Sustainable Materials and Technologies最新文献

Hydride ionic conductors: Bridging ionic transport mechanisms and design strategies for sustainable energy systems 氢化物离子导体：桥接离子传输机制和可持续能源系统的设计策略

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-16 DOI: 10.1016/j.susmat.2025.e01820

Kaixiang Ren , Jianhui Li , Hai-Wen Li , Yongtao Li

Hydride ions (H⁻) have emerged as compelling charge carriers for hydrogen and energy storage, distinguished by their exceptional polarizability, robust reducibility and high redox potential. While hydride ion batteries hold transformative potential across energy technologies, progress remains constrained by limited material discovery and subpar ionic conductivity in existing systems. This review systematically deciphers hydrogen transport mechanisms in state-of-the-art hydride conductors, including vacancy-mediated hopping, interstitial migration, phase-transition-assisted diffusion, and charge-carrier clustering. Critical insights into the regulatory role of A-site cation dynamics and hydrogen-site selectivity in governing these pathways are elucidated. Building on these fundamentals, this review discusses strategies for material modification that leverage these transport mechanisms to enhance the diffusion kinetics of hydrogen anions and improve material performance. Complementing experimental advances, computational descriptors derived from density functional theory (e.g., bandgap energy, defect formation energy, and migration energy) are analyzed as predictive tools for material innovation. By bridging mechanistic understanding with performance-driven design, this work charts a roadmap to overcome current limitations in hydride ion conduction, accelerating the realization of efficient, durable and sustainable energy systems.

氢化物离子（H -）以其优异的极化性、强大的还原性和高氧化还原电位而成为氢和能量储存的引人注目的电荷载体。虽然氢化物离子电池在能源技术方面具有变革潜力，但现有系统中有限的材料发现和低于标准的离子电导率仍然限制了进展。这篇综述系统地解读了最新的氢化物导体中的氢传输机制，包括空位介导的跳变、间隙迁移、相变辅助扩散和载流子簇化。本文阐明了a位点阳离子动力学和氢位点选择性在控制这些途径中的调节作用。在这些基础上，本文讨论了利用这些传输机制来增强氢阴离子扩散动力学和改善材料性能的材料改性策略。作为实验的补充，从密度泛函理论衍生的计算描述符（例如，带隙能量、缺陷形成能量和迁移能量）被分析为材料创新的预测工具。通过将机理理解与性能驱动设计相结合，本研究为克服当前氢化物离子传导的局限性，加速实现高效、耐用和可持续的能源系统绘制了路线图。

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引用次数: 0

Critical insights on progress and prospects for emerging contaminants photocatalytic degradation with zinc ferrite (ZnFe2O4) heterojunctions 铁酸锌（ZnFe2O4）异质结光催化降解新污染物的进展与展望

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-13 DOI: 10.1016/j.susmat.2025.e01816

Felipe de J. Silerio-Vázquez , Raf Dewil , Laroussi Chaabane , Bao-Lian Su , Babak Kakavandi , José B. Proal-Nájera

Zinc ferrite (ZnFe₂O₄) has gained increasing attention as a visible light-responsive and magnetically recoverable photocatalyst for emerging contaminant degradation. However, its low surface area and rapid charge recombination limit its photocatalytic efficiency. Coupling ZnFe₂O₄ with other semiconductors has led to zinc ferrite-based heterojunction photocatalysts (ZFHPs), where the heterojunction type and component ratio strongly influence charge-transfer pathways and photocatalytic performance. This review provides an integrated analysis of ZFHPs, emphasizing synthesis strategies from hydrothermal and coprecipitation routes to scalable microwave and combustion methods, as well as structural, optical, electronic, and magnetic characterization techniques that confirm heterojunction formation and interfacial band alignment. In addition to material design, particular attention has been given to dual photocatalytic and photo-Fenton mechanisms, optimization through statistical modeling, performance under solar and LED irradiation, and evaluations in real water matrices that reveal both resilience and limitations under complex conditions. Reusability and regeneration strategies are critically assessed, highlighting the roles of magnetic recovery, thermal and solvent-based treatments, and design approaches to mitigate photo-corrosion and leaching. Finally, prospects for advancing ZFHPs through micro- and millifluidic synthesis for scalable production, in situ characterization to probe interfacial charge dynamics, and evaluation in multi-contaminant systems that better reflect environmental reality are discussed. By integrating these aspects, this review identifies pathways to translate ZFHPs from laboratory demonstrations to practical and sustainable water treatment technologies.

铁酸锌（ZnFe2O4）作为一种可见光响应和磁可回收的光催化剂，越来越受到人们的关注。然而，其较低的比表面积和快速的电荷复合限制了其光催化效率。ZnFe2O4与其他半导体的耦合导致了锌铁氧体基异质结光催化剂（ZFHPs），其中异质结类型和成分比例强烈影响电荷转移途径和光催化性能。本文综述了zfhp的综合分析，强调了从水热和共沉淀法到可扩展的微波和燃烧方法的合成策略，以及确定异质结形成和界面带排列的结构，光学，电子和磁性表征技术。除了材料设计之外，还特别关注了双光催化和光fenton机制，通过统计建模进行优化，在太阳能和LED照射下的性能，以及在真实水基质中的评估，这些评估揭示了复杂条件下的弹性和局限性。对可重用性和再生策略进行了严格评估，强调了磁回收、热和溶剂型处理的作用，以及减轻光腐蚀和浸出的设计方法。最后，展望了zfhp的发展前景，包括微流和微流合成以实现规模化生产，原位表征以探测界面电荷动力学，以及在多污染物系统中更好地反映环境现实的评价。通过整合这些方面，本文确定了将ZFHPs从实验室演示转化为实用和可持续的水处理技术的途径。

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引用次数: 0

Emerging cement-based energy harvesting and storage materials for future net-zero energy buildings and infrastructure 新兴的水泥能源收集和储存材料，用于未来的净零能源建筑和基础设施

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-13 DOI: 10.1016/j.susmat.2025.e01817

Wenkui Dong , Zhaocheng Li , Qianyun Zhang , Hengyu Guo , Yuan Chen , Dewei Chu , Wengui Li

The integration of civil infrastructure and energy technologies has accelerated the development of cement-based energy materials, endowing traditional infrastructure with energy harvesting, storage, and thermal regulation capabilities. As cities face increasing energy demands and pressures to enhance climate resilience, cement-based energy materials offer a scalable and decentralized pathway for embedding energy functions directly into concrete-dominated infrastructure. This review provides a critical overview of recent advances across six emerging categories of cement-based energy materials, including thermoelectric cementitious materials (TECs), piezoelectric cementitious materials (PECs), cement-based triboelectric nanogenerators (CBTENGs), cement-based batteries (CBBs), cement-based supercapacitors (CBSs), and thermal storage concrete (TSC) incorporating phase change materials (PCMs). Each category is examined in terms of fundamental mechanisms, material formulations, manufacturing processes, performance, and representative applications. Key challenges including mechanical-functional trade-offs, environmental durability, performance standardization, and scalability are evaluated, and potential integration strategies are proposed. Future research directions are outlined, emphasizing multifunctional integration, long-term durability, scalable fabrication, and the development of standardized testing protocols to accelerate real-world deployment. By synthesising insights from construction materials, structural engineering, and energy harvesting and storage systems, this review underscores the transformative potential of cement-based energy materials in advancing smart, self-powering, and sustainable infrastructure aligned with global net-zero targets.

民用基础设施与能源技术的融合加速了水泥基能源材料的发展，使传统基础设施具备了能量收集、储存和热调节能力。随着城市面临日益增长的能源需求和增强气候适应能力的压力，水泥基能源材料为将能源功能直接嵌入混凝土主导的基础设施提供了一种可扩展和分散的途径。本文综述了六种新兴水泥基能源材料的最新进展，包括热电胶凝材料（tec）、压电胶凝材料（PECs）、水泥基摩擦电纳米发电机（CBTENGs）、水泥基电池（CBBs）、水泥基超级电容器（CBSs）和结合相变材料（PCMs）的储热混凝土（TSC）。每个类别都在基本机制，材料配方，制造工艺，性能和代表性应用方面进行了检查。关键挑战包括机械功能的权衡、环境耐久性、性能标准化和可扩展性进行了评估，并提出了潜在的集成策略。概述了未来的研究方向，强调多功能集成、长期耐用性、可扩展制造和标准化测试协议的发展，以加速现实世界的部署。通过综合建筑材料、结构工程和能源收集和储存系统的见解，本综述强调了水泥基能源材料在推进智能、自供电和可持续基础设施方面的变革潜力，与全球净零目标保持一致。

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引用次数: 0

Selective separation of Ni from Co and Mn in spent lithium-ion batteries using a novel tetramethylammonium chloride-based deep eutectic solvent 用新型四甲基氯化铵基深度共晶溶剂选择性分离废锂离子电池中的镍、钴和锰

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-12 DOI: 10.1016/j.susmat.2025.e01815

Parisa Biniaz , Rabi Gol , Saeed Askari , Ali Zavabeti , Yousuf Ali , Sankar Bhattacharya , Parama Chakraborty Banerjee

Achieving selective separation of transition metals with close reduction potentials, such as cobalt and nickel, from used lithium-ion batteries (LIBs) remains a key challenge due to their chemical similarity and the complexity of battery waste streams. This study reports a novel deep eutectic solvent, synthesised from maleic acid and tetramethylammonium chloride (M: TMAC), that enables the targeted extraction of critical metals from end-of-life LiNi_xCo_yMn_1−x−y O₂ cathodes.

Cobalt and manganese are selectively leached as [N(CH₃)₄]₂XCl₄, (TMATC-X, where X = Mn, Co) complexes through a unique solid–liquid phase separation mechanism and are subsequently recovered as a mixture of Co₃O₄ and MnO. Notably, nickel is selectively electrodeposited in metallic form onto a copper substrate, facilitated by the M: TMAC DES's high electrical conductivity, while lithium is recovered as lithium carbonate. This integrated system provides an efficient pathway for the targeted extraction of valuable metals, aligning with circular economy principles.

从废旧锂离子电池（LIBs）中实现具有紧密还原电位的过渡金属（如钴和镍）的选择性分离仍然是一个关键挑战，因为它们的化学相似性和电池废物流的复杂性。本研究报告了一种新型的深度共晶溶剂，由马来酸和四甲基氯化铵（M: TMAC）合成，能够从寿命终止的LiNixCoyMn1 - x−y O2阴极中有针对性地提取关键金属。钴和锰通过独特的固液分离机制选择性地浸出为[N(CH3)4]2XCl4, （TMATC-X，其中X = Mn, Co）配合物，随后以Co3O4和MnO的混合物的形式回收。值得注意的是，由于M: TMAC DES的高导电性，镍被选择性地以金属形式电沉积在铜衬底上，而锂被回收为碳酸锂。这一综合系统为有价值金属的定向提取提供了有效途径，符合循环经济原则。

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引用次数: 0

Green synthesis of Ti-MXene/Ti-MOF nano-hybrid carrying bio-inspired dopamine for advanced anti-corrosion smart coating 绿色合成携带仿生多巴胺的Ti-MXene/Ti-MOF纳米杂化物用于先进的防腐智能涂层

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-11 DOI: 10.1016/j.susmat.2025.e01813

Hedie Kazemi , Ali Dashan , Seyyed Arash Haddadi , Tizazu H. Mekonnen , Bahram Ramezanzadeh , Reza Goudarzi

MXenes, as the latest advanced two-dimensional materials with exceptional chemical and physical properties, have attracted significant interest in the scope of coatings and corrosion protection. Incorporating MXene into a polymer matrix can dramatically enhance coating performance, and when synergistically combined with metal-organic frameworks (MOFs) and green corrosion inhibitors, both passive and active protection mechanisms could be achieved alongside improved mechanical properties. In this study, an epoxy-based composite coating system with intelligent active self-healing properties, superior corrosion resistance, and mechanical stability was achieved using MXene sheets decorated with a MIL-125 (Ti) MOF, which was further loaded with bio-inspired dopamine and zinc inhibitors. After 63 days of immersion in a simulated corrosive environment, the optimized coating (EPO/ZDMS-MXene) demonstrated an impedance of 22.63 GΩ.cm², compared to 0.535 GΩ.cm² for the control sample (Epoxy, EPO). Additionally, electrochemical impedance spectroscopy (EIS) tests on scratched samples revealed significantly higher resistance for the EPO/ZDMS-MXene coating. Adhesion tests confirmed superior performance, with the ZDMS-MXene coating exhibiting a disbondment radius of only 5.72 mm, versus 12 mm for the EPO. Thermomechanical evaluation further showed an increased T_g temperature (84.04 °C vs. 81.79 °C) and a 34 % higher young modulus in the EPO/ZDMS-MXene compared to the EPO control. These results highlight the dual protective strategy combining a robust passive barrier with an intelligent active self-healing mechanism, offering a promising approach for durable and high-performance protective coatings.

MXenes作为最新的先进二维材料，具有优异的化学和物理性能，在涂料和防腐领域引起了人们的极大兴趣。将MXene加入到聚合物基体中可以显著提高涂层性能，当与金属有机框架（mof）和绿色缓蚀剂协同结合时，可以实现被动和主动保护机制，同时改善机械性能。在本研究中，采用MIL-125 (Ti) MOF修饰MXene片材，并进一步加载仿生多巴胺和锌抑制剂，获得了具有智能主动自愈性能、优异耐腐蚀性和机械稳定性的环氧基复合涂层体系。在模拟腐蚀环境中浸泡63天后，优化后的涂层（EPO/ZDMS-MXene）的阻抗为22.63 GΩ。cm2，相比0.535 GΩ。cm2为对照样品（环氧树脂，EPO）。此外，对划痕样品的电化学阻抗谱（EIS）测试表明，EPO/ZDMS-MXene涂层的电阻显著提高。附着力测试证实了优异的性能，ZDMS-MXene涂层的剥离半径仅为5.72 mm，而EPO涂层的剥离半径为12 mm。热力学评价进一步表明，与EPO对照相比，EPO/ZDMS-MXene的Tg温度（84.04°C vs. 81.79°C）升高，杨氏模量增加34%。这些结果强调了双重保护策略，结合了强大的被动屏障和智能的主动自愈机制，为持久和高性能的保护涂层提供了一种有前途的方法。

{"title":"Green synthesis of Ti-MXene/Ti-MOF nano-hybrid carrying bio-inspired dopamine for advanced anti-corrosion smart coating","authors":"Hedie Kazemi , Ali Dashan , Seyyed Arash Haddadi , Tizazu H. Mekonnen , Bahram Ramezanzadeh , Reza Goudarzi","doi":"10.1016/j.susmat.2025.e01813","DOIUrl":"10.1016/j.susmat.2025.e01813","url":null,"abstract":"<div><div>MXenes, as the latest advanced two-dimensional materials with exceptional chemical and physical properties, have attracted significant interest in the scope of coatings and corrosion protection. Incorporating MXene into a polymer matrix can dramatically enhance coating performance, and when synergistically combined with metal-organic frameworks (MOFs) and green corrosion inhibitors, both passive and active protection mechanisms could be achieved alongside improved mechanical properties. In this study, an epoxy-based composite coating system with intelligent active self-healing properties, superior corrosion resistance, and mechanical stability was achieved using MXene sheets decorated with a MIL-125 (Ti) MOF, which was further loaded with bio-inspired dopamine and zinc inhibitors. After 63 days of immersion in a simulated corrosive environment, the optimized coating (EPO/ZDMS-MXene) demonstrated an impedance of 22.63 GΩ.cm<sup>2</sup>, compared to 0.535 GΩ.cm<sup>2</sup> for the control sample (Epoxy, EPO). Additionally, electrochemical impedance spectroscopy (EIS) tests on scratched samples revealed significantly higher resistance for the EPO/ZDMS-MXene coating. Adhesion tests confirmed superior performance, with the ZDMS-MXene coating exhibiting a disbondment radius of only 5.72 mm, versus 12 mm for the EPO. Thermomechanical evaluation further showed an increased T<sub>g</sub> temperature (84.04 °C vs. 81.79 °C) and a 34 % higher young modulus in the EPO/ZDMS-MXene compared to the EPO control. These results highlight the dual protective strategy combining a robust passive barrier with an intelligent active self-healing mechanism, offering a promising approach for durable and high-performance protective coatings.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"47 ","pages":"Article e01813"},"PeriodicalIF":9.2,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic biochar functionalized with amino acid ionic liquid as a sustainable composite adsorbent: Synergistic enhancement of hydrogen bonding for effective norfloxacin adsorption 磁性生物炭与氨基酸离子液体功能化作为可持续的复合吸附剂：协同增强氢键以有效吸附诺氟沙星

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-11 DOI: 10.1016/j.susmat.2025.e01810

Xianzhao Zhang, Peirong Zhang, Fengmao Liu, Xuehui Chen, Qingrong Peng

The increasing contamination of water with antibiotics like norfloxacin (NOR) poses a risk to the environment. This study introduced a sustainable solution by developing a novel magnetic biochar composite functionalized with amino acid ionic liquids (AAILs) for efficient NOR adsorption. The biochar was optimized using central composite design, and 1-ethyl-1-methyl-pyrrolidinium glycinate was selected for modification of the magnetic biochar. The adsorption behavior fit well to both pseudo-second-order kinetics and the Langmuir isotherm. The optimal MPBC/AAIL composite demonstrated a remarkable NOR adsorption capacity of 296.8 mg·g^-1 at 298 K, significantly surpassing that of unmodified materials (113.4 mg·g^-1). The adsorption mechanism involved multiple interactions, including electrostatic attraction, pore-filling, hydrogen bonding, and π-π electron donor-acceptor interactions. Characterization, site energy distribution and density functional theory analyses revealed that introducing AAIL enhanced the oxygen-containing functional groups and facilitated hydrogen bonding, which emerged as the primary adsorption driving force. The material was resistant to environmental variations (pH, coexisting ions, and dissolved organic matter) and retained 79% capacity after five reuse cycles, achieving over 99% NOR removal in real water, while demonstrating excellent biocompatibility. This work highlights the role of functionalized biochar composites in addressing antibiotic contamination in water, providing a sustainable alternative to conventional materials.

诺氟沙星（NOR）等抗生素对水的污染日益严重，对环境构成了威胁。本研究通过开发一种新型的氨基酸离子液体功能化的磁性生物炭复合材料，为高效吸附NOR提供了一种可持续的解决方案。采用中心复合设计对生物炭进行优化，选择1-乙基-1-甲基-甘氨酸吡咯吡啶对磁性生物炭进行改性。吸附行为符合拟二级动力学和Langmuir等温线。最佳的MPBC/AAIL复合材料在298 K下对NOR的吸附量为296.8 mg·g-1，显著优于未改性材料的113.4 mg·g-1。吸附机理涉及多种相互作用，包括静电吸引、孔隙填充、氢键和π-π电子供体-受体相互作用。表征、位点能量分布和密度泛函理论分析表明，引入AAIL增强了含氧官能团，促进了氢键的形成，成为吸附的主要驱动力。该材料耐环境变化（pH值、共存离子和溶解有机物），在5次重复使用循环后仍保持79%的容量，在真实水中实现99%以上的NOR去除，同时表现出优异的生物相容性。这项工作强调了功能化生物炭复合材料在解决水中抗生素污染方面的作用，为传统材料提供了一种可持续的替代品。

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引用次数: 0

Kinetic study of HER inhibition and OER promotion with selenization on Rh/Ni(OH)2 catalysts 硒化对Rh/Ni(OH)2催化剂HER抑制和OER促进的动力学研究

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-11 DOI: 10.1016/j.susmat.2025.e01814

Dongdong Qin , Xingyun Li , Farhat Nosheen , Xueyan Wu , Yan Lv , Jixi Guo

The rational design and construction of efficient and stable bifunctional electrocatalysts remain a significant challenge in advancing the development of overall water splitting technology. In this work, Rh/Ni(OH)₂ and Rh/Ni₃Se₄ catalysts are successfully fabricated on nickel foam (NF) substrates for cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER), respectively. The influence of selenization on the kinetics of the HER and OER catalyzed by Rh/Ni(OH)₂ is systematically investigated. Results demonstrate that selenization (Rh/Ni₃Se₄) promotes the generation of high-valent Ni and significantly reduces the charge transfer resistance, thereby enhancing the OER activity. However, selenization increases the adsorption and desorption energy barriers of H intermediates, leading to a decrease in HER performance. At a current density of 10 mA cm⁻², the HER overpotential of the Rh/Ni₃Se₄/NF catalyst increases by 19 mV while the OER overpotential decreases by 50 mV compared to Rh/Ni(OH)₂/NF. Notably, an asymmetric electrolyzer utilizing these catalysts operates stably for over 800 h at a current density of 500 mA cm⁻² and maintains stability for 1000 h in start-stop cycle tests. This work provides a theoretical basis and experimental reference for the rational design of selenide catalysts.

合理设计和构建高效、稳定的双功能电催化剂仍然是推动整体水分解技术发展的重要挑战。在泡沫镍（NF）衬底上制备了Rh/Ni(OH)2和Rh/Ni3Se4催化剂，分别用于阴极析氢反应（HER）和阳极析氧反应（OER）。系统研究了硒化对Rh/Ni(OH)2催化HER和OER反应动力学的影响。结果表明，硒化（Rh/Ni3Se4）促进了高价Ni的生成，显著降低了电荷转移阻力，从而提高了OER活性。然而，硒化增加了氢中间体的吸附和解吸能垒，导致HER性能下降。当电流密度为10 mA cm−2时，与Rh/Ni(OH)2/NF相比，Rh/Ni3Se4/NF催化剂的HER过电位提高了19 mV， OER过电位降低了50 mV。值得注意的是，使用这些催化剂的不对称电解槽在500毫安厘米−2的电流密度下稳定运行超过800小时，并在启停循环测试中保持1000小时的稳定性。该工作为硒化催化剂的合理设计提供了理论依据和实验参考。

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引用次数: 0

Enhanced energy storage and conversion potentials induced by interfacial charge redistribution in ladder-like NiCo2S4/MoS2 heterointerface 阶梯状NiCo2S4/MoS2异质界面中电荷重分配诱导的能量储存和转换势增强

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-11 DOI: 10.1016/j.susmat.2025.e01806

Nwaji Njemuwa , Boka Fikadu , Marianna Gniadek , Hyojin Kang , Kamil Sobczak , Sohrab Asgaran , Magdalena Osial , Agata Roszkiewicz , Jaebeom Lee , Michael Giersig

A promising approach to catalysis in various electrochemical applications is engineering of heterostructures with enhanced active sites and interfacial electron transfer processes. In this study, conductive NiCo₂S₄ was interfaced with layered MoS₂ as bifunctional electrode material for asymmetric supercapacitors and hydrogen generation through water splitting. The creation of opposite charges within the heterostructure components facilitates the adsorption of OH⁻ and H⁺ ions, thereby boosting the bifunctional potentials. The constructed NiCo₂S₄/MoS₂ electrode showed excellent specific capacitance of 1488.9 F g⁻¹ at 1.0 A g⁻¹ current density and capacity retention of 93 % after 30-fold rise in current density. The asymmetric supercapacitor exhibits superior energy density of 63 Wh kg⁻¹ at power density 7.56 kW kg⁻¹ compared to similar electrode materials reported in literature. The hydrogen evolution performance of the electrode materials in alkaline media produced a low overpotential (79.95 mV at 10 mA cm⁻²) and small Tafel slope (59 mV dec⁻¹) that are comparable to the state-of-the-art Pt/C. Density functional theory calculation reveals a fast electron transfer from NiCo₂S₄ to MoS₂ leading to creation of positively charged surface and negatively charged surface at NiCo₂S₄ and MoS₂ respectively that facilitate the adsorption of OH⁻ and H⁺ ions. This study offered a promising high active and stable non‑platinum advanced electrode bifunctional catalyst for energy storage supercapacitor and energy conversion hydrogen generation.

具有增强活性位点和界面电子转移过程的异质结构工程是在各种电化学应用中催化的一个有前途的方法。在本研究中，导电NiCo2S4与层状MoS2界面作为非对称超级电容器和水裂解制氢的双功能电极材料。在异质结构组分中产生相反的电荷有助于OH -和H+离子的吸附，从而提高双功能电位。所制备的NiCo2S4/MoS2电极在1.0 A g−1电流密度下的比电容为1488.9 F g−1，电流密度提高30倍后的容量保持率为93%。与文献报道的类似电极材料相比，非对称超级电容器在7.56 kW kg - 1的功率密度下具有63 Wh kg - 1的优越能量密度。电极材料在碱性介质中的析氢性能产生了低过电位（10 mA cm−2时79.95 mV）和小塔菲尔斜率（59 mV dec−1），与最先进的Pt/C相当。密度泛函理论计算表明，NiCo2S4向MoS2的快速电子转移导致NiCo2S4表面和MoS2表面分别产生正电荷和负电荷，有利于OH -和H+离子的吸附。该研究为储能超级电容器和能量转换制氢提供了一种高活性、稳定的非铂高级电极双功能催化剂。

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引用次数: 0

Developing radiation shielding UHPC utilizing steel slag as heavyweight aggregates: Microstructural characteristics and shielding efficacy 以钢渣为重骨料研制辐射屏蔽UHPC：微结构特性及屏蔽效果

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-11 DOI: 10.1016/j.susmat.2025.e01809

Jiahe Miao , Daquan Shi , Yading Zhao , Haiyan Fu , Kunyang Yu , Weichen Tian , Yan Xia

This study introduces an innovative method for developing radiation shielding ultra high performance concrete (RS-UHPC) by utilizing recycled steel slag (SS) as heavyweight aggregates and supplementary cementitious materials. Comprehensive investigations were conducted to explore the effects of SS incorporation on the mechanical properties, microstructure, radiation shielding performance, and sustainability of UHPC. The substitution of silica sand with SS significantly increased the density of the concrete, leading to considerable improvements in mechanical performance. The 28-day compressive strength attained 159.1 MPa when silica sand was completely replaced by SS. Microstructural analysis revealed a substantial reduction in porosity and refined interfacial transition zones, significantly contributing to enhanced mechanical properties. The incorporation of SS increased the bulk density by introducing iron and densifying the microstructure of specimens. Both experimental investigations and numerical simulations conducted at an initial γ-ray energy of 1.17 MeV demonstrated that the application of SS improved the radiation attenuation efficiency of RS-UHPC specimens by 12.71 % compared to conventional UHPC. Life-cycle assessment results illustrated that SS incorporation reduced both global warming potential and fossil fuel depletion. The life-cycle unit cost of SS-enhanced RS-UHPC was only $873.3/m³ according to life-cycle costs. Comparative results revealed that the developed RS-UHPC achieved balanced performance in density, compressive strength, radiation shielding, carbon emissions, and cost compared to other RSCs. This work provides a sustainable, cost-effective strategy for industrial by-product utilization, promoting the performance optimization of UHPC for advanced radiation shielding applications.

本研究介绍了一种利用再生钢渣（SS）作为重骨料和补充胶凝材料开发辐射屏蔽超高性能混凝土（RS-UHPC）的创新方法。研究了SS掺入对UHPC的力学性能、微观结构、辐射屏蔽性能和可持续性的影响。用SS代替硅砂显著增加了混凝土的密度，从而大大改善了混凝土的力学性能。当硅砂完全被SS替代后，28天抗压强度达到159.1 MPa。显微结构分析表明，硅砂孔隙率大幅降低，界面过渡区细化，力学性能显著提高。SS的加入通过引入铁提高了试样的体积密度，使试样的显微组织致密化。在初始γ射线能量为1.17 MeV的条件下进行的实验研究和数值模拟表明，SS的应用使RS-UHPC样品的辐射衰减效率比常规UHPC提高了12.71%。生命周期评估结果表明，SS的加入降低了全球变暖潜势和化石燃料消耗。按全生命周期成本计算，ss增强RS-UHPC全生命周期单位成本仅为873.3美元/m3。对比结果表明，与其他rsc相比，开发的RS-UHPC在密度、抗压强度、辐射屏蔽、碳排放和成本方面取得了平衡的性能。本研究为工业副产品的可持续利用提供了一种经济有效的策略，促进了UHPC在先进辐射屏蔽应用中的性能优化。

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引用次数: 0

Circular economy and profitability: A techno-economic analysis of precious metal recovery from waste printed circuit boards 循环经济和盈利能力：从废弃印刷电路板中回收贵金属的技术经济分析

IF 9.2 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies

Pub Date : 2025-12-10 DOI: 10.1016/j.susmat.2025.e01812

Idiano D'Adamo , Francesco Ferella , Massimo Gastaldi , Nicolò M. Ippolito , Domiziana Lunadei

Electronic waste, and particularly that involving waste printed circuit boards (WPCBs), represents one of the fastest growing waste streams globally, posing both environmental challenges and opportunities for valuable metal recovery. This study aims to assess the technical and economic feasibility of a modified patented process for recycling WPCBs, with a focus on evaluating both recovery performance and the investment's economic sustainability. The methodology combines a technical assessment – based on the process description and the material and energy balance for a plant capacity of 500 t/year – with an economic evaluation derived from a detailed cash flow analysis. The results demonstrate excellent recovery rates for base metals, while precious metals show lower yet still significant yields, with gold recovery approaching 80 %. In the baseline scenario, net present value (NPV) is estimated at 46.7 million €. The sensitivity analysis reveals that, depending on the price of gold, NPV ranges from 20.2 to 50.9 million €, with a break-even point at a gold price of 4148 €/kg. Sensitivity and stress testing confirm that gold price is the most critical factor, followed by metal purity and WPCB purchase costs. Nevertheless, even under adverse conditions, NPV remains positive, reinforcing the overall economic robustness of the project. The managerial implications highlight the strategic potential of WPCB recycling as a sustainable technology enhancing resource security, advancing circular economy objectives and delivering long-term competitive advantages for both industry and policymakers.

电子废物，特别是涉及废弃印刷电路板（wpcb）的电子废物是全球增长最快的废物流之一，对环境构成挑战，同时也为有价值的金属回收带来了机遇。本研究旨在评估一种改进的wpcb回收专利工艺的技术和经济可行性，重点评估回收性能和投资的经济可持续性。该方法结合了技术评估——基于工艺描述和500吨/年工厂产能的材料和能源平衡——以及来自详细现金流分析的经济评估。结果表明，基本金属的回收率很高，而贵金属的回收率较低，但仍很显著，黄金的回收率接近80%。在基线情况下，净现值（NPV）估计为4670万欧元。敏感性分析表明，根据黄金价格的不同，NPV在2020 - 5090万欧元之间，在黄金价格4148欧元/公斤时达到盈亏平衡点。敏感性和压力测试证实，黄金价格是最关键的因素，其次是金属纯度和WPCB采购成本。然而，即使在不利条件下，净现值仍然为正，从而加强了项目的整体经济稳健性。管理意义突出了WPCB回收作为一种可持续技术的战略潜力，增强了资源安全，推进了循环经济目标，并为行业和政策制定者提供了长期竞争优势。

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引用次数: 0