Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第4页

Construction of coal molecular model and wetting behavior of composite surfactants under coal rank difference: Experimental-molecular simulation coupling study 煤分子模型的构建及煤阶差异下复合表面活性剂的润湿行为：实验-分子模拟耦合研究

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139200

Limin Du , Jiaxiong He , Dong Duan , Jun Nian , Xiaojing Feng , Hui Li , Jie Li , Lihuang Yang

The structural characteristics of coal molecules are the core factors regulating their wetting behavior. Accurately analyzing the influence of coal rank differences on molecular structure and the wetting mechanism of composite surfactants is of great significance for the development of efficient coal dust suppressants. This study focuses on lignite (HM), bituminous coal (YM), and anthracite (WYM) as research objects. Multi dimensional characterization techniques were used to systematically analyze the molecular structure of coal samples, and corresponding molecular models were constructed based on the extracted key parameters: WYM (C₂₃₄H₁₄₇N₅O₅), YM (C₁₇₅H₁₀₇NO₃₀), and HM (C₈₅H₅₆N₂O₂₆). Molecular dynamics simulations show that the composite surfactant R1 (sodium lauryl ether sulfate/fatty alcohol polyoxyethylene ether, SLES/AEO-9, Quality ratio 3:2) significantly enhances the interfacial interaction energy (44.72 %∼76.64 % higher than pure water systems) and increases the water molecule diffusion coefficient by 1.13–2.11 times. Quantum chemical analysis shows that sodium lauroyl ether sulfate (SLES) dominates the initial wetting process due to the strong negative charge of sulfate groups, while fatty alcohol polyoxyethylene ether (AEO-9) constructs a stable hydrogen bond network through the ether oxygen region, forming an electrostatic guided hydrogen bond stable synergistic adsorption mechanism, achieving interface wetting regulation of "tail chain anchoring head group water introduction". The contact angle experiment further confirmed that R1 composite surfactant reduced the surface contact angle of coal samples by 40∼60 % within 30 s, and the wettability significantly increased with the decrease of coal metamorphism degree. This study elucidates the intrinsic correlation between coal rank differences and the synergistic effect of surfactants at the molecular scale, providing theoretical support for the precise construction of coal molecular models and the targeted development of efficient wetting and dust suppressants.

煤分子的结构特征是调节其润湿行为的核心因素。准确分析煤阶差异对复合表面活性剂分子结构的影响及润湿机理，对开发高效煤尘抑制剂具有重要意义。本研究主要以褐煤（HM）、烟煤（YM）和无烟煤（WYM）为研究对象。采用多维表征技术对煤样的分子结构进行系统分析，并基于提取的关键参数WYM （C234H147N5O5）、YM （C175H107NO30）和HM （C85H56N2O26）构建相应的分子模型。分子动力学模拟表明，复合表面活性剂R1（十二烷基醚硫酸钠/脂肪醇聚氧乙烯醚，SLES/AEO-9，质量比3:2）显著提高了界面相互作用能（比纯水体系高44.72 % ~ 76.64 %），水分子扩散系数提高了1.13 ~ 2.11倍。量子化学分析表明，月桂醚硫酸钠（SLES）由于硫酸盐基团的强负电荷主导了初始润湿过程，而脂肪醇聚氧乙烯醚（AEO-9）通过醚氧区构建了稳定的氢键网络，形成了静电引导氢键稳定的协同吸附机制，实现了“尾链锚定头基引水”的界面润湿调节。接触角实验进一步证实，R1复合表面活性剂在30 s内使煤样表面接触角降低40 ~ 60 %，润湿性随着煤变质程度的降低而显著提高。本研究在分子尺度上阐明了煤阶差异与表面活性剂协同作用的内在相关性，为煤分子模型的精确构建和高效抑湿抑尘剂的有针对性开发提供了理论支持。

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引用次数: 0

A hydrophilic-hydrophobic silicon carbide/fluorine resin coating: Enhanced condensation heat transfer with robust corrosion and wear resistance for flue gas heat recovery 一种亲疏水碳化硅/氟树脂涂层：增强冷凝传热，具有强大的耐腐蚀性和耐磨性，用于烟气热回收

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139207

Junzhe Fan , Zhengqing Yang , Yine Ren , Xu Chen , Lida Wang , Wen Sun , Qian Wang , Junhai Luo , Guichang Liu

The protective coating for flue gas waste heat recovery demands synergistic integration of corrosion resistance, wear resistance, condensation heat transfer and water collection. In this study, we developed a novel hydrophilic-hydrophobic silicon carbide/fluorine resin coating through electrophoretic deposition combined with filler modification. The coating's enhanced performance originates from a cooperative mechanism: the hydrophilic fillers promote droplet nucleation, while the hydrophobic domains ensure efficient droplet shedding. Compared to the pristine coating, the hydrophilic-hydrophobic coating achieved significant enhancements on heat transfer: the steam-side heat transfer coefficient increased by over 250 %, the overall heat transfer coefficient by 32 % at most, and the water condensation rate by 62 % at most, while its thermal conductivity increased from 0.198 to 0.412 W/(m·K). Notably, the coating exhibited excellent corrosion resistance, maintaining a 1.3 × 10¹⁰ Ω·cm² low-frequency impedance modulus following a 30-day exposure to 80°C/30 wt% H₂SO₄ due to filler shielding and chemical stability. Furthermore, the high hardness of the fillers imparted good wear resistance, with the coating enduring 300 sandpaper abrasion cycles. The results demonstrate that the hydrophilic-hydrophobic coating provides a synergistic solution that overcomes the critical challenges for efficient flue gas waste heat recovery.

烟气余热回收保护涂层要求耐腐蚀、耐磨损、冷凝传热和集水协同一体化。本研究采用电泳沉积与填料改性相结合的方法制备了一种新型亲疏水性碳化硅/氟树脂涂层。涂层的增强性能源于一种协同机制：亲水性填料促进液滴成核，而疏水性结构域确保液滴有效脱落。与原始涂层相比，亲疏水涂层的换热性能得到了显著提高：蒸汽侧换热系数提高了250 %以上，总换热系数最高提高了32 %，冷凝水率最高提高了62 %，导热系数从0.198提高到0.412 W/（m·K）。值得注意的是，由于填料屏蔽和化学稳定性，该涂层具有优异的耐腐蚀性，在80°C/30 wt% H2SO4中暴露30天后，其低频阻抗模量保持在1.3 × 1010 Ω·cm2。此外，填料的高硬度赋予了良好的耐磨性，涂层可承受300次砂纸磨损。结果表明，亲疏水涂层提供了一种协同解决方案，克服了有效回收烟气余热的关键挑战。

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引用次数: 0

PtPd alloy catalyst promotes the selective electrocatalytic upgrading of ethylene glycol toward glycolic acid PtPd合金催化剂促进了乙二醇选择性电催化升级为乙醇酸

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139196

Yawen Li , Qunwu Huang , Jinli Zhang , Yan Fu

The electrocatalytic upgrading of ethylene glycol (EG) to glycolic acid (GA) via the thermodynamically favorable ethylene glycol oxidation reaction (EGOR) offers a sustainable substitute for the oxygen evolution reaction (OER). Herein, the PtPd alloy electrode material with a dendritic three-dimensional porous architecture was facilely fabricated for EGOR in alkaline media. The optimal Pt_1.25Pd_0.75/CC catalyst affords a current density of 10 mA cm⁻² at 0.38 V vs. RHE, representing a dramatic decrease of 1.236 V relative to the OER benchmark. It achieves an EG conversion of 87.77 % and a GA selectivity of 86.23 %, while maintaining high performance over eight cycles. Mechanism studies reveal that Pt and Pd function as synergistic active sites in EGOR, with Pd incorporation boosting the catalyst activity and stability via morphological and electronic modulation, of which the electronic effects play a dominant role by both optimizing the adsorption of key species (e.g., EG, OH⁻) and suppressing the oxidation of Pt species. The EGOR kinetics exhibits a distinct volcano-type dependence on applied potentials, characterized by an initial acceleration followed by a decay. This work demonstrates a promising route to upgrade EG into value-added products relying on PtPd alloy catalyst.

乙二醇氧化反应（EGOR）为乙二醇（EG）的电催化升级制乙二醇酸（GA）提供了一个可持续的替代析氧反应（OER）的方法。本文制备了具有枝晶三维多孔结构的PtPd合金电极材料，用于碱性介质中的EGOR。最佳的Pt1.25Pd0.75/CC催化剂在0.38 V时提供10 mA cm⁻2的电流密度，相对于OER基准，代表了1.236 V的显著降低。该方法的EG转化率为87.77 %，GA选择性为86.23 %，并在8个周期内保持了较高的性能。机理研究表明，Pt和Pd在EGOR中发挥协同活性位点的作用，Pd的加入通过形态和电子调节提高催化剂的活性和稳定性，其中电子效应主要通过优化关键物种（如EG、OH毒血症）的吸附和抑制Pt物种的氧化来发挥主导作用。EGOR动力学表现出明显的火山型依赖于施加电位，其特征是初始加速，随后衰减。这项工作为依托PtPd合金催化剂将EG升级为高附加值产品提供了一条有希望的途径。

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引用次数: 0

Multi-particle size SiO2-SH nanoparticles doped with optically modulated composite films for energy-saving and low-driving voltage flexible smart windows 掺杂光调制复合薄膜的多粒径SiO2-SH纳米颗粒用于节能和低驱动电压柔性智能窗

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139199

Wenhuan Yao , Zhengrui Ma , Xiaoxia Wang , Jie Zhao , Yanxia Wang , Anzhi Ma , Xin Ma , Ping Yu , Zemin He , Zongcheng Miao

Polymer dispersed liquid crystal (PDLC) electrochromic composite films, as a type of smart window, can respond to changes in external voltage to regulate the flux of sunlight and reduce energy consumption. Herein, three types of monodisperse spherical thiol-functionalized silica nanoparticles (SiO₂-SH NPs) with different particle sizes were successfully synthesized through precise control of the synthesis process. The morphology, functionalization, and particle size of the samples were characterized using SEM, FT-IR, Raman, and DLS analysis techniques, and the regulatory mechanisms of SiO₂-SH NPs and pure silica nanoparticles (SiO₂ NPs) doping in PDLC films were systematically investigated. Due to the degenerative transfer polymerization between the thiol groups and the polymer network, SiO₂-SH NPs can react more effectively with acrylic monomers. And the modified three-particle-size-combination synergistic doping system exhibited superior performance compared to the single-particle-size system, including lower driving voltage, higher contrast, and better sunlight modulation capability. The threshold voltage decreased to 14.0 V, and the saturation voltage decreased to 22.0 V, while maintaining a high contrast ratio above 274 and excellent modulation capability in the solar spectrum (ΔT_sol = 50.3 % and ΔT_lum = 66.3 %). This work opens new avenues for developing efficient and energy-saving smart windows and other composite films.

聚合物分散液晶（PDLC）电致变色复合薄膜作为一种智能窗口，可以响应外部电压的变化来调节太阳光的通量，降低能耗。本文通过对合成工艺的精确控制，成功合成了三种不同粒径的单分散球形硫醇功能化二氧化硅纳米颗粒（SiO2-SH NPs）。利用SEM、FT-IR、Raman和DLS分析技术对样品的形貌、官能化和粒径进行了表征，并系统研究了SiO2- sh NPs和纯二氧化硅纳米颗粒（SiO2 NPs）在PDLC膜中的掺杂调控机制。由于巯基和聚合物网络之间的退化转移聚合，SiO2-SH NPs可以更有效地与丙烯酸单体反应。改进后的三粒径组合协同掺杂体系比单粒径体系具有更低的驱动电压、更高的对比度和更好的太阳光调制能力。阈值电压降至14.0 V，饱和电压降至22.0 V，同时保持了274以上的高对比度和优异的太阳光谱调制能力（ΔTsol = 50.3 %和ΔTlum = 66.3 %）。这项工作为开发高效节能的智能窗和其他复合薄膜开辟了新的途径。

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引用次数: 0

A multifunctional Eu3+-modified HOF for ultrasensitive self-calibrated detection and efficient adsorption of thorium in aqueous solutions 一种用于超灵敏自校准检测和高效吸附水溶液中钍的多功能Eu3+修饰HOF

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139202

Yunhe You , Xiufang He , Haoran Li , Peixin Yang , Zhenyu Li , Wei Zhang , Tingming Jiang , Min Yan , Yiran Zhao , Fanbin Meng , Lisha Jiang , Wei Liu

This study presents Eu@HOF-BTB, a Eu³⁺-functionalized hydrogen-bonded organic framework (HOF) prepared via post-synthetic modification. The photoluminescence of the ligand and the optical properties of Eu³⁺ endow it with unique dual emission peaks, enabling ratiometric fluorescence detection and efficient adsorption of Th(IV). The detection limit of Eu@HOF-BTB for Th(IV) in tap water can reach 43 ppb, well below the U.S. Environmental Protection Agency’s standard of 246 ppb for Th(IV) in drinking water. It can perform self-calibrated and accurate quantification within a wide concentration range (0–300 ppm). The luminescence response is the result of the combined action of fluorescence resonance energy transfer (FRET) and the inner filter effect (IFE). Additionally, when the Th(IV) concentration is below 2.3 ppm, the adsorption efficiency of Eu@HOF-BTB for Th(IV) exceeds 90 %, and it exhibits stable recyclability after 3 cycles. Even in the presence of competitive ions, it can still maintain good adsorption performance. The selective adsorption and enrichment of Th(IV) are mainly driven by ion exchange between Th(IV) and Eu³⁺ within the framework and electrostatic interactions. Compared with traditional sensors and adsorbents, Eu@HOF-BTB uniquely combines dual emission sensing with high-performance capture functions, providing a promising platform for environmental monitoring and water purification.

本研究提出了一种通过合成后修饰制备的Eu3+功能化氢键有机骨架（HOF） Eu@HOF-BTB。该配体的光致发光特性和Eu3+的光学性质使其具有独特的双发射峰，从而实现了比例荧光检测和对Th（IV）的高效吸附。自来水中Th（IV）的Eu@HOF-BTB检测限可达43 ppb，远低于美国环境保护署对饮用水中Th（IV）的标准246 ppb。它可以在宽浓度范围（0-300 ppm）内进行自校准和准确的定量。发光响应是荧光共振能量转移（FRET）和内滤光效应（IFE）共同作用的结果。此外，当Th（IV）浓度低于2.3 ppm时，Eu@HOF-BTB对Th（IV）的吸附效率超过90 %，经过3次循环后表现出稳定的可回收性。即使在有竞争离子存在的情况下，仍能保持良好的吸附性能。Th（IV）的选择性吸附和富集主要由框架内Th（IV）与Eu3+之间的离子交换和静电相互作用驱动。与传统的传感器和吸附剂相比，Eu@HOF-BTB独特地结合了双排放传感和高性能捕获功能，为环境监测和水净化提供了一个很有前景的平台。

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引用次数: 0

Evaluation of colloidal stability of diluted suspensions using classical DLVO theory: Toward a predictive approach of particle agglomeration 用经典DLVO理论评价稀释悬浮液的胶体稳定性：走向颗粒团聚的预测方法

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139195

Guillaume Lemahieu, Matthieu Bouzaid

In current industrial formulations, the need of stable suspensions is often required to enhance the properties and the lifetime of products. Sometimes, a rapid destabilization of the product is even needed regarding specific applications targeted. To face such problematics, the colloidal stability is often characterized qualitatively using the classical DLVO theory for well-defined suspensions or by measuring the zeta potential derived from it for more complex systems. However, if the zeta potential traduces an estimation of the particle surface charging state, it cannot be directly related to the suspension colloidal stability which depends also on additional parameters. In the same way, simulations obtained from DLVO calculations appears often difficult to correlate with experimental results. In this study, fast time and space measurements of diluted suspensions of certified polystyrene and silica as well as non-controlled TiO₂ particles using Static Multiple Light Scattering (SMLS) analysis has been used to evaluate the Number based Particle Size Distribution (PSD) of agglomerated particles. Comparing the PSD of agglomerated particles allows to estimate an agglomeration ratio representative of each suspension colloidal stability. Results obtained indicate that this agglomeration ratio can be estimated from DLVO profiles simulations in conjunction with hydrodynamic properties of investigated suspensions. By using this correlation, reliable diameters of agglomerated particles have been estimated for diluted particle suspensions. Such results highlight that an effective prediction of the agglomeration rate of particles in diluted suspensions remains possible based on the classical DLVO theory, with applicability in various representative formulation fields such as cosmetics and pharmaceutics.

在目前的工业配方中，通常需要稳定的悬浮液来提高产品的性能和使用寿命。有时，甚至需要针对特定应用对产品进行快速不稳定处理。面对这样的问题，胶体稳定性通常是定性表征使用经典DLVO理论定义的悬浮液或通过测量zeta电位推导出更复杂的系统。然而，如果zeta电位导致了对颗粒表面充电状态的估计，它就不能直接与悬浮液的胶体稳定性有关，而胶体稳定性还取决于其他参数。同样，从DLVO计算中得到的模拟往往难以与实验结果相关联。在本研究中，采用静态多光散射（SMLS）分析方法对经过认证的聚苯乙烯和二氧化硅的稀释悬浮液以及不受控制的TiO2颗粒进行了快速时间和空间测量，以评估团聚颗粒的基于数的粒径分布（PSD）。比较凝聚颗粒的PSD可以估计代表每个悬浮液胶体稳定性的凝聚比。结果表明，该团聚率可以通过DLVO剖面模拟和所研究悬浮液的水动力特性来估计。通过使用这种相关性，可以估计出稀释颗粒悬浮液中凝聚颗粒的可靠直径。这些结果表明，基于经典DLVO理论对稀释悬浮液中颗粒团聚率的有效预测仍然是可能的，在化妆品、制药等具有代表性的配方领域具有适用性。

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引用次数: 0

Luminescence properties of trivalent europium complex nanocrystals synthesized by a reverse-micelle approach 反胶束法合成三价铕复合纳米晶体的发光特性

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139198

Ruiyan Dai , Li Zhang , Haoyang Long, Dongnan Tu, Chuanlang Zhan

Construction of lanthanide based luminescent assemblies has recently emerged as a research topic due to the phenomenon that formation of assemblies enables to enhance the emission of lanthanide ions. We have very recently reported an anionic Eu(III) complex nanocrystals (NCs) via a reversely micellar approach. In this paper, we present synthesis of Eu(III) complex NCs and their luminescent property resulted through changing the structures of anionic ligands, going from 1,1,1-trifluoropentane-2,4-dione (tfaa) (Eu-1) to 4,4,4-trifluoro-1-phenylbutane-1,3-dione (tfba) (Eu-2), 1-(2-Thenoyl)-3,3,3-trifluoroacetone (TTA) (Eu-3) and 1,3-Diphenylpropane-1,3-dione (dbm) (Eu-4), while maintaining 2,4,6-tris(2-pyridyl)-1,3,5-triazine (TPTZ) as the neutral ligand. The photoluminescence quantum efficencies (PLQYs) and lifetimes are of 7.4 % / 583.9 μs, 16.7 % / 720.8 μs, 25.4 % / 609.9 μs and 15.3 % / 631.8 μs for the Eu-1, Eu-2, Eu-3 and Eu-4 NCs, respectively. The luminescence is enhanced with using TTA as the anionic ligand. Transition electron microscopy observations indicate formation of NCs with average diameters of 3–4 nm. This study demonstrates that the reverse micelle method is a facile approach to synthesize Eu(III) complex NCs and their emission property is succesfully tuned by varying the structures of the anionic ligands.

由于镧系发光组件的形成能够增强镧系离子的发射，因此构建镧系发光组件近年来成为一个研究课题。我们最近通过反胶束方法报道了阴离子Eu（III）复合纳米晶体（NCs）。本文合成了Eu（III）配合物NCs，并通过改变阴离子配体的结构，从1,1,1-三氟戊烷-2,4-二酮（tfaa）（Eu-1）变为4,4,4-三氟-1-苯基丁烷-1,3-二酮（tfba）（Eu-2）、1-（2-乙烯基）-3,3,3-三氟丙酮（TTA）（Eu-3）和1,3-二苯丙烷-1,3-二酮（dbm）（Eu-4），同时保持2,4,6-三（2-吡啶基）-1,3,5-三嗪（TPTZ）作为中性配体。Eu-1、Eu-2、Eu-3和Eu-4纳米粒子的光致发光量子效率（PLQYs）和寿命分别为7.4 % / 583.9 μs、16.7 % / 720.8 μs、25.4 % / 609.9 μs和15.3 % / 631.8 μs。用TTA作为阴离子配体增强了发光。过渡电子显微镜观察显示形成的nc平均直径为3-4 nm。本研究表明，反胶束法是一种简便的合成Eu（III）配合物NCs的方法，通过改变阴离子配体的结构可以成功地调整其发射特性。

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引用次数: 0

Lignin bonded composite nanofibers membrane with ZIF-L intercalation: Combining toughness, high flux and rejection for dyestuff wastewater purification ZIF-L插层木质素键合复合纳米纤维膜：兼具韧性、高通量和截留性的染料废水净化

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139206

Wenbin Zhang , Hongzhen Cai , Xiangsheng Han , Yu Zhao , Xu Huang

Cellulose nanofibers-based membranes with balanced mechanical strength, flux and rejection rate are highly demanded in the purification of contaminated water, nevertheless, which still hard to achieve. In this work, an interfacial engineering strategy was proposed to fabricate cellulose nanofibers-based composite membranes (LC/DA@ZIF_x) using aramid nanofibers (ANFs) as reinforcing agents, lignin as interfacial binder, and 2-dimensional leaf-shaped zeolitic imidazolate framework (ZIF-L) as pore modifier. Ascribing to the dense noncovalent interactions (e.g., H-bond and π-π stacking) among each components, as well as the hierarchically layered structure, the composite membranes simultaneously exhibited promising mechanical properties (a mechanical strength of ∼163 MPa and a toughness of ∼11.89 MJ/m³), flux (61.95 L·m⁻²·h⁻¹·bar⁻¹), and rejection rates toward contaminated water (∼97.60 % for methyl violet, 98.68 % for rhodamine B, 97.12 % for rhodamine 6 G, 93.99 % for malachite green and 98.31 % for Coomassie brilliant blue). After 10 cycles of separation, the membranes can still retain a rejection rate of ∼69.98 %. Therefore, this study provided a simple and efficient strategy for manufacturing strong cellulose-based membranes that were suitable in the fast and efficient remediation of dyestuff effluent.

纤维素纳米纤维基膜的机械强度、通量和截留率平衡是污水净化的重要要求，但目前仍难以实现。本文提出了一种界面工程策略，以芳纶纳米纤维（ANFs）为增强剂，木质素为界面粘合剂，二维叶形沸石酰唑盐框架（ZIF-L）为孔改性剂，制备纤维素纳米纤维基复合膜（LC/DA@ZIFx）。由于各组分之间存在致密的非共价相互作用（如氢键和π-π stacking）以及分层层状结构，复合膜同时表现出良好的力学性能（机械强度为~ 163 MPa，韧性为~ 11.89 MJ/m3）、通量（61.95 L·m−2·h−1·bar−1）和对污染水的去除率（甲基紫外光为~ 97.60 %，罗丹明B为98.68 %，罗丹明6 G为97.12 %）。孔雀石绿为93.99 %，考马斯亮蓝为98.31 %)。经过10次循环分离后，膜仍能保持约69.98 %的截留率。因此，本研究为制造适用于染料废水快速高效修复的强纤维素基膜提供了一种简单有效的策略。

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引用次数: 0

Dynamic behaviors of impacting nanofluid droplets on hydrophilic vibrating surfaces with gigahertz-order frequency 纳米液滴在亲水振动表面千兆赫兹级频率上的动力学行为

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139194

Niming Peng , Lanlan Wang , Rong Wei , Yi Fang , Zhenghui Zhang , Bangdao Chen , Wei Jiang , Guojun Li , Hongzhong Liu

The vibration of solid surfaces is universal in nature and industry, giving rise to the multifarious dynamics of droplets on them. The dynamic behaviors of nanofluid droplets impacting on hydrophilic vibrating solid surfaces have been explored by molecular dynamics (MD). Specifically, the coupled effects of droplet properties and substrate vibration dynamics have been examined. Four impacting modes: Adhesion and Oscillation mode (AO mode), Up and Down mode (UD mode), Rebound mode (R mode), and Impact breakup mode (IB mode) are identified by analyzing the droplet’s morphological evolution and energy conversion. In high frequency–high amplitude (f_H, A_H) regions, the IB mode is triggered, resulting in a rebounding droplet with large kinetic energy. The R mode is achieved at the large vibration Weber number (We_v) and is adjustable by the Weber number of droplet (We). A classification model of nanofluid droplet impacting behavior has been established to forecast the morphological evolution on vibration surfaces by We and We_v. Especially, the empirical criterion has been given to build the integrity and rebound configurations of impacting nanofluid droplets on a vibration surface, as (We_v/We)^1/2 = n. This study offers molecular insights into the physics of nanofluid droplets impacting on hydrophilic vibrating surfaces, devoting itself to exploring the manageable dynamic behaviors of vibrating droplets in droplet atomization, surface acoustic wave (SAW) devices, nanofluidic systems, and droplet-based 3D printing.

固体表面的振动在自然界和工业中是普遍存在的，这就产生了固体表面上液滴的各种动力学。利用分子动力学方法研究了纳米液滴在亲水振动固体表面上的动力学行为。具体而言，研究了液滴特性和衬底振动动力学的耦合效应。通过分析液滴的形态演化和能量转换，确定了四种冲击模式：粘附振荡模式（AO模式）、上下模式（UD模式）、反弹模式（R模式）和冲击破碎模式（IB模式）。在高频-高振幅（fH， AH）区域，触发IB模式，产生具有大动能的反弹液滴。R模式在大振动韦伯数（Wev）下实现，并可通过液滴韦伯数（We）进行调节。建立了纳米流体液滴撞击行为的分类模型，并利用We和Wev对振动表面的形态演化进行了预测。特别是给出了建立纳米流体液滴在振动表面上的完整和回弹构型的经验准则，即（Wev/We）1/2 = n。本研究提供了纳米流体液滴影响亲水振动表面的分子物理见解，致力于探索振动液滴在液滴雾化、表面声波（SAW）器件、纳米流体系统和基于液滴的3D打印中的可控动力学行为。

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引用次数: 0

Mn2 + - templated defect engineering of NU-1000 for enhanced organic dye adsorption Mn2 +模板化NU-1000增强有机染料吸附缺陷工程

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2025-12-08 DOI: 10.1016/j.colsurfa.2025.139193

Yang Yang , Qiu Zhuang , Aming Xie , Haibo Zeng , Weijin Li

The discharge of substantial quantities of organic dyes from industrial wastewater poses serious threats to ecological systems and human health. Among various treatment technologies, adsorption has emerged as a highly promising approach for dye removal. Introducing defects into materials represents an effective strategy to increase active sites and enhance adsorption performance. In this study, a defect engineering approach was developed by using Mn²⁺ as a template to create Zr⁴⁺ vacancies within the Zr-oxo clusters of NU-1000, resulting in a series of Mn/Zr-n materials with controlled defect concentrations. XRD and FT-IR results confirm that the crystalline structure remained intact after defect introduction. Concurrently, TG and BET measurements reveal that the incorporation of Mn²⁺ as a template agent leads to a progressive decrease in the thermal stability of the materials, while simultaneously inducing an increase in the pore size. ICP-OES, EA and XPS test results further confirm the formation of Zr⁴⁺ defects and the complete elimination of the Mn²⁺ template. Adsorption studies demonstrated that these materials with Zr⁴⁺ vacancy defects exhibited enhanced adsorption capacities for organic dyes, with improvements ranging from 200 to 900 mg g⁻¹ relative to the pristine NU-1000. In particular, Mn/Zr-0.1 (with 0.1 mmol Mn²⁺ template) exhibited the highest adsorption capacity toward Rhodamine B (RhB), reaching 1917 mg g⁻¹. The adsorption process followed the Langmuir isotherm and pseudo-second-order kinetic models, indicating monolayer chemisorption. Mechanistic studies further revealed that the Zr⁴⁺ defects provided additional active sites for adsorption. Moreover, Mn/Zr-0.1 maintained high adsorption performance under varying pH conditions, temperatures, and competing ions, and demonstrated excellent reusability. These findings highlight the great potential of defect engineering in the design of high-performance adsorbents.

工业废水中大量有机染料的排放对生态系统和人类健康构成严重威胁。在各种处理技术中，吸附法已成为一种非常有前途的脱除染料的方法。在材料中引入缺陷是增加活性位点和提高吸附性能的有效策略。在本研究中，利用Mn2+作为模板，在NU-1000的Zr-oxo簇中产生Zr4+空位，从而开发出一系列缺陷浓度可控的Mn/Zr-n材料。XRD和FT-IR结果证实，缺陷引入后晶体结构保持完整。同时，TG和BET测量表明，Mn2+作为模板剂的掺入导致材料的热稳定性逐渐降低，同时引起孔径的增加。ICP-OES、EA和XPS测试结果进一步证实了Zr4+缺陷的形成和Mn2+模板的完全消除。吸附研究表明，这些具有Zr4+空位缺陷的材料对有机染料的吸附能力增强，相对于原始的NU-1000，其吸附能力提高了200到900 mg g−1。其中，Mn/Zr-0.1（0.1 mmol Mn2+模板）对罗丹明B （RhB）的吸附量最高，达到1917 mg g−1。吸附过程符合Langmuir等温线和拟二级动力学模型，为单层化学吸附。机理研究进一步揭示了Zr4+缺陷为吸附提供了额外的活性位点。此外，Mn/Zr-0.1在不同的pH条件、温度和竞争离子下都保持了良好的吸附性能，并表现出良好的可重复使用性。这些发现突出了缺陷工程在高性能吸附剂设计中的巨大潜力。

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引用次数: 0