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NiFe-based arrays with manganese dioxide enhance chloride blocking for durable alkaline seawater oxidation. 含二氧化锰的镍铁基阵列增强了氯化物阻塞,用于持久的碱性海水氧化。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-13 DOI: 10.1016/j.jcis.2025.01.106
Xiaolan Tang, Na Yang, Zixiao Li, Zhengwei Cai, Qiuying Dai, Hefeng Wang, Xun He, Yongchao Yao, Tingshuai Li, Jun Guo, Xiaobin Niu, Xuping Sun
{"title":"NiFe-based arrays with manganese dioxide enhance chloride blocking for durable alkaline seawater oxidation.","authors":"Xiaolan Tang, Na Yang, Zixiao Li, Zhengwei Cai, Qiuying Dai, Hefeng Wang, Xun He, Yongchao Yao, Tingshuai Li, Jun Guo, Xiaobin Niu, Xuping Sun","doi":"10.1016/j.jcis.2025.01.106","DOIUrl":"10.1016/j.jcis.2025.01.106","url":null,"abstract":"<p><p>Seawater splitting is increasingly recognized as a promising technique for hydrogen production, while the lack of good electrocatalysts and detrimental chlorine chemistry may hinder further development of this technology. Here, the interfacial engineering of manganese dioxide nanoparticles decorated on NiFe layered double hydroxide supported on nickel foam (MnO<sub>2</sub>@NiFe LDH/NF) is reported, which works as a robust catalyst for alkaline seawater oxidation. Density functional theory calculations and experiment findings reveal that MnO<sub>2</sub>@NiFe LDH/NF can selectively enrich OH<sup>-</sup> and repel Cl<sup>-</sup> in oxygen evolution reaction (OER). MnO<sub>2</sub>@NiFe LDH/NF attains a current density of 1000 mA cm<sup>-2</sup> in alkaline seawater with an ultralow overpotential of only 313 mV. Furthermore, it can maintain stability at 1500 mA cm<sup>-2</sup> over 600 h. Further phosphidation of MnO<sub>2</sub>@NiFe LDH/NF can create MnO<sub>x</sub>@NiFeP/NF used in efficient hydrogen evolution reaction. Moreover, an anion exchange membrane electrolyzer with MnO<sub>2</sub>@NiFe LDH/NF as the anode and MnO<sub>x</sub>@NiFeP/NF as the cathode was also capable of seawater splitting at 500 mA cm<sup>-2</sup> for 100 h. This work offers light to develop effective and long-lasting electrocatalysts for seawater splitting.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"64-72"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid and in-depth reconstruction of fluorine-doped bimetallic oxide in electrocatalytic oxygen evolution processes. 电催化析氧过程中氟掺杂双金属氧化物的快速深入重建。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-12 DOI: 10.1016/j.jcis.2025.01.057
Yutong Wang, Hui Feng, Dong-Feng Chai, Wenzhi Zhang, Meili Qi, Yue Li, Guohua Dong, Yibo Wang, Dongxuan Guo
{"title":"Rapid and in-depth reconstruction of fluorine-doped bimetallic oxide in electrocatalytic oxygen evolution processes.","authors":"Yutong Wang, Hui Feng, Dong-Feng Chai, Wenzhi Zhang, Meili Qi, Yue Li, Guohua Dong, Yibo Wang, Dongxuan Guo","doi":"10.1016/j.jcis.2025.01.057","DOIUrl":"10.1016/j.jcis.2025.01.057","url":null,"abstract":"<p><p>Most transition metal-based electrocatalysts, when used for the oxygen evolution reaction (OER), undergo significant restructuring under alkaline conditions, forming localized oxides/hydroxides (MOOH), which act as the real active centers, activating adjacent metal sites and creating new active sites that enhance electrocatalytic behavior. Nevertheless, inducing rapid and in-depth self-reconstruction of catalyst surfaces remains a huge challenge. Herein, this work achieves rapid and in-depth self-reconstruction by doping fluorine into the lattice of transition metal oxides (MO). As surface restructuring progresses, the continuous leaching of F<sup>-</sup> ions by the alkaline electrolyte generates OH<sup>-</sup> ions rapidly, which facilitates the transformation from MO to M-OOH active species, thereby exposing additional active sites. Meanwhile, F doping shifts the d-band center closer to the Fermi level while increasing the occupancy of Ni and Co d-orbitals, leading to a redistribution of electronic density and enhanced spin polarization. Additionally, the significant increase in the energy levels of the e<sub>g</sub> and t<sub>2g</sub> orbitals strengthens d-d orbital coupling, optimizing the adsorption energy of oxygen-containing species and facilitating catalyst surface reconstruction. Accordingly, the catalysts require a remarkably low overpotential of 247 mV to achieve a current density of 10 mA cm<sup>-2</sup>. Overall, this work provides a valuable approach for constructing pre-catalysts capable of rapid and in-depth self-reconstruction during the OER process.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"84-94"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alkane selection as a critical factor in structuring reverse wormlike micelles. 烷烃选择是构造反向虫状胶束的关键因素。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-11 DOI: 10.1016/j.jcis.2025.01.085
Hilda Camila Nascimento Nogueira, Laura Caetano Escobar da Silva, Tomás Sigfrido Plivelic, Viviane Lutz-Bueno, Edvaldo Sabadini
{"title":"Alkane selection as a critical factor in structuring reverse wormlike micelles.","authors":"Hilda Camila Nascimento Nogueira, Laura Caetano Escobar da Silva, Tomás Sigfrido Plivelic, Viviane Lutz-Bueno, Edvaldo Sabadini","doi":"10.1016/j.jcis.2025.01.085","DOIUrl":"10.1016/j.jcis.2025.01.085","url":null,"abstract":"<p><strong>Hypothesis: </strong>The oil phase controls the persistence length and aqueous channel diameter of reverse wormlike micelles (RWLMs), specifically by tuning the cohesive energy density of alkanes.</p><p><strong>Experiments: </strong>We explore the influence of alkanes with varying chain lengths on the rheological properties, structural parameters, and morphology of RWLMs. To establish a link between the solvent characteristics and the structure of RWLMs, we employ a diverse set of complementary techniques, including rheological analysis, small-angle X-ray scattering (SAXS), Fourier-transform infrared (FT-IR) spectroscopy, and cryogenic transmission electron microscopy (cryo-TEM).</p><p><strong>Findings: </strong>Our results show that the cross-sectional area and persistence length of reverse wormlike micelles (RWLMs) are influenced by the chain length of the alkanes in which the long aggregates are formed. We propose a model based on the Hildebrand solubility parameter to explain this behavior, where alkanes with higher cohesive energy density led to RWLMs with narrower aqueous channels. Selecting specific alkanes makes it possible to fine-tune the diameter of these channels, presenting promising opportunities for designing RWLMs tailored to confined media applications.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"170-180"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An emodin-mediated multifunctional nanoplatform with augmented sonodynamic and immunoregulation for osteomyelitis therapy. 具有增强声动力和免疫调节的大黄素介导的多功能纳米平台用于骨髓炎治疗。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-13 DOI: 10.1016/j.jcis.2025.01.094
Zehao Li, Ying Lu, Jianbo Song, Peide Han, Huixian Shi, Xiaohong Yao, Xiangyu Zhang, Guannan Zhang
{"title":"An emodin-mediated multifunctional nanoplatform with augmented sonodynamic and immunoregulation for osteomyelitis therapy.","authors":"Zehao Li, Ying Lu, Jianbo Song, Peide Han, Huixian Shi, Xiaohong Yao, Xiangyu Zhang, Guannan Zhang","doi":"10.1016/j.jcis.2025.01.094","DOIUrl":"10.1016/j.jcis.2025.01.094","url":null,"abstract":"<p><p>Emodin (ED), as a traditional Chinese medicine, possesses a variety of biological activities and is also one of natural sonosensitizer. Whether emodin could react with titanium dioxide to enhance the sonodynamic activity for safely treating osteomyelitis remains to be explored. Hence, an ED-conjugated Mn-doped titanium dioxide (TOM) nanorod array is designed and prepared on titanium to eliminate bacterial infections under ultrasound (US) treatment. The doping of Mn and the formation of an inorganic-organic interfacial between ED and TOM cause an imbalance in the interfacial charge and reduce the band gap of TOM, thereby increasing the production of reactive oxygen species (ROS) under US. The generated ROS effectively destroys the bacterial cell membrane, accelerating Mn ions intake and thereby inducing ferroptosis-like death of MRSA. Moreover, the hybrid coating activates cAMP and cGMP-PKG pathways to modulate M1 polarization of macrophages to display potent phagocytosis to bacteria. After eliminating the bacterial infection, the coating also can facilitate macrophage M2 polarization to promote osteogenic differentiation. Overall, the Chinese medicine enhanced sonodynamic and immunotherapy have great promise in treating bacterial-infected osteomyelitis.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"122-137"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biliquid oil-in-water nanofoams and spontaneous emulsification obtained with a surfactant resistant to curvature changes. 用抗曲率变化的表面活性剂制备了水包油纳米泡沫和自发乳化。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-13 DOI: 10.1016/j.jcis.2025.01.090
Patrick Denk, Selina Reigl, Bastian Rödig, Michael Sztucki, Sylvain Prévost, Thomas Zemb, Werner Kunz
{"title":"Biliquid oil-in-water nanofoams and spontaneous emulsification obtained with a surfactant resistant to curvature changes.","authors":"Patrick Denk, Selina Reigl, Bastian Rödig, Michael Sztucki, Sylvain Prévost, Thomas Zemb, Werner Kunz","doi":"10.1016/j.jcis.2025.01.090","DOIUrl":"10.1016/j.jcis.2025.01.090","url":null,"abstract":"<p><strong>Hypothesis: </strong>Due to its huge polar headgroup, octaoxyethylene octyl ether carboxylic acid (C<sub>8</sub>E<sub>8</sub>CH<sub>2</sub>COOH = Akypo LF2™) is supposed not to be able to change its curvature sufficiently to form bicontinuous microemulsions. Instead, upon adding an oil to the binary water - surfactant system, excess oil could be squeezed out or a biliquid foam could form.</p><p><strong>Experiments: </strong>An auto-dilution setup was used to record small-angle X-ray scattering data along six dilution lines in the newly established phase diagram of the ternary system 2-ethylhexanol - C<sub>8</sub>E<sub>8</sub>CH<sub>2</sub>COOH - water.</p><p><strong>Results: </strong>Evaluation of the data in combination with the recorded phase diagram revealed that the ternary microemulsions with a slightly amphiphilic oil indeed do not show a classical structural inversion via a bicontinuous structure with increasing oil content, but instead the sequence: O/W micelles - O/W biliquid nanofoam - molecular co-solubilization in the oil phase. The biliquid nanofoam structure with 10<sup>2</sup>-10<sup>4</sup> oil molecules enclosed by locally flat layers of interdigitated hydrated headgroups exists in the middle of the phase diagram. We may speculate that this phase can be used as a multitude of nanocontainers, e.g., for chemical reactions in an aqueous environment, but with negligible water chemical potential. In the vicinity of the critical point, spontaneous formation of stable mesoscale droplets (an \"Onuki-like\" structure, as known with antagonistic salts) is detected in a region showing a pronounced Tyndall effect.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"105-121"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing catalytic activity in Mo2C nanodots via nitrogen doping and graphene integration for efficient hydrogen evolution under alkaline conditions. 通过氮掺杂和石墨烯集成增强Mo2C纳米点在碱性条件下高效析氢的催化活性。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-11 DOI: 10.1016/j.jcis.2025.01.073
Nannan Liang, Haifeng Xu, Haining Zhang, Zhiwei Zhang, Miao Wang, Zhong Jin
{"title":"Enhancing catalytic activity in Mo<sub>2</sub>C nanodots via nitrogen doping and graphene integration for efficient hydrogen evolution under alkaline conditions.","authors":"Nannan Liang, Haifeng Xu, Haining Zhang, Zhiwei Zhang, Miao Wang, Zhong Jin","doi":"10.1016/j.jcis.2025.01.073","DOIUrl":"10.1016/j.jcis.2025.01.073","url":null,"abstract":"<p><p>Due to its exceptional electronic properties and catalytic activity, Mo<sub>2</sub>C has garnered significant attention for its application in electrocatalysis, particularly for the hydrogen evolution reaction (HER). However, several critical challenges continue to impede its widespread use, especially under strongly alkaline conditions. A primary obstacle is the enhancement of its intrinsic activity through further modification strategies, which remains a key limitation for its broader utilization. Additionally, issues related to poor stability and durability during prolonged electrochemical tests raise concerns about the practical viability of Mo<sub>2</sub>C -based electrocatalysts. In this work, we present a novel strategy to enhance the electrocatalytic performance of Mo<sub>2</sub>C nanodots for HER through the synergistic modification involving nitrogen doping and graphene incorporation. The incorporation of nitrogen into the Mo<sub>2</sub>C structure significantly alters its electronic properties, leading to an increased density of active sites and improved conductivity. When further combined with graphene, the resulting N-Mo<sub>2</sub>C-NDs@graphene composite catalyst exhibits remarkable electrochemical HER performances in 1 M KOH electrolyte, achieving a low overpotential of 84 mV at 10 mA cm<sup>-2</sup> and a reduced Tafel slope of 74 mV dec<sup>-2</sup>, along with excellent long-term stability test. Computational analyses reveal that that incorporating nitrogen and graphene significantly reduces the free energy of intermediate states (*H<sub>2</sub>O), thereby enhancing the electrocatalytic HER activities. These findings highlight the potential of designing advanced transition metal carbides-based composite electrocatalysts via synergistic approaches for energy conversion applications.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"1-9"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inserted-B atoms modulating electronic structure of Pt enhancing hydrogen evolution under Universal-pH. 插入- b原子调制Pt的电子结构,在通用ph下促进析氢。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-13 DOI: 10.1016/j.jcis.2025.01.092
Haoran Jiang, Yong Xiao, Zhirang Liu, Zichen Wang, Bojian Wei, Qiliang Wei, Niancai Cheng
{"title":"Inserted-B atoms modulating electronic structure of Pt enhancing hydrogen evolution under Universal-pH.","authors":"Haoran Jiang, Yong Xiao, Zhirang Liu, Zichen Wang, Bojian Wei, Qiliang Wei, Niancai Cheng","doi":"10.1016/j.jcis.2025.01.092","DOIUrl":"10.1016/j.jcis.2025.01.092","url":null,"abstract":"<p><p>The development of high-performance electrocatalysts for hydrogen evolution reaction (HER) in different pH conditionsis pivotal in producing green hydrogen, but remains challenging. Herein, we regulate the p-d orbitals hybridization between B and Pt for effective and durable HER at all pH ranges by controlling the inserted B atom. Consequently, the optimized B-doped Pt catalysts with 20 at.% B content (Pt80B20/C) has the highest HER performance, with only 7 mV overpotential in acidic conditions, 37 mV in alkaline media, and 47 mV in neutral media, more remarkably, have negligible attenuation during electrolysis up to 100 h, which is superior to commercial Pt/C catalysts. Theoretical calculations revealed that by inserting appropriate B atoms in the interstitial vacancies of Pt, the electronic structure of Pt is suitable for providing appropriate hydrogen intermediates (H*) adsorption/desorption strength, resulting in superior acid HER electrocatalyst performance. Besides, a strong electronic interaction existed between Pt and inserted-B atoms leaving Pt sites in an electron deficiency state, which facilitates the bond cleavage of the H-OH of H<sub>2</sub>O, hence accelerating water dissociation and promoting neutral/alkaline HER dynamics.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"95-104"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced Polysulfide conversion in Room-Temperature Sodium-Sulfur batteries via nanoscale TiO2 modified porous carbon structures. 纳米TiO2修饰多孔碳结构增强室温钠硫电池中多硫化物转化。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-10 DOI: 10.1016/j.jcis.2025.01.068
Runze Ma, Limou Zhang, Yujie Shi, Yujun Fu, Dongjiao Wang, Ting Wang, Gang Yang, Junfei Zhang, Liang Wu, Dequan Liu, Ying Wu, Deyan He
{"title":"Enhanced Polysulfide conversion in Room-Temperature Sodium-Sulfur batteries via nanoscale TiO<sub>2</sub> modified porous carbon structures.","authors":"Runze Ma, Limou Zhang, Yujie Shi, Yujun Fu, Dongjiao Wang, Ting Wang, Gang Yang, Junfei Zhang, Liang Wu, Dequan Liu, Ying Wu, Deyan He","doi":"10.1016/j.jcis.2025.01.068","DOIUrl":"10.1016/j.jcis.2025.01.068","url":null,"abstract":"<p><p>Room-temperature sodium-sulfur (RT Na-S) batteries, known for their high-energy density, low cost and environmental friendliness, have attracted much attention. However, the development of RT Na-S batteries has encountered a number of challenges, including low conductivity and large volume changes of sulfur during the charge-discharge cycles. In this study, TiO<sub>2</sub> nanoparticles modified porous carbon hosts for sulfur in RT Na-S batteries were prepared by a simple and efficient spray drying method combined with solution immersion. This approach significantly improved the electrochemical performance of RT Na-S batteries, especially under high current density (200 mAh/g capacity after 200 cycles at 5.0 A/g) and under high load (250 mAh/g capacity after 80 cycles at 0.5 A/g, the mass load is 3.7 mg cm<sup>-2</sup>). TiO<sub>2</sub> modified porous carbon cathode not only had effective adsorption effect on polysulfides, but also showed strong catalytic ability of sulfur to Na<sub>2</sub>S<sub>x</sub> and Na<sub>2</sub>S<sub>x</sub> to Na<sub>2</sub>S in sulfur conversion reaction.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"235-242"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase transitions and morphology control of Langmuir Blodget (LB) films of graphene oxide. 氧化石墨烯Langmuir Blodget (LB)膜的相变和形貌控制。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-09 DOI: 10.1016/j.jcis.2025.01.044
Jongdeok Park, Md Mahbubur Rahman, Sang Jung Ahn, Jae-Joon Lee
{"title":"Phase transitions and morphology control of Langmuir Blodget (LB) films of graphene oxide.","authors":"Jongdeok Park, Md Mahbubur Rahman, Sang Jung Ahn, Jae-Joon Lee","doi":"10.1016/j.jcis.2025.01.044","DOIUrl":"10.1016/j.jcis.2025.01.044","url":null,"abstract":"<p><strong>Hypothesis: </strong>Understanding the Langmuir film formation process of flexible and soft materials like graphene oxide (GO) is essential, as it shows different trends compared to the conventional surface pressure-area (π-A) and compressional modulus (ε) isotherms of hard materials. Additionally, the size distribution and mechanical properties of the GO are assumed to affect the distinctive Langmuir-Blodgett (LB) film morphologies, such as overlaps and wrinkles.</p><p><strong>Experiment: </strong>To gain a deeper insights of phase transitions in GO LB films, we propose a novel analysis of elastic tensile modulus versus surface pressure (|ε|-π) isotherms. This approach involves applying adequate compression to the GO sheets to generate an elastic force, followed by measuring the |ε|-π isotherms during the film's expansion. Additionally, we compared the surface morphology of GO LB films deposited under identical conditions using various GO colloidal solutions, each containing sheets with different size distributions.</p><p><strong>Finding: </strong>Upon expanding the GO Langmuir film after sufficient compression, a rapid stress release is observed leading to a clear inflection in the |ε|-π isotherms, indicating a phase transition from solid to liquid. Therefore, this study provides comprehensive insights into the behavior of GO Langmuir films. Furthermore, we demonstrated that morphological features, such as wrinkles and overlaps in GO LB films, can be effectively controlled by adjusting the size distribution and mechanical properties of GO sheets in the colloidal solution.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"215-224"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ag-boosted hydroxyl adspecies generation and carbonyl intermediates release for Pt-Ag-catalyzed ethylene glycol electro-oxidation. ag催化乙二醇电氧化的氢氧自由基生成和羰基中间体释放。
IF 9.4 1区 化学
Journal of Colloid and Interface Science Pub Date : 2025-04-15 Epub Date: 2025-01-04 DOI: 10.1016/j.jcis.2025.01.009
Lin Huang, Maoqing Chen, Ying Yang, Qingshou Zheng, Li Gu, Ruobing Cheng, Xuebo Cao
{"title":"Ag-boosted hydroxyl adspecies generation and carbonyl intermediates release for Pt-Ag-catalyzed ethylene glycol electro-oxidation.","authors":"Lin Huang, Maoqing Chen, Ying Yang, Qingshou Zheng, Li Gu, Ruobing Cheng, Xuebo Cao","doi":"10.1016/j.jcis.2025.01.009","DOIUrl":"10.1016/j.jcis.2025.01.009","url":null,"abstract":"<p><p>Electro-reforming of organics such as alcohols into commodity chemicals and H<sub>2</sub> powered by renewables is intriguing and prevailing with the remarkable renaissance of electrochemical technology. Integrating Pt/Pd with an auxiliary metal, metal oxide, and metal hydroxide are feasible strategies to design the desirable catalysts toward alcohols electro-oxidation reactions. These catalysts however have high affinity toward carbonyl intermediates that occupy and poison the active sites. Thus, the target products suffer from poor selectivity. To address these issues, a facile binary Pt-Ag alloy nanowires (NWs) catalytic system was reported for efficient electro-oxidative reforming of ethylene glycol (EG), yielding glycolate with a selectivity of 91.5 %, an EG conversion of 96.4 %, and Faradaic efficiency (FE) of 87.4 %. Experimental and theoretical investigations revealed that Ag-induced electronic structure perturbations in Pt<sub>0.66</sub>Ag catalyst boosted the kinetics and robustness as a conventional promoter toward EG electro-oxidation reaction (EGOR). Moreover, the one-electron oxidation of water/hydroxide ion to generate abundant hydroxyl adspecies (OH<sub>ad</sub>) on Ag served as another crucial promoter for efficient dehydrogenation, glycolate formation, and carbonyl intermediates release via a highly efficient, noncompetitive Langmuir-Hinshelwood (L-H) mechanism, but not the competitive L-H mechanism or the Eley-Rideal (E-R) mechanism. These findings provide new insights into the selective alcohol electro-oxidation reaction, and facilitate the generation of commodity chemicals via partial electro-oxidation reactions.</p>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":"684 Pt 2","pages":"197-206"},"PeriodicalIF":9.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142997636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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