the existing technologies nearly all focus on single adsorption or reduction, and there is very few studying on integrated adsorption-co-reduction method. Inspired by crab pincer, a novel adsorbent Ni-Por-1 was designed by using porphyrin as a framework and 2, 2′-bipyridine group as bidentate ligand, achieving adsorption-co-reduction of uranium from seawater. Ni-Por-1 has high photocurrent response and a narrow bandgap (1.39 eV), while the bidentate ligand can firmly capture uranyl ions. These endow it with excellent photocatalytic adsorption and in situ reduction properties. Under visible light irradiation, the adsorption equilibrium time of Ni-Por-1 is shortened to 60 min with an adsorption capacity of up to 249 mg g⁻¹, simultaneously the reduction efficiency to uranium (VI) reaches 64%. Meantime, it shows excellent selective adsorption to uranium (<em>K</em>_d = 9.88 × 10³ mL g⁻¹) and antibacterial properties (99.8%). When used in natural seawater, the adsorption capacity of Ni-Por-1 reaches 4.52 mg g⁻¹. This study realizes the integrated strategy of capture and in-situ photocatalytic reduction of uranyl ions, showing great strategic significance for the sustainable development of nuclear energy.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120003"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial confinement on activated carbon enables uniformly dispersed FeOOH for stable capacitive defluoridation","authors":"Chulei Zhao ,&nbsp;Dongxu Chen ,&nbsp;Jiao Yin ,&nbsp;Hui Zhu","doi":"10.1016/j.desal.2026.120027","DOIUrl":"10.1016/j.desal.2026.120027","url":null,"abstract":"<div><div>This study addresses the challenges of active site agglomeration and insufficient cycling stability of iron oxyhydroxide (FeOOH) when used as an electrode material in capacitive deionization (CDI). A composite preparation strategy was proposed, which combines ultrasonic-assisted precursor uniform dispersion, urea-regulated crystallization, and hydrothermal in-situ growth. This approach successfully constructed a FeOOH@AC composite electrode featuring highly dispersed FeOOH nanoflowers on an activated carbon (AC) substrate. The spatial confinement effect of AC was utilized to effectively inhibit the agglomeration of FeOOH and alleviate volume expansion during cycling. Experimental results demonstrated that the prepared FeOOH@AC electrode exhibited a high salt adsorption capacity of 80.2 mg·g⁻¹ during the CDI defluoridation process and retained over 90% of its capacity after 100 cycles, significantly outperforming most reported fluoride adsorbent materials. This work provides a material design strategy for constructing fluoride ion capture electrodes with high ion accessibility, rapid charge transfer, and long-term cycling stability.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"627 ","pages":"Article 120027"},"PeriodicalIF":9.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}