Materials Today Sustainability最新文献_第7页

Application of multiple solid wastes as subgrade material in expressway subgrade: field test, microcosmic mechanism and sustainability 多种固体废物作为路基材料在高速公路路基中的应用：现场试验、微观机理及可持续性

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-11-03 DOI: 10.1016/j.mtsust.2025.101247

Liping Zhang , Mingrui Zhao , Xiaoqing Zhao , Bo Huang , Zimeng Zhou , Tianfeng Yang

Based on the concept of sustainable development, these solid wastes, such as soda residue (SR) and phosphate tailing (PT) were used to collaboratively prepare soda residue modified fishpond soil (SRS) and phosphate tailings-soda residue modified fishpond soil (PRS), stabilized by externally adding lime, which were applied as subgrade materials in expressway engineering. Through field tests and comparisons with lime-stabilized fishpond soil (LFS), the feasibility and advantages of them were verified as subgrade materials. Further microstructural analysis using XRD and SEM tests revealed its reaction mechanisms and microstructural characteristics. Additionally, carbon emissions and their economic assessments were conducted. As the curing time increased, the mechanical properties of SRS, PRS, and LFS all improved. After 7 days of curing, the value of CBR_f, MR_f, deflection, and DCPI of SRS are 71.1 %, 151.2 MPa, 68.2 (0.01 mm), and 1.01 cm/blow, respectively; for PRS, these values are 79.6 %, 164.4 MPa, 59.9 (0.01 mm), and 0.95 cm/blow; and for LFS, the values are 63.6 %, 131.0 MPa, 69.3 (0.01 mm), and 1.09 cm/blow. The road performances of SRS and PRS are slightly superior to those of LFS. XRD and SEM analysis indicate that the reticulated C-S-H and short-columnar AFt in the SRS and PRS systems fill the pores, thereby contributing to the development of strength. Sustainability analysis shows that SRS and PRS are environmentally friendly, low-carbon, and economically advantageous subgrade materials, suitable for application in the subgrade of expressways and highways.

基于可持续发展的理念，利用碱渣（SR）和磷酸尾渣（PT）等固体废弃物协同制备碱渣改性鱼塘土（SRS）和磷酸尾渣-碱渣改性鱼塘土（PRS），通过外加石灰稳定，作为高速公路工程路基材料。通过现场试验和与石灰稳定鱼塘土（LFS）的对比，验证了其作为路基材料的可行性和优越性。通过XRD和SEM对其进行微观结构分析，揭示了其反应机理和微观结构特征。此外，还进行了碳排放及其经济评估。随着固化时间的延长，SRS、PRS和LFS的力学性能均有所提高。养护7 d后，SRS的CBRf、MRf、挠度和DCPI分别为71.1 %、151.2 MPa、68.2（0.01 mm）和1.01 cm/blow；PRS值分别为79.6% %、164.4 MPa、59.9（0.01 mm）和0.95 cm/blow；LFS分别为63.6 %、131.0 MPa、69.3（0.01 mm）和1.09 cm/blow。SRS和PRS的道路性能略优于LFS。XRD和SEM分析表明，SRS和PRS体系中网状的C-S-H和短柱状的AFt填充了孔隙，促进了强度的发展。可持续性分析表明，SRS和PRS是一种环境友好、低碳、经济优势的路基材料，适合在高速公路路基中应用。

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引用次数: 0

Overcoming the SnO2 bottleneck in perovskite solar cells: Strategies for enhancing efficiency and stability 克服钙钛矿太阳能电池SnO2瓶颈：提高效率和稳定性的策略

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-11-05 DOI: 10.1016/j.mtsust.2025.101253

Qamar Wali , It Ee Lee , Teong Chee Chuah , Rajan Jose

Charge transport layers, which selectively transport electrons and holes, are critical to the performance and stability of perovskite solar cells (PSCs). Tin oxide (SnO₂) possesses distinctive advantages over the frequently used titanium dioxide (TiO₂) as an electron transport layer (ETL), supporting superior photovoltaic conversion efficiency and operational stability in PSCs. Nevertheless, state-of-the-art PSCs incorporating TiO₂ ETLs still demonstrate marginally superior practical performance, highlighting the need to address the limitations of SnO₂ to unlock its full potential. In this review, we examine PSCs employing SnO₂ ETLs with power conversion efficiencies (PCEs) exceeding 24 %, identifying their common characteristics and limitations. We critically analyze various strategies adopted in high-efficiency PSCs, including buried interfaces, self-assembled molecules, organic ligands, molecular bridging, and solvent engineering, and highlight the major challenges associated with SnO₂ ETLs from the perspective of scalability and commercialization.

电荷传输层选择性地传输电子和空穴，对钙钛矿太阳能电池（PSCs）的性能和稳定性至关重要。与常用的二氧化钛（TiO2）相比，氧化锡（SnO2）作为电子传输层（ETL）具有明显的优势，支持psc中优越的光伏转换效率和运行稳定性。然而，最先进的包含TiO2 etl的psc仍然表现出略微优越的实际性能，突出了解决SnO2的局限性以释放其全部潜力的必要性。在这篇综述中，我们研究了使用功率转换效率（pce）超过24% %的SnO2 etl的psc，确定了它们的共同特征和局限性。我们批判性地分析了高效PSCs采用的各种策略，包括埋藏界面、自组装分子、有机配体、分子桥接和溶剂工程，并从可扩展性和商业化的角度强调了SnO2 etl相关的主要挑战。

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引用次数: 0

Impact of work function cathode on performance and stability of organic solar cells with non-fullerene interlayers 功函数阴极对非富勒烯夹层有机太阳能电池性能和稳定性的影响

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-11-21 DOI: 10.1016/j.mtsust.2025.101254

Yeongsu Jo , So-yeon Ju , Seungyeon Hong , Gyeong Cheon Choi , Hyo Jung Kim , Hyung Woo Lee , Hui-Seon Kim , Ji-Youn Seo

Recently, the power conversion efficiency (PCE) of organic solar cells (OSCs) has been reported over 19 % due to the development of novel electron donor polymers and acceptor molecules such as PM6:Y6. In addition, cathode interlayers (CILs) based on non-fullerene structure (e.g., PNDIT-F3NBr and PDINN) have been employed in conventional OSCs to facilitate charge transfer from the active layer to electrode. However, metal electrodes for cathode contact have received relatively little attention and the role of the CIL/metal interface has been barely investigated in OSCs. While conventional OSCs generally adopt a low work function cathode (e.g., silver and aluminum) for an ideal energy positioning near the LUMO of the active material, in this study, gold (Au) with a high work function is utilized as the top electrode, which is rarely explored, resulting in a high open circuit voltage of 0.853 V and PCE of 14 % based on a device structure with ITO/PEDOT:PSS/PM6:Y6/PNDIT-F3N-Br/Au. X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) reveal a significant upward shift of the apparent work function of Au (ΔΦ_Au > 1.0 eV) at the CIL/Au interface, leading to a suitable energy level alignment for charge extraction and efficient device operation. On the other hand, Au diffusion into the PM6:Y6 active blend results in poor long-term stability of OSCs, as evidenced by grazing incidence wide angle X-ray scattering (GIWAXS) and impedance spectroscopy (IS).

近年来，由于新型电子给体聚合物和受体分子如PM6:Y6的发展，有机太阳能电池（OSCs）的功率转换效率（PCE）已超过19% %。此外，基于非富勒烯结构的阴极中间层（CILs）（例如PNDIT-F3NBr和PDINN）已被用于传统的OSCs中，以促进电荷从活性层转移到电极。然而，金属电极作为阴极接触电极受到的关注相对较少，并且对金属界面的作用几乎没有研究。传统的OSCs通常采用低功函数阴极（如银和铝）来实现在活性材料LUMO附近的理想能量定位，而在本研究中，采用具有高功函数的金（Au）作为顶电极，很少进行探索，基于ITO/PEDOT:PSS/PM6:Y6/PNDIT-F3N-Br/Au的器件结构，获得了0.853 V的高开路电压和14 %的PCE。x射线光电子能谱（XPS）和紫外光电子能谱（UPS）显示，在CIL/Au界面处，Au的视在功函数（ΔΦAu > 1.0 eV）明显向上移动，导致合适的能级对准，从而实现电荷提取和高效的器件运行。另一方面，Au在PM6:Y6活性混合物中的扩散导致osc的长期稳定性较差，掠入射广角x射线散射（GIWAXS）和阻抗谱（IS）证明了这一点。

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引用次数: 0

Upcycling cotton gin byproducts into bioplastics: A sustainable approach to Co-dissolution of lignin and cellulose using a DES/NMMO binary solvent 将轧棉机副产品升级为生物塑料：利用DES/NMMO二元溶剂实现木质素和纤维素共溶的可持续方法

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-10-06 DOI: 10.1016/j.mtsust.2025.101235

Mina Bayattork, Mostafa Akhlaghi Bagherjeri, Abu Naser Md Ahsanul Haque, Maryam Naebe

In this work, a sustainable and efficient approach was developed to address the challenges associated with the dissolution of the entire biomass lignocellulosic components. This was carried out using a deep eutectic solvent (DES) and N-methylmorpholine N-oxide (NMMO), together as a binary solvent system for direct dissolution and film fabrication of cotton gin trash (CGT) and cotton gin motes (CGM), two underutilized agricultural residues. The DES facilitated the selective dissolution of lignin and hemicellulose, while NMMO effectively dissolved crystalline cellulose. The synergistic action of DES and NMMO enabled efficient co-dissolution of lignin, hemicellulose and cellulose without fractionation. XRD and ¹³CNMR confirmed a transition from crystalline cellulose structure to a more amorphous network in the regenerated films, particularly in CGT-rich compositions. The films showed enhanced thermal stability, with the 1:1 CGT/CGM blend film exhibiting the highest onset temperature. The mechanical testing indicated that the 1:1 CGT/CGM blend films achieved an optimal balance between tensile strength and flexibility through combining CGM's crystalline cellulose reinforcement with CGT's amorphous lignin and hemicellulose content. This study demonstrates the potential of CGT and CGM as sustainable raw materials and the proposed DES/NMMO system as an effective green solvent for processing whole lignocellulosic biomass into high-value-added products.

在这项工作中，开发了一种可持续和有效的方法来解决与整个生物质木质纤维素成分溶解相关的挑战。采用深度共晶溶剂（DES）和n -甲基啉n -氧化物（NMMO）作为二元溶剂体系，对两种未充分利用的农业残留物轧棉渣（CGT）和轧棉渣（CGM）进行直接溶解和成膜。DES有利于木质素和半纤维素的选择性溶解，而NMMO则能有效溶解结晶纤维素。DES和NMMO的协同作用使木质素、半纤维素和纤维素在不分离的情况下有效共溶。XRD和13CNMR证实，再生膜从结晶纤维素结构转变为更无定形的网状结构，特别是在富含cgt的成分中。CGT/CGM共混膜表现出较高的热稳定性，其中CGT/CGM共混膜的起始温度最高。力学性能测试表明，CGM的结晶纤维素增强与CGT的无定形木质素和半纤维素含量相结合，使CGT/CGM 1:1共混膜的拉伸强度和柔韧性达到了最佳平衡。本研究证明了CGT和CGM作为可持续原料的潜力，以及所提出的DES/NMMO体系作为将整个木质纤维素生物质加工成高附加值产品的有效绿色溶剂的潜力。

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引用次数: 0

Applying excess wind power to green hydrogen production: A simulation approach to improving energy utilization in Greece's non-interconnected islands 将多余的风能应用于绿色氢气生产：提高希腊非互联岛屿能源利用率的模拟方法

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-10-10 DOI: 10.1016/j.mtsust.2025.101244

Giorgos Varras , Michail Chalaris

This study presents a practical and forward-looking approach to improving renewable energy integration within the isolated power systems of Greece's Non-Interconnected Islands (NIIs). It addresses a key challenge faced by such regions: the significant curtailment of wind energy due to infrastructure limitations, lack of interconnection, and the absence of grid-scale storage. Focusing on a medium-sized island as a representative case, the analysis introduces a tailored methodology for estimating excess wind output, combining hourly operational data with turbine-specific performance characteristics to assess the extent of untapped renewable potential.

The proposed system design involves coupling Proton Exchange Membrane (PEM) electrolysis with Reverse Osmosis (RO) desalination to produce green hydrogen using surplus wind power, even in water-scarce environments. Simulation results suggest that, under existing constraints, approximately 100 metric tons of hydrogen could be produced annually—energy that would otherwise go unused. Among the storage solutions evaluated, Compressed Gaseous Hydrogen (CGH₂) is identified as the most practical for this context, offering safety, scalability, and compatibility with local infrastructure.

In addition to technical feasibility, the study considers logistical aspects of hydrogen transport and favors CGH₂-based distribution via road trailers, aligning well with the decentralized nature of island systems. Beyond operational benefits, the approach holds broader implications for energy autonomy, reduced fossil fuel dependency, and environmental sustainability. Its originality lies in integrating excess wind recovery, water treatment, and hydrogen production into a unified, replicable framework, suited for real-world application in remote island contexts seeking resilient and clean energy alternatives.

本研究提出了一种实用和前瞻性的方法来改善希腊非互联岛屿（NIIs）孤立电力系统内的可再生能源整合。它解决了这些地区面临的一个关键挑战：由于基础设施限制、缺乏互联和缺乏电网规模的存储，风能的大量削减。以一个中型岛屿为例，分析介绍了一种量身定制的方法来估计多余的风力输出，将每小时的运行数据与涡轮机特定的性能特征相结合，以评估未开发的可再生能源潜力的程度。提出的系统设计包括耦合质子交换膜（PEM）电解和反渗透（RO）脱盐，即使在缺水的环境中也能利用剩余的风能生产绿色氢。模拟结果表明，在现有的限制条件下，每年可以生产大约100公吨的氢，否则这些能源将被闲置。在评估的存储解决方案中，压缩气体氢（CGH2）被认为是最实用的，具有安全性、可扩展性和与本地基础设施的兼容性。除了技术可行性之外，该研究还考虑了氢运输的后勤方面，并赞成通过道路拖车进行基于cgh2的分配，这与岛屿系统的分散性很好地吻合。除了运营效益外，该方法还对能源自主、减少对化石燃料的依赖和环境可持续性具有更广泛的影响。它的独创性在于将多余的风能回收、水处理和氢气生产整合到一个统一的、可复制的框架中，适合在偏远岛屿环境中寻求弹性和清洁能源替代品的实际应用。

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引用次数: 0

Thermal enhancement of phase change materials using nanoparticles and novel finned structures 利用纳米颗粒和新型翅片结构热增强相变材料

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-09-15 DOI: 10.1016/j.mtsust.2025.101222

Hassan Waqas , Meraj Ali Khan , Mohib Hussain , Zunhua Zhang

Phase change materials (PCMs) have proven vital in thermal energy storage systems due to their remarkable energy density and capacity to sustain a stable temperature. This study examines how adding new dendritic fin structures positioned in the lower region can improve heat transfer and melting kinetics in a molten salt-based nano-enhanced phase change material (NEPCM) with

F e_{3} O_{4} - C u

hybrid nanoparticles inside rectangular enclosures. A baseline example without fins, a second case with dendritic fins whose branch lengths decrease toward the bottom (type 1), and a third case with dendritic fins whose branch lengths increase toward the bottom (type 2) are the three different configurations that are examined in this study. The thermal behavior was numerically modelled using the porosity-enthalpy method. We also developed an artificial neural network (ANN) model with a multilayer perceptron architecture that includes two hidden layers to predict melting characteristics and thermal performance parameters, training it on both computational and experimental datasets. When paired with hybrid nanoparticles, total melting was accomplished about 41 % faster. With correlation coefficients above 0.98 and mean relative error below 3.5 % under all test settings, the created ANN model was able to predict melting percent, average temperature, and Nusselt number. The ANN model's sensitivity analysis revealed that the two most important factors influencing thermal performance were the concentration of nanoparticles and the fin branch length ratio. For future studies, it would be beneficial to focus on optimizing the parameters of these dendritic fin structures and to investigate the ideal

F e_{3} O_{4} - C u

ratios to achieve maximum thermal performance while ensuring colloidal stability.

相变材料（PCMs）由于其显著的能量密度和维持稳定温度的能力，已被证明在热能储存系统中至关重要。本研究探讨了在矩形外壳内添加Fe3O4−Cu杂化纳米颗粒的熔盐基纳米增强相变材料（NEPCM）中，在下部添加新的树枝状鳍结构如何改善传热和熔化动力学。一个没有鳍的基线例子，第二个有树枝状鳍的情况下，分支长度向底部减少（类型1），第三个有树枝状鳍的情况下，分支长度向底部增加（类型2），这是本研究中检查的三种不同的配置。采用孔隙率-焓法对其热行为进行了数值模拟。我们还开发了一个具有多层感知器架构的人工神经网络（ANN）模型，该模型包括两个隐藏层，用于预测熔化特性和热性能参数，并在计算和实验数据集上对其进行训练。当与混合纳米粒子配对时，总熔化速度提高了约41%。在所有测试设置下，相关系数大于0.98，平均相对误差小于3.5%，所建立的人工神经网络模型能够预测熔化率、平均温度和努塞尔数。神经网络模型的灵敏度分析表明，纳米颗粒的浓度和翅支长度比是影响热性能的两个最重要的因素。对于未来的研究，将有利于重点优化这些树枝状鳍结构的参数，并研究理想的Fe3O4−Cu比，以实现最大的热性能，同时确保胶体稳定性。

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引用次数: 0

Enhanced stability and performance of LiNi0.8Mn0.1Co0.1O2 cathodes via vanadium-doped polyoxometalate coating 通过掺钒多金属氧酸盐涂层提高了LiNi0.8Mn0.1Co0.1O2阴极的稳定性和性能

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-11-04 DOI: 10.1016/j.mtsust.2025.101249

Nafiseh Bolghanabadi , Arcangelo Celeste , Sergio Brutti , Sayed Khatiboleslam Sadrnezhaad , Abdolreza Simchi

Nickel-rich layered cathodes, such as LiNi_0.8Mn_0.1Co_0.1O₂ (NMC811), offer high specific capacity and energy density but suffer from surface instability, cation mixing, and side reactions at the electrode-electrolyte interface. These issues lead to structural degradation, capacity fading, and reduced cyclic stability in lithium-ion batteries. In this study, we propose a strategy to engineer the interface of NMC811 cathodes with an ultrathin 3D-network vanadium-doped polyoxometalate (PMV) shell, synthesized via a facile wet chemical method, to enhance their electrochemical performance and cyclic stability. Structural characterizations reveal that the uniform PMV coating (thickness around 30–50 nm) preserve the crystal structure of NMC811 while enhancing the stability of the electrode-electrolyte interface and improving lithium-ion diffusion. Electrochemical studies determine that the PMV-coated cathodes achieve a superior initial discharge capacity of 217 mAh g⁻¹, compared to 175 mAh g⁻¹ for the uncoated NMC811 (at 0.1C). The rate capability of the PMV-coated cathode is also enhanced to gain a specific capacity of 87.4 mAh g⁻¹ at 5C, which significantly outperform the uncoated cathode. Detailed investigations indicate that the coating minimizes particle cracking and voltage fading, thus contributing to improved long-term performance and cyclic stability. Applying this ultrathin, ion-conductive PMV coating highlights a viable path for optimizing nickel-rich cathodes.

富镍层状阴极，如LiNi0.8Mn0.1Co0.1O2 (NMC811)，具有较高的比容量和能量密度，但存在表面不稳定、阳离子混合和电极-电解质界面副反应等问题。这些问题导致锂离子电池的结构退化、容量衰减和循环稳定性降低。在这项研究中，我们提出了一种通过易湿化学方法合成的超薄3d网络掺钒多金属氧酸盐（PMV）外壳来设计NMC811阴极界面的策略，以提高其电化学性能和循环稳定性。结构表征表明，均匀的PMV涂层（厚度约为30-50 nm）在保持NMC811晶体结构的同时，增强了电极-电解质界面的稳定性，改善了锂离子的扩散。电化学研究表明，pmv涂层阴极的初始放电容量为217 mAh g - 1，而未涂层的NMC811 （0.1C）的初始放电容量为175 mAh g - 1。pmv涂层阴极的倍率能力也得到了增强，在5C时获得了87.4 mAh g−1的比容量，显著优于未涂层阴极。详细的研究表明，涂层最大限度地减少了颗粒裂纹和电压褪色，从而有助于提高长期性能和循环稳定性。应用这种超薄、离子导电的PMV涂层突出了优化富镍阴极的可行途径。

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引用次数: 0

MXene Synthesis, Surface Functionalization, and Membrane Integration for Photocatalytic Removal of Heavy Metals from Wastewater: A Comprehensive Review MXene合成、表面功能化和膜集成光催化去除废水中重金属的研究进展

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-09-05 DOI: 10.1016/j.mtsust.2025.101208

Noor H. Jawad , Teeba M. Darwesh , Asmaa F. Abbas , Ali A. Yahya , Afraa H. Kamel , Khalid T. Rashid , Tamara W. Abood , Raed A. Al-Juboori , Hicham Meskher , Saad Al-Saadi , Qusay F. Alsalhy

The accelerating global population growth and rising living standards have intensified pressure on freshwater resources, underscoring the urgent need for efficient wastewater treatment technologies. Conventional treatment methods are often inadequate for removing persistent and toxic heavy metal contaminants. MXenes, emerging two-dimensional transition metal carbides and nitrides, have garnered significant attention due to their remarkable hydrophilicity, chemical tunability, high surface area, and superior electrochemical properties. This review critically examines the development and application of MXene-based membrane nanomaterials for the photocatalytic removal of heavy metals from wastewater. Key aspects include novel synthesis routes, such as HF-free and eco-friendly methods, advanced structural modifications, and strategic surface functionalization to enhance photocatalytic and adsorptive performance. We further dissect the fundamental separation mechanisms, exploring electron transfer dynamics, interfacial interactions, and the synergistic roles of MXene composites. This comprehensive analysis aims to guide future research towards sustainable water purification technologies leveraging the unique capabilities of MXene-based systems.

全球人口的加速增长和生活水平的提高加剧了对淡水资源的压力，因此迫切需要有效的废水处理技术。传统的处理方法往往不足以去除持久性和有毒的重金属污染物。MXenes是新兴的二维过渡金属碳化物和氮化物，由于其显著的亲水性、化学可调性、高表面积和优异的电化学性能而引起了人们的广泛关注。本文综述了mxene基膜纳米材料光催化脱除废水中重金属的研究进展及应用。关键方面包括新的合成路线，如无高频和环保的方法，先进的结构修饰和战略性的表面功能化，以提高光催化和吸附性能。我们进一步剖析了基本的分离机制，探索了电子传递动力学、界面相互作用和MXene复合材料的协同作用。这项综合分析旨在指导未来的研究，利用基于mxene系统的独特功能，实现可持续的水净化技术。

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引用次数: 0

Shape-stabilized phase change composites based on ZIF-67/melamine foam for solar-thermal energy conversion and storage 基于ZIF-67/三聚氰胺泡沫的形状稳定相变复合材料的太阳能热能转换和储存

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-10-09 DOI: 10.1016/j.mtsust.2025.101240

Bing Liu , Qiushi Sun , Meng Sun , Shuang Liu , Hao Wu

As the need for enhanced energy efficiency and the use of renewable energy increases, polyethylene glycol (PEG), a crucial element in phase change materials (PCMs), has gained considerable focus in the areas of temperature control and energy storage. Nevertheless, PEG faces leakage and undesired light absorption problems in practical applications. In this study, melamine foam (MF) is utilized as an encapsulation material in an attempt to tackle the leakage problem. ZIF-67 is incorporated onto MF by in situ growth, followed by high-temperature carbonization to prepare a hierarchical porous carbon, which further enhances the absorbance of phase change composite (PCC). The crystallization of the prepared PCCs is in the range of 157.9-170.3 J/g. The photo-thermal conversion rate of PCC is 92.65 %, and the thermal conductivity is 0.38 W/(m∙K). In conclusion, the problems of PEG leakage and low light absorption were solved by carbonized porous encapsulation technique and in situ growth of ZIF-67, which enhanced the solar-thermal energy conversion of storage and PCCs.

随着对提高能源效率和可再生能源使用需求的增加，聚乙二醇（PEG）作为相变材料（PCMs）中的关键元素，在温度控制和能量存储领域受到了相当大的关注。然而，在实际应用中，PEG面临着泄漏和不期望的光吸收问题。在本研究中，三聚氰胺泡沫（MF）作为封装材料，试图解决泄漏问题。通过原位生长将ZIF-67加入到MF中，然后进行高温碳化制备层次化多孔碳，进一步提高了相变复合材料（PCC）的吸光度。所得PCCs的结晶范围为157.9 ~ 170.3 J/g。PCC光热转化率为92.65%，导热系数为0.38 W/(m∙K)。综上所述，通过碳化多孔封装技术和原位生长ZIF-67，解决了PEG泄漏和低光吸收的问题，增强了储能和ccs的光热转换。

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引用次数: 0

Development of bio-based flexible polyurethane foams incorporating phase change materials for thermal energy storage applications 结合相变材料的生物基柔性聚氨酯泡沫的研制

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability

Pub Date : 2025-12-01 Epub Date: 2025-10-05 DOI: 10.1016/j.mtsust.2025.101234

Damiano Rossi , Irene Anguillesi , Emanuele Maccaferri , Alekos Ioannis Garivalis , Ester D'Accardi , Davide Palumbo , Maria Michela Dell'Anna , Daniele Testi , Loris Giorgini , Maurizia Seggiani

The fabrication of innovative polyurethane panels for energy efficiency is increasingly important and should ideally be based on sustainable, non-fossil-based feedstock. In this context, the present work reports the development of sustainable composite panels by incorporating microencapsulated phase change materials (PCMs) into flexible polyurethane (PU) foams, synthesized from a polyol derived from waste cooking oil (WCO) and a partially bio-based isocyanate. The PU-PCM panels achieved energy storage capacity up to 26.2 J/g at a maximum PCM content of 15 phr. Uniform PCM dispersion slightly reduced cell size and increased panel density (from 128 to 157 kg/m³), thereby enhancing structural support and rigidity while reducing elasticity (compression force deflection up to 234.8 kPa). Fatigue tests confirmed resistance to cyclic loading, with increased dynamic stress and stiffness due to PCM integration. Differential scanning calorimetry showed minimal enthalpy hysteresis (±0.26 J/g) and a stable phase-change temperature (36 ± 0.1 °C), demonstrating resilience to thermal and mechanical stress. Thermal conductivity increased slightly (from 46.15 to 48.44 mW/m·K at 20 °C) due to the silica-based PCM shell, while thermal diffusivity decreased, favouring transient thermal regulation. Fire performance remained unaffected, likely due to the balance between the flammable paraffinic core and the flame-retardant silica shell of PCMs. Overall, bio-based PU-PCM panels show potential for transportation and construction applications owing to their lightweight, insulating, and flame-retardant properties. They offer improved sustainability and thermal-mechanical performance compared to conventional PU panels and flammable PCMs, while supporting circular economy principles by valorising end-of-life WCO.

为了提高能源效率，创新聚氨酯板的制造变得越来越重要，理想情况下，应该基于可持续的非化石原料。在此背景下，本工作报告了可持续复合板的发展，通过将微胶囊化相变材料（PCMs）纳入柔性聚氨酯（PU）泡沫中，由废食用油（WCO）衍生的多元醇和部分生物基异氰酸酯合成。在最大PCM含量为15 phr时，PU-PCM面板的储能容量高达26.2 J/g。均匀的PCM分散稍微减小了电池的尺寸，增加了面板密度（从128 kg/m3增加到157 kg/m3），从而增强了结构的支撑力和刚性，同时降低了弹性（压缩力挠度高达234.8 kPa）。疲劳测试证实了对循环载荷的抵抗，由于PCM集成而增加了动态应力和刚度。差示扫描量热法显示最小的焓滞（±0.26 J/g）和稳定的相变温度（36±0.1°C），显示出对热应力和机械应力的弹性。由于硅基PCM外壳的存在，导热系数略有增加（在20°C时从46.15 mW/m·K增加到48.44 mW/m·K），而热扩散率下降，有利于瞬态热调节。防火性能没有受到影响，可能是由于pcm的易燃石蜡芯和阻燃硅壳之间的平衡。总体而言，生物基PU-PCM面板由于其轻质、绝缘和阻燃特性，在运输和建筑应用中显示出潜力。与传统的PU面板和可燃pcm相比，它们提供了更好的可持续性和热机械性能，同时通过提高寿命终止的WCO来支持循环经济原则。

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