Journal of Colloid and Interface Science最新文献_第6页

A solid-state system for controllable hydrogen release: ammonia borane encapsulated in a catalyst-loaded graphene aerogel 可控氢释放的固态系统：包裹在负载催化剂的石墨烯气凝胶中的氨硼烷。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-02 DOI: 10.1016/j.jcis.2026.140032

Xueke Jiao , Lili Zhang , Jinzhan Li, Na Qin, Keping Ding, Qing Gao, Siyi Wang, Yafei Zhao, Bing Zhang

Achieving precise “on-off” control over hydrogen release is crucial for the efficient on-demand utilization of hydrogen energy. This study proposes a novel solid-state storage strategy, which involves loading ammonia borane (AB) and a cobalt catalyst into a graphene aerogel (AB@Co/RGOA), to regulate hydrogen generation via water-mediated hydrolysis. Characterization reveals that Co nanoparticles are uniformly dispersed on the graphene aerogel, while AB is effectively encapsulated within the structure to form a bulk solid composite. This AB@Co/RGOA system enables switchable hydrogen production, which can be precisely initiated and halted by modulating the water supply to the aerogel. Furthermore, the Co-decorated RGO framework (Co/RGOA) remains intact after AB is fully consumed and can be reloaded with fresh AB for subsequent cycles. The catalyst exhibits favorable catalytic activity toward AB hydrolysis with a turnover frequency (TOF) of 109.63 min⁻¹ at 25 °C. Moreover, the catalyst retains over 90% of its initial activity after five cycles of reuse. This work not only presents a viable approach to managing hydrogen release for potential on-board applications but also establishes a generalizable strategy that can be adapted to other catalyst-loaded porous materials for controlled hydrolytic hydrogen generation.

实现对氢释放的精确“开-关”控制对于有效地按需利用氢能至关重要。本研究提出了一种新的固态存储策略，将氨硼烷（AB）和钴催化剂加载到石墨烯气凝胶（AB@Co/RGOA）中，通过水介导的水解来调节氢的生成。表征表明，Co纳米颗粒均匀地分散在石墨烯气凝胶上，而AB则被有效地封装在石墨烯气凝胶结构中，形成大块固体复合材料。这种AB@Co/RGOA系统可以实现可切换的氢气生产，可以通过调节气凝胶的供水来精确地启动和停止氢气生产。此外，协同修饰的RGO框架（Co/RGOA）在AB被完全消耗后保持完整，并可以在随后的循环中重新加载新的AB。该催化剂对AB的水解具有良好的催化活性，在25℃时，转化率（TOF）为109.63 min-1。此外，该催化剂在重复使用五次后仍能保持90%以上的初始活性。这项工作不仅为潜在的机载应用提供了一种管理氢释放的可行方法，而且还建立了一种可适用于其他负载催化剂的多孔材料的控制水解氢生成的通用策略。

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引用次数: 0

Charge-mass transfer optimization via interfacial engineering: Advancing covalent organic frameworks toward high-performance Lithium-ion battery anodes 通过界面工程优化电荷-质量传递：向高性能锂离子电池阳极推进共价有机框架。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.jcis.2026.140039

Tao Zhou, Rui Zhou, Yibin Sun, Jingxian Lu, Kai Yuan, Hui Gao, Peihua Zhao, Yongping Qu

Covalent organic frameworks (COFs) exhibit considerable promise as lithium-ion battery anode materials due to their structural design flexibility and high theoretical capacities. However, critical challenges persist, including low electrical conductivity, structural instability arising from reversible bond cleavage, and inefficient utilization of electrochemically active sites. This study employs a stable dioxane-linked COF (DOL-COF) in terms of structure as the anode material and implements an interfacial engineering strategy to address these limitations. The approach enables orientation-designed and π-π interaction-driven in-situ growth of DOL-COF nanosheets on reduced graphene oxide (rGO) scaffolds. Electrochemical analysis identifies inefficient charge-mass transport within DOL-COF as the primary kinetic bottleneck. Theoretical calculations elucidate charge transport characteristics and reveal a tripartite lithium storage mechanism in DOL-COF, comprising Faradaic intercalation, pseudocapacitive redox storage, and non-Faradaic capacitive storage. This mechanistic insight guides the optimization of charge-mass transport via interfacial engineering. The resultant DOL-CRG-60 nanocomposite achieves electrode-mass-based reversible capacities of 1289 mAh g⁻¹ at 0.1 A g⁻¹ and 291 mAh g⁻¹ at 5.0 A g⁻¹, with 94.5% capacity retention after 3000 cycles at 5.0 A g⁻¹. The DOL-CRG-60 nanocomposite delivers an effective specific capacity of 1425 mAh g⁻¹, corresponding to approximately 84.5% utilization of Faradaic active sites. These enhancements originate from synergistic optimization of electronic conductivity, ion/electron transport pathways, and active-site accessibility, as evidenced by comparative electrochemical analyses. This work demonstrates that strategic manipulation of interfacial electronic structures and nanoscale architecture provides a viable approach for developing high-performance organic electrode materials with potential for diverse energy storage applications.

共价有机框架（COFs）由于其结构设计的灵活性和较高的理论容量，作为锂离子电池负极材料具有相当大的前景。然而，关键的挑战仍然存在，包括低导电性，可逆键解理引起的结构不稳定，以及电化学活性位点的低效利用。本研究采用结构稳定的二氧六烷连接COF （dolcof）作为阳极材料，并实施界面工程策略来解决这些限制。该方法实现了取向设计和π-π相互作用驱动的在还原氧化石墨烯（rGO）支架上原位生长DOL-COF纳米片。电化学分析表明，低效率的电荷-质量输运是dolc - cof的主要动力学瓶颈。理论计算阐明了电荷输运特性，揭示了锂在DOL-COF中的三重存储机制，包括法拉第插层、赝电容氧化还原存储和非法拉第电容存储。这种机制的洞察力指导通过界面工程优化电荷-质量输运。所得的DOL-CRG-60纳米复合材料在0.1 A g-1和5.0 A g-1下的电极质量可逆容量分别为1289 mAh g-1和291 mAh g-1，在5.0 A g-1下循环3000次后容量保持率为94.5%。dolg - crg -60纳米复合材料的有效比容量为1425 mAh g-1，相当于大约84.5%的法拉第活性位点利用率。对比电化学分析证明，这些增强源于电子电导率、离子/电子传递途径和活性位点可及性的协同优化。这项工作表明，对界面电子结构和纳米级结构的战略性操作为开发具有多种储能应用潜力的高性能有机电极材料提供了可行的方法。

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引用次数: 0

Functionalized benzoxazine-based phenolic resins for in situ photosynthesis and utilization of hydrogen peroxide 功能化苯并恶嗪基酚醛树脂的原位光合作用及过氧化氢利用。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-02 DOI: 10.1016/j.jcis.2026.140034

Chengcheng Chu , Xiaojie Wei , Ying Liu , Tianhua Yu , Anping Wang , Shun Mao

The development of facile and scalable methods to fabricate green photocatalysts with efficient charge separation remain pivotal for advancing photocatalytic H₂O₂ production toward practical applications. Herein, a sulfonic acid-functionalized benzoxazine-based phenolic resin (SAPFac) was reported for in situ H₂O₂ production and utilization. The electron-withdrawing sulfonic groups (-SO₃H) induce a robust intramolecular built-in electric field and impart surface negative charges, thereby synergistically enhancing photogenerated carrier separation efficiency and optimizing proton/oxygen affinity. The sulfonic acid-linked benzene rings in SAPFac serve as electron-enrichment centers, lowering the energy barrier for *OOH intermediate formation to favor the 2e⁻ oxygen reduction reaction (ORR) pathway to generate H₂O₂. Consequently, this molecular engineering strategy endows SAPFac resins with an exceptional H₂O₂ production rate of 4410.9 μmol g⁻¹ h⁻¹ under visible light without sacrificial agents or oxygen aeration, which is 2.1 times of pristine benzoxazine-based phenolic resin (APFac). Coupled with Fe³⁺, photo-self-Fenton system was constructed to achieve rapid degradation of antibiotics and complete inactivation of high-density antibiotic-resistant bacteria (∼10⁷ CFU/mL) via in situ activation of H₂O₂ into hydroxyl radicals (•OH). This work establishes a green and sustainable paradigm for polymer photocatalyst design, promoting the development of real field implementation of solar-driven H₂O₂ synthesis technology.

开发简单、可扩展的方法来制造具有高效电荷分离的绿色光催化剂，对于推进光催化生产H2O2的实际应用至关重要。本文报道了一种磺酸功能化苯并恶嗪基酚醛树脂（SAPFac）用于H2O2的原位生产和利用。吸电子磺酸基（-SO3H）在分子内产生强大的内置电场，并赋予表面负电荷，从而协同提高光生载流子分离效率，优化质子/氧亲和力。SAPFac中磺酸连接的苯环作为电子富集中心，降低了*OOH中间体形成的能垒，有利于2e-氧还原反应（ORR）途径生成H2O2。因此，这种分子工程策略使SAPFac树脂在可见光下的H2O2产率达到4410.9 μmol g-1 h-1，无需牺牲剂或氧气曝气，是原始苯并杂氮基酚醛树脂（APFac）的2.1倍。结合Fe3+，构建光自fenton系统，通过原位活化H2O2形成羟基自由基（•OH），实现抗生素的快速降解和高密度耐药菌（~ 107 CFU/mL）的完全失活。本研究为聚合物光催化剂的设计建立了一个绿色和可持续的范式，促进了太阳能驱动H2O2合成技术的真正现场实施。

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引用次数: 0

Structural optimization of FeOCl-functionalized hollow fiber ceramic membranes for catalytic ozonation of organic pollutants feocl功能化中空纤维陶瓷膜催化臭氧化处理有机污染物的结构优化。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-01 DOI: 10.1016/j.jcis.2026.140022

Ke Dong , Yaozhong Zhang , Heyun Yang , Xiaoyi Li , Luyao Dong , Xin Cao , Xing Zheng , Tufail Muhammad , Jiake Li

Due to high reactivity and oxidative capacity, membrane-based advanced oxidation processes (AOPs) have emerged as promising technologies for wastewater remediation. Herein, a FeOCl-functionalized hollow fiber ceramic membrane (FeOCl@HFCM) was fabricated via a dry–wet spinning phase inversion method, and its performance for recalcitrant organic pollutants degradation was evaluated. The asymmetric catalytic membrane with a 45% dense layer fraction achieved a removal efficiency of 99.8% for methylene blue and a 63.4% total organic carbon reduction rate. The hydraulic retention time was extended to 9.45 ms. COMSOL simulations indicated that increasing the proportion of the dense layer significantly enhanced the local concentration and confinement of reactive oxygen species (ROS), thereby improving pollutant degradation. The catalytic confinement effect generated within the dense layer significantly increased the local concentration of ROS, promoting the non-selective oxidation of pollutants. The membrane reactor exhibited robust stability over 30 days. Liquid chromatography–mass spectrometry and ECOSAR verified that degradation occurs via demethylation and ring-opening reactions driven by ^•OH and ^•O₂⁻, producing intermediates with relatively low toxicity. By selectively regulating the structure of the catalyst support, the non-selective and highly efficient oxidation of pollutants was achieved. This study provides guidance for the application of membrane-based AOPs in wastewater treatment.

基于膜的高级氧化工艺（AOPs）由于其高反应性和氧化能力，已成为一种很有前途的污水处理技术。本文采用干湿纺丝相转化法制备了feocl功能化中空纤维陶瓷膜（FeOCl@HFCM），并对其降解难降解有机污染物的性能进行了评价。致密层分数为45%的不对称膜对亚甲基蓝的去除率为99.8%，总有机碳还原率为63.4%。水力滞留时间延长至9.45 ms。COMSOL模拟表明，增加致密层的比例显著提高了局部活性氧（ROS）的浓度和限制，从而改善了污染物的降解。致密层内产生的催化约束效应显著增加了局部ROS浓度，促进了污染物的非选择性氧化。膜反应器在30天内表现出良好的稳定性。液相色谱-质谱和ECOSAR验证了降解通过•OH和•O2-驱动的去甲基化和开环反应发生，产生毒性相对较低的中间体。通过选择性调节催化剂载体的结构，实现了污染物的非选择性高效氧化。本研究为膜基AOPs在废水处理中的应用提供了指导。

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引用次数: 0

Highly selective photocatalytic conversion of CO2 to hydrocarbons, H2 evolution, and photodegradation of CV dye using SbSI and SbSeI as catalysts 以SbSI和SbSeI为催化剂的高选择性光催化CO2转化为碳氢化合物、H2演化和CV染料的光降解。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-02 DOI: 10.1016/j.jcis.2026.139981

Yu-Yun Lin , Szu-Han Chen , Yun-Rou Tseng , Chung-Shin Lu , Fu-Yu Liu , Jia-Hao Lin , Chiing-Chang Chen

Antimony sulfoiodide (SbSI) and antimony selenoiodide (SbSeI) are well-known chalcohalides extensively used in electronic and optoelectronic applications; however, their potential for photocatalytic CO₂ reduction has not been previously explored. In this study, both SbSI and SbSeI demonstrated effective triple functionality—converting CO₂ into hydrocarbons and H₂ evolution, while simultaneously degrading crystal violet (CV) under visible-light irradiation. After optimization, the SbSI catalyst achieved a CH₄ yield of 1340.2 ppm and an H₂ yield of 7533.8 ppm, while SbSeI produced 1244.8 ppm of CH₄ and 8917.4 ppm of H₂. The main reaction products were hydrocarbons and H₂, with high selectivity toward methane: 85.8% CH₄ and 14.2% C₂⁺ for SbSI, and 84.2% CH₄ and 15.8% C₂⁺ for SbSeI, respectively. This indicates a sequential conversion pathway from CO₂ to CH₄, followed by CC coupling to form higher hydrocarbons. Additionally, both catalysts showed excellent photocatalytic activity for the degradation of CV dye, with apparent rate constants (k) of 0.1679 h⁻¹ for SbSI and 0.0554 h⁻¹ for SbSeI. These results highlight the dual photocatalytic capability of Sb-based chalcohalides, providing new insights into their application in CO₂-to-hydrocarbon conversion and environmental remediation, thereby contributing to sustainable chemical and energy systems.

硫代碘化锑（SbSI）和硒代碘化锑（SbSeI）是众所周知的广泛用于电子和光电子应用的硫化物；然而，它们在光催化二氧化碳还原方面的潜力尚未被探索。在这项研究中，SbSI和SbSeI都表现出了有效的三重功能——在可见光照射下将CO2转化为碳氢化合物和氢气，同时降解结晶紫（CV）。优化后，SbSI催化剂的CH4产率为1340.2 ppm， H2产率为7533.8 ppm， SbSeI催化剂的CH4产率为1244.8 ppm， H2产率为8917.4 ppm。主要产物为烃类和H2，对甲烷的选择性较高：SbSI对甲烷的选择性分别为85.8% CH4和14.2% C2+， SbSeI对甲烷的选择性分别为84.2% CH4和15.8% C2+。这表明从CO2到CH4的连续转化途径，然后是CC偶联形成高级碳氢化合物。此外，两种催化剂均表现出良好的降解CV染料的光催化活性，SbSI和SbSeI的表观速率常数(k)分别为0.1679 h-1和0.0554 h-1。这些结果突出了sb基胆卤化合物的双光催化能力，为其在co2 -to-烃转化和环境修复中的应用提供了新的见解，从而有助于可持续的化学和能源系统。

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引用次数: 0

Mechanically tunable structural color hydrogel with MXene/PEDOT:PSS conductive networks for dual-channel information encoding 机械可调结构彩色水凝胶与MXene/PEDOT:PSS导电网络双通道信息编码。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-04 DOI: 10.1016/j.jcis.2026.140020

Pingping Wu , Xuegang Hao , Mingwei Chang , Wenjia Cao , Sijing Zhang , Jingxia Wang

Flexible optoelectronic materials capable of simultaneously transducing mechanical stimuli into multiple signal modalities are highly desirable for next-generation wearable electronics, intelligent sensing, and secure communication. Herein, a mechanically tunable conductive structural color hydrogel that integrates a MXene/PEDOT:PSS conductive network with an opal-templated photonic crystal (PC) structure is reported, enabling synchronized optical and electrical dual-signal responses under deformation. The hydrogel is constructed by infiltrating a polyacrylamide matrix containing MXene nanosheets and PEDOT:PSS into a periodic PC template, resulting in vivid, reversible structural colors alongside stable electrical conductivity. Owing to synergistic hydrogen bonding, electrostatic interactions, and chelation among MXene, PEDOT:PSS, and polymer chains, the hydrogel exhibits excellent stretchability (up to 650% strain), high strain sensitivity (gauge factor up to 7.16), rapid response (∼100 ms), and outstanding durability over 500 deformation cycles. Mechanical deformation induces reversible lattice spacing variation in the PC structure, producing pronounced color shifts that correlate quantitatively with resistance changes. The hydrogel is further demonstrated as a wearable platform for Morse code–based dual-channel information encoding and transmission driven by finger motion. This work establishes a versatile strategy for integrating PCs with highly conductive hydrogels, offering new opportunities for multimodal sensing, visualized signal readout, and secure optoelectronic communication.

柔性光电材料能够同时将机械刺激转换成多种信号模式，这对于下一代可穿戴电子产品、智能传感和安全通信是非常理想的。本文报道了一种机械可调谐的导电结构彩色水凝胶，该水凝胶将MXene/PEDOT:PSS导电网络与蛋白石模板光子晶体（PC）结构集成在一起，实现了变形下同步的光和电双信号响应。水凝胶是通过将含有MXene纳米片和PEDOT:PSS的聚丙烯酰胺基质渗透到周期性PC模板中来构建的，从而产生生动，可逆的结构颜色以及稳定的导电性。由于MXene、PEDOT:PSS和聚合物链之间的协同氢键、静电相互作用和螯合作用，水凝胶具有优异的拉伸性（高达650%的应变）、高应变灵敏度（测量因子高达7.16）、快速响应（~ 100 ms）和超过500次变形循环的出色耐久性。机械变形在PC结构中引起可逆的晶格间距变化，产生与电阻变化定量相关的明显的颜色变化。进一步演示了该水凝胶作为一种可穿戴平台，可实现基于莫尔斯电码的双通道信息编码和传输，由手指运动驱动。这项工作建立了一种将pc与高导电水凝胶集成的通用策略，为多模态传感、可视化信号读出和安全光电通信提供了新的机会。

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引用次数: 0

A hydrothermal pretreatment-assisted heterogeneous molten salt strategy to synthesize crystalline carbon nitride for solar-driven H2O2 production 水热预处理辅助非均相熔盐策略合成晶体氮化碳用于太阳能驱动的H2O2生产。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-03 DOI: 10.1016/j.jcis.2026.140050

Wanting Wang , Wenqing Yu , Yueyang Tan , Hui Yang , Bingwen Li , Xinfang Wang , Xihan Chen , Limin Huang , Zongzhao Sun , Chenglin Zhong , Woon-Ming Lau

Interfacial effects critically regulate photocatalytic pathways through charge transfer modulation, reactant enrichment, and transition-state stabilization. However, precisely manipulating free electrons to drive efficient O₂ reduction to H₂O₂ remains challenging. To address this, we develop a hydrothermal pretreatment-assisted heterogeneous molten salt strategy to synthesize crystalline carbon nitride (S/Cl-CN). This approach synergistically integrates molten KSCN (enabling rapid mass transfer and in situ generation of electron-withdrawing CN groups) with solid KCl (providing spatial confinement for oriented crystallization). The heterogeneous environment optimally tunes interfacial effects, enhancing structural order and charge separation efficiency. The resulting S/Cl-CN exhibits extended visible-light absorption (narrowed bandgap 2.67 eV), accelerated carrier mobility and optimized O₂ adsorption sites via CN-induced electron redistribution. These properties enable record H₂O₂ production rates of 4.58 mM g⁻¹ h⁻¹ in pure water (17-fold higher than the reference) and 177.1 mM g⁻¹ h⁻¹ with the sacrificial agent. Mechanistic studies confirm interfacial engineering promotes two-step single-electron oxygen reduction (via stabilized OOH^⁎ and HOOH^⁎ intermediates), complementary water oxidation pathways and reduced energy barriers for O₂ activation and conversion. This work resolves electron-manipulation challenges in photocatalytic H₂O₂ synthesis and establishes a scalable molten salt platform for interface-optimized catalyst design.

界面效应通过电荷转移调制、反应物富集和过渡态稳定来调节光催化途径。然而，精确地操纵自由电子来驱动有效的O2还原为H2O2仍然是一个挑战。为了解决这个问题，我们开发了一种水热预处理辅助非均相熔盐策略来合成结晶氮化碳（S/Cl-CN）。这种方法将熔融KSCN（实现快速传质和原位生成吸电子的CN基团）与固体KCl（为定向结晶提供空间限制）协同集成。异质环境优化了界面效应，提高了结构有序度和电荷分离效率。得到的S/Cl-CN具有可见光吸收扩展（窄带隙2.67 eV）、载流子迁移率加快和通过cn诱导的电子重分配优化O2吸附位点的特性。这些特性使得H2O2的产量在纯水中达到4.58 mM g-1 h-1（比参考值高17倍），在牺牲剂中达到177.1 mM g-1 h-1。机理研究证实，界面工程促进了两步单电子氧还原（通过稳定的OOH和HOOH中间体）、互补的水氧化途径和降低的O2活化和转化的能垒。这项工作解决了光催化H2O2合成中电子操纵的挑战，并为界面优化催化剂设计建立了一个可扩展的熔盐平台。

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引用次数: 0

Harnessing S-scheme COF/CdIn2S4 heterojunctions for enhanced photocatalytic performance 利用S-scheme COF/CdIn2S4异质结增强光催化性能。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-02 DOI: 10.1016/j.jcis.2026.140030

Yanyan Zhao , Xiaolong Li , Dongmei Xue , Hanfei Zhang , Mingbao Liu , Kaiqiang Xu , Jianjun Zhang

Photosynthesis for H₂O₂ production and pollutant degradation is a promising strategy to solve energy shortages and environmental pollution. However, developing photocatalysts with high-efficiency charge separation, migration, and utilization remains a major challenge. Herein, an organic-inorganic S-scheme heterojunction was constructed by integrating a Schiff-base covalent organic framework (COF) with CdIn₂S₄ (CIS). Leveraging the staggered energy band alignment and work function difference between COF and CIS, a built-in electric field (IEF) was established at their interface, which not only enabled rapid interfacial charge transfer but also preserved sufficient redox potentials, thereby achieving enhanced photocatalytic activity. The optimized COF/CIS heterojunction leverages its hierarchical structure, broad visible-light absorption, and efficient S-scheme charge transfer to achieve a high photocatalytic H₂O₂ generation rate of 3247 μmol·g⁻¹·h⁻¹ in RhB solution (10 mg·L⁻¹). An apparent quantum yield (AQY) of 3.87% is attained under 420 nm monochromatic light irradiation, along with a RhB degradation efficiency of approximately 93.2%. Furthermore, the enhanced interfacial charge transfer via the S-scheme heterojunction is elucidated using in-situ irradiated X-ray photoelectron survey spectrum (ISI-XPS) and femtosecond transient absorption (fs-TA) spectroscopy. This work establishes a rational design strategy for IEF regulation in organic-inorganic S-scheme heterojunction photocatalysts, thereby advancing the new prospects for artificial photosynthesis in energy and environmental applications.

光合作用生产H2O2和降解污染物是解决能源短缺和环境污染的一种很有前途的策略。然而，开发具有高效电荷分离、迁移和利用的光催化剂仍然是一个重大挑战。本文通过席夫碱共价有机骨架（COF）与CdIn2S4 （CIS）的集成，构建了有机-无机S-scheme异质结。利用COF和CIS之间的交错能带排列和功函数差异，在其界面上建立了内置电场（IEF），不仅实现了快速的界面电荷转移，而且保留了足够的氧化还原电位，从而增强了光催化活性。优化后的COF/CIS异质结利用其层次化结构、广泛的可见光吸收和高效的S-scheme电荷转移，在RhB溶液（10 mg·L-1）中光催化H2O2生成速率高达3247 μmol·g-1·h-1。在420 nm单色光照射下，表观量子产率（AQY）为3.87%，RhB降解效率约为93.2%。此外，利用原位辐照x射线光电子测量谱（ISI-XPS）和飞秒瞬态吸收谱（fs-TA）分析了S-scheme异质结增强的界面电荷转移。本研究为有机-无机s型异质结光催化剂的IEF调控建立了合理的设计策略，从而为人工光合作用在能源和环境方面的应用开辟了新的前景。

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引用次数: 0

Dynamically tunable and broadband electromagnetic wave absorption cellulose nanofiber-based aerogel metamaterial via one-dimensional interface engineering 基于一维界面工程的动态可调宽带电磁波吸收纤维素纳米纤维气凝胶超材料。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-01-28 DOI: 10.1016/j.jcis.2026.139998

Yunshan Mao , Chunxia Tang , Hongyu Sun , Yuhao Sheng , Cailing Yang , Jian Liu , Yifan Wang , Kaishuang Zhang , Shaohai Fu

Dynamic materials with broadband absorption and deflecting reflective beam properties are crucial for electromagnetic defense in complex environments. This work presented a cellulose nanofiber-based aerogel (MBAA) with superb elastic properties, featuring a reticulated pore wall structure via one-dimensional interface engineering. The reticulated pore walls of MBAA ensured excellent stress transfer, while the incorporation of silver nanowires introduced significant conductive losses. These features enabled the strain-driven tunable electromagnetic property of MBAA, yielding the lowest RL value of −65.56 dB and EAB of 4.0 GHz at 20% strain amplitude. Furthermore, a hollow aerogel metamaterial (MBAM) inspired by the natural structure of pine was proposed. Simulation results confirmed that the structural advantages of hexagonal cavity in MBAM activated EMW transmission paths, achieved broadband EMW absorption across a wide frequency range (1–18 GHz) optimizing through eight structural parameters. Moreover, MBAM demonstrated surprisingly deflection reflected beam properties varying from effective attenuation to anomalous reflection/scattering at different strain amplitudes. This was due to the abundant structure resonance and edge scattering effects, with a reduction in radar cross-section (RCS) reaching up to 43.33 dB·m². This study pioneers the realization of dynamically tunable broadband absorption and deflection-reflected beam properties, offering valuable insights for metamaterial design in electromagnetic defense.

具有宽带吸收和偏转反射光束特性的动态材料对于复杂环境下的电磁防御至关重要。通过一维界面工程，制备了一种具有优异弹性性能的纤维素纳米纤维基气凝胶（MBAA）。MBAA的网状孔壁确保了良好的应力传递，而银纳米线的掺入则带来了显著的导电损失。这些特性使MBAA具有应变驱动的可调谐电磁特性，在20%应变幅值下，RL最低为-65.56 dB， EAB为4.0 GHz。此外，还提出了一种受松树自然结构启发的中空气凝胶超材料（MBAM）。仿真结果证实了六角形腔在MBAM激活EMW传输路径中的结构优势，通过8个结构参数实现了1-18 GHz宽频率范围内的宽带EMW吸收优化。此外，MBAM在不同应变幅值下表现出令人惊讶的偏转反射光束特性，从有效衰减到异常反射/散射。这是由于丰富的结构共振和边缘散射效应，雷达截面（RCS）降低高达43.33 dB·m2。该研究率先实现了可动态调谐的宽带吸收和偏转反射光束特性，为电磁防御中的超材料设计提供了有价值的见解。

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引用次数: 0

Self-assembled nanostructures of 3ph-imi[FeCl4] as a strong ice recrystallization inhibitor 作为强冰重结晶抑制剂的3ph-imi[FeCl4]自组装纳米结构。

IF 9.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2026-05-15 Epub Date: 2026-02-01 DOI: 10.1016/j.jcis.2026.140021

Jie Yang , Xiaowen Zhang , Kongying Zhu , Xiaoyan Yuan , Wenxiong Shi , Tingting Ren , Lixia Ren

Ice recrystallization inhibition (IRI) materials are important in both fundamental research and practical applications, but achieving efficient regulation through molecular design remains challenging. Herein, we synthesized a series of imidazole-based ionic liquids with triphenyl groups, 3ph-imi[X], and investigated the influence of various anions on their relationship between self-assembled structures and ice crystal regulation properties. In aqueous solution, 3ph-imi[FeCl₄] was found to form well-defined spindle-shaped nanosheets with crystalline order, whereas the other anions (cl, Br, NO₃, Tb(NO₃)₄, ho(NO₃)₄) yielded conventional spherical micelles. Notably, 3ph-imi[FeCl₄] exhibited strong IRI activity (23.8%) at a rather low concentration (0.32 mM). The mechanism of the high IRI activity was investigated using single crystal X-ray diffraction and molecular dynamics simulations, which indicated that the spacing between its hydrophilic groups (7.07 Å) matched the lattice parameter of hexagonal ice along the c-axis, enabling effective adsorption onto the ice crystal surface thereby inducing interfacial curvature to inhibit ice crystal growth. This study provides new insights for designing high performance IRI materials by optimizing anion selection and molecular assembly to enhance interfacial order and ice matching capability, expanding the potential applications of ionic liquids in low-temperature fields

冰再结晶抑制（IRI）材料在基础研究和实际应用中都很重要，但通过分子设计实现有效调控仍然具有挑战性。本文合成了一系列具有三苯基3ph-imi[X]的咪唑基离子液体，并研究了各种阴离子对其自组装结构与冰晶调节性能关系的影响。在水溶液中，3ph-imi[FeCl₄]形成了清晰有序的纺锤形纳米片，而其他阴离子(cl、Br、NO3、Tb（NO3)4、ho(NO3)4）形成了常规的球形胶束。值得注意的是，3ph-imi[FeCl₄]在较低浓度（0.32 mM）下表现出较强的IRI活性（23.8%）。利用单晶x射线衍射和分子动力学模拟研究了高IRI活性的机理，结果表明，其亲水基团之间的间距（7.07 Å）沿c轴与六边形冰的晶格参数相匹配，从而在冰晶表面有效吸附，从而诱导界面曲率抑制冰晶生长。本研究通过优化阴离子选择和分子组装，增强界面有序度和冰匹配能力，为设计高性能IRI材料提供了新的思路，拓展了离子液体在低温领域的潜在应用。

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引用次数: 0