Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

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Seed-mediated growth of flexible Ag NFs with high activity and their application for SERS detection of thiram in tomato juice 高活性柔性Ag NFs种子介导生长及其在番茄汁中硫胺SERS检测中的应用
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137224
Li Sun , Zheng Ye , Yuan Zhi , Hua Zhang , Binlin Dou , Yuejin Shan , Jian Chen
{"title":"Seed-mediated growth of flexible Ag NFs with high activity and their application for SERS detection of thiram in tomato juice","authors":"Li Sun ,&nbsp;Zheng Ye ,&nbsp;Yuan Zhi ,&nbsp;Hua Zhang ,&nbsp;Binlin Dou ,&nbsp;Yuejin Shan ,&nbsp;Jian Chen","doi":"10.1016/j.colsurfa.2025.137224","DOIUrl":"10.1016/j.colsurfa.2025.137224","url":null,"abstract":"<div><div>In this study, a prospective strategy on seed-mediated growth in vacuum is provided and used to prepare flexible silver nanofilms (AC<sub>0–3</sub> NFs) with high purity, crystallinity and SERS performance. Noteworthy, AC<sub>2</sub> NFs surface is uniformly covered with silver nanoparticles (Ag NPs), following the appearance of numerous nano-gaps between Ag NPs. Through the finite-difference time-domain (FDTD) simulation, it is found that the ultra-small nano-gaps less than 5 nm can generate abundant “hot spots” to amplify the Raman signal. Therefore, the above AC<sub>2</sub> NFs as SERS substrates exhibit superior activity for the SERS detection of thiram in tomato juice, with the limit of detection (LOD) of 10<sup>−15</sup> M and the enhancement factor (EF) of 3.7 × 10<sup>11</sup>. Meanwhile, AC<sub>2</sub> NFs show outstanding reproducibility and stability during the SERS detection. Additionally, the calibration curve is established, by which the thiram (10<sup>−7</sup> to 10<sup>−15</sup> M) can be quantitatively detected. Clearly, the as-prepared flexible AC<sub>2</sub> NFs have great potential in the SERS detection and analysis.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137224"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
The mechanism of glutenin-tannic acid nanoparticles in improving the storage instability of glutenin emulsion: Based on interactions, nanoparticle property, and interface property 谷蛋白-单宁酸纳米颗粒改善谷蛋白乳液贮存不稳定性的机理:基于相互作用、纳米颗粒性质和界面性质
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137219
Bin Zhou , Peiyu Yang , Qiuyue Hou , Bing Cui , Hongshan Liang , Bin Li , Xin Shi
{"title":"The mechanism of glutenin-tannic acid nanoparticles in improving the storage instability of glutenin emulsion: Based on interactions, nanoparticle property, and interface property","authors":"Bin Zhou ,&nbsp;Peiyu Yang ,&nbsp;Qiuyue Hou ,&nbsp;Bing Cui ,&nbsp;Hongshan Liang ,&nbsp;Bin Li ,&nbsp;Xin Shi","doi":"10.1016/j.colsurfa.2025.137219","DOIUrl":"10.1016/j.colsurfa.2025.137219","url":null,"abstract":"<div><div>The strong hydrophobicity of glutenin (Gln) limits its application as a food emulsifier. To address this, we hypothesized that hydrophilic tannic acid (TA) could interact with glutenin to enhance the stability of glutenin emulsions. The mechanism of Gln-TA nanoparticles in improving emulsion stability was explored through synergistic analysis of interactions, nanoparticle characteristics, and interfacial properties. These results revealed that the formation of Gln-TA nanoparticles was primarily driven by hydrogen bonding and hydrophobic interactions. The incorporation of tannic acid enhanced both the short-term and long-term stability of glutenin emulsions, though their effects and mechanisms differed significantly. Specifically, the ability of Gln-TA nanoparticles to improve short-term emulsion stability exhibited a distinct tannic acid concentration dependence. When the tannic acid concentration reached 24.0 μmol/L, Gln-TA nanoparticles achieved the smallest particle size (247.8 nm) and the highest mechanical strength of interfacial layers, yielding the optimal short-term emulsion stability. In contrast, Gln-TA nanoparticles at a tannic acid concentration of 19.2 μmol/L exhibited the best long-term emulsion stability, which was attributed to their superior amphiphilicity and interfacial deformation resistance. This study would provide new insights into the mechanism by which Gln-TA nanoparticles enhance emulsion storage stability and establish a theoretical foundation for developing health-beneficial protein emulsifiers.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137219"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Natural formation of protective film for mild steel corrosion in sodium chloride containing saturated carbon dioxide medium using lanthanum (III) chloride 用氯化镧(III)在含饱和二氧化碳的氯化钠介质中自然形成低碳钢腐蚀保护膜
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137208
Thi-Bich-Ngoc Dao , Kim-Long Duong-Ngo , Thanh Liem Huynh , Thanh-Nha Tran , Thanh Trung Pham , Minji Kim , Thi Nhung Nguyen , Nam Nguyen Dang
{"title":"Natural formation of protective film for mild steel corrosion in sodium chloride containing saturated carbon dioxide medium using lanthanum (III) chloride","authors":"Thi-Bich-Ngoc Dao ,&nbsp;Kim-Long Duong-Ngo ,&nbsp;Thanh Liem Huynh ,&nbsp;Thanh-Nha Tran ,&nbsp;Thanh Trung Pham ,&nbsp;Minji Kim ,&nbsp;Thi Nhung Nguyen ,&nbsp;Nam Nguyen Dang","doi":"10.1016/j.colsurfa.2025.137208","DOIUrl":"10.1016/j.colsurfa.2025.137208","url":null,"abstract":"<div><div>Carbon dioxide (CO<sub>2</sub>) corrosion on metallic materials, especially mild steel, is the major concern to various industrial sectors as continuously exposed to different environmental conditions, which causes damages related to loss of materials, environment and finance. Finding an effective method to improve corrosion resistance, enhance durability, and even reduce maintenance costs for mild steel-based components is always an urgent requirement. Beyond increased applicability and extended lifespan of steel-based infrastructures, maintaining sustainability and environmental friendliness of the methods used is relatively important. Motivated by this direction, this work uses lanthanum (III) chloride (LaCl<sub>3</sub>) as a corrosion inhibitor on mild steel in the 0.01 M NaCl solution saturated with CO<sub>2</sub>. By combining surface characterizations and electrochemical measurements, electrochemical behaviors of mild steel and the effects of the inhibitor on electrochemical activities of steel are clearly demonstrated. Surface characterizations including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) are applied to observe and analyze the steel surface after immersion in the prepared solution without and with varying concentrations of the inhibitor for 72 hours. The results show the film formation of lanthanum-based compounds on the steel surface probably reduces localized corrosion and minimizes porous flakes on the steel surface. Additionally, the electrochemical measurements, including potentiodynamic polarization (PD) and electrochemical impedance spectroscopy (EIS), indicate that LaCl<sub>3</sub> acts a mixed-type inhibitor that prevents both anodic and cathodic reactions on the metal surface in the electrolyte, with the highest inhibition efficiency achieving 95.97 ± 0.41% at 2.4 mM LaCl<sub>3</sub>. The film formation of the inhibitor based on the heterogenous monolayer adsorption is demonstrated by isotherm adsorption. Moreover, the wire beam electrode (WBE) mapping based on current density is used and the results obtained show the inhibitor can influence on random distribution of anodic and cathodic sites on the steel surface, suggesting localized corrosion inhibition of LaCl<sub>3</sub> in CO<sub>2</sub>-saturated NaCl solution.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137208"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Facile preparation method of robust superhydrophobic coatings based on double layers and multistage complementary structures 基于双层多级互补结构的坚固超疏水涂层的简易制备方法
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137222
Yuxin Li, Han Zhou, Zhenzhen Lu
{"title":"Facile preparation method of robust superhydrophobic coatings based on double layers and multistage complementary structures","authors":"Yuxin Li,&nbsp;Han Zhou,&nbsp;Zhenzhen Lu","doi":"10.1016/j.colsurfa.2025.137222","DOIUrl":"10.1016/j.colsurfa.2025.137222","url":null,"abstract":"<div><div>This study designed a novel double-layer structured superhydrophobic coating with exceptional wear resistance and dynamic impact resistance. Sand particles were employed as \"armor\" and a hydrophobic adhesive layer was employed as the bonding layer. The synergistic effect of the chemical components and optimized rough structures enhances the coating’s resistance to external stress and wear. Results shows that the coating maintains its superhydrophobicity after 150 cycles of sandpaper abrasion under a 300 g load, accompanied by a decrease of only 6 % of the contact angle. Also, the coating exhibits remarkable impact resistance to water impact, retaining contact angles above 153° and 151° after 16 hours of water droplet penetration and 12 hours of water jet impact, respectively. Additionally, the coating maintains its superhydrophobicity after chemical attack. UV aging and high-low temperature cycling tests indicate good outdoor environmental adaptation characteristics. Furthermore, the prepared samples exhibit excellent durability and stability after 180 days of outdoor exposure. These outstanding properties can be attributed to the robust double-layer, double-scale structure of the composite coating, as well as the low surface energy and mechanical stability provided by the modifiers. With its exceptional mechanical properties, excellent chemical durability, and strong adaptability to outdoor conditions, the double-layer superhydrophobic composite coating demonstrates remarkable durability and excellent practicality. It holds significant potential for practical applications, particularly in challenging environments.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137222"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Construction of deep eutectic solvents for high efficiency extraction of polycyclic aromatic hydrocarbons 高效萃取多环芳烃的深共晶溶剂的构建
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137218
Xiaosi Sun , Peng Cui , Peiwen Wu , Kaihao Mo , Hanyu Zhang , Hao Ren , Haiyan Ji , Wenshuai Zhu , Zhichang Liu
{"title":"Construction of deep eutectic solvents for high efficiency extraction of polycyclic aromatic hydrocarbons","authors":"Xiaosi Sun ,&nbsp;Peng Cui ,&nbsp;Peiwen Wu ,&nbsp;Kaihao Mo ,&nbsp;Hanyu Zhang ,&nbsp;Hao Ren ,&nbsp;Haiyan Ji ,&nbsp;Wenshuai Zhu ,&nbsp;Zhichang Liu","doi":"10.1016/j.colsurfa.2025.137218","DOIUrl":"10.1016/j.colsurfa.2025.137218","url":null,"abstract":"<div><div>Polycyclic aromatic hydrocarbons (PAHs) are serious organic pollutions and important industrial raw materials which are abundant in fluid catalytic cracking (FCC) diesel. Therefore, it is necessary to find suitable approach to remove PAHs from FCC diesel under mild condition. In this study, a series of deep eutectic solvents (DESs) were designed and synthesized as PAHs extractants. The tetraoctyl ammonium bromide (TOAB) and ethylene glycol (EG) with the molar ratio of 1:2, TOAB:2EG, exhibited great single extraction efficiency towards naphthalene (NAP, 55.6 %) and anthracene (ANT, 92.3 %). The orthogonal experiment proved the alkyl chain length of quaternary ammonium salt influenced PAHs extraction mostly. The high extraction efficiency was attributed to the hydrogen bonds, p-π and π-π interactions between PAHs and DESs. This work advances the DESs as PAHs extractants with high extraction efficiency and broadens the applications of DESs.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137218"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Revolutionizing self-healing materials: Complex micro-containers (CMC) for delivery of compartmentalized reactive agents 革命性的自我修复材料:复杂的微容器(CMC),用于递送区隔化的反应剂
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137213
Katerina Stamer , Madina Baltaeva , Maxim Orlov , Vikrant Wagle , Abdullah Yami
{"title":"Revolutionizing self-healing materials: Complex micro-containers (CMC) for delivery of compartmentalized reactive agents","authors":"Katerina Stamer ,&nbsp;Madina Baltaeva ,&nbsp;Maxim Orlov ,&nbsp;Vikrant Wagle ,&nbsp;Abdullah Yami","doi":"10.1016/j.colsurfa.2025.137213","DOIUrl":"10.1016/j.colsurfa.2025.137213","url":null,"abstract":"<div><div>This study presents a Complex Micro-Container (CMC) system designed to transport compartmentalized reaction mixtures containing healing agents. Specifically designed for cementing operations in the oil and gas industry, the CMCs exhibit an autonomous ability to effect successful cement restoration. This is achieved by a mechanism that involves the in-situ formation of a self-expanding polyurethane foam following the rupture of the CMCs and the subsequent cross-linking reaction between the healing agents. The CMC system, consisting of polyurea microcapsules with curing agent embedded in a reactive monomer and encapsulated in an outer polyurethane shell, undergoes a two-step interfacial polymerization process. The system structure is characterized by Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric and differential thermal analyzes (TGA and DTA), and scanning electron microscopy (SEM). Examination of the foam generated by the CMCs reveals an increase in initial volume of up to 165 %, highlighting the inherent expansion capacity of the system. Furthermore, computed tomography studies confirm the complete visual sealing of cracks using computer tomography technique and 19 % restoration of the compressive strength within the cement body loaded with only 5 % wt. CMCs. The synthesized material is shown to be a highly effective means of imparting self-healing properties to cement, which holds great promise for applications in the oil and gas industry by reducing the financial burden associated with costly repairs resulting from cementing failures, while improving well integrity.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137213"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Solvent-free preparation of superhydrophobic and photocatalytic monoliths for water treatment applications 水处理应用超疏水和光催化单体的无溶剂制备
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137227
Nusret Celik , Sultan Karagoz , Menekse Sakir , Erkan Yilmaz , Aziz Genc , Thomas J.A. Slater , Mustafa Serdar Onses
{"title":"Solvent-free preparation of superhydrophobic and photocatalytic monoliths for water treatment applications","authors":"Nusret Celik ,&nbsp;Sultan Karagoz ,&nbsp;Menekse Sakir ,&nbsp;Erkan Yilmaz ,&nbsp;Aziz Genc ,&nbsp;Thomas J.A. Slater ,&nbsp;Mustafa Serdar Onses","doi":"10.1016/j.colsurfa.2025.137227","DOIUrl":"10.1016/j.colsurfa.2025.137227","url":null,"abstract":"<div><div>Sustainable and practical preparation of nanostructured materials with superhydrophobicity and photocatalytic activity remains a persistent challenge for a diverse range of applications including water treatment and self-cleaning surfaces. This study reports solvent-free mechanochemical grafting of polydimethylsiloxane to photocatalytic TiO<sub>2</sub> nanoparticles with a diameter of 21 nm and generation of a monolithic material with demonstrated use in adsorption and degradation of organic pollutants. The monolith exhibited bulk superhydrophobicity with a water contact angle of 172⁰ and sliding angle of 1⁰. At the same time, the monolith effectively degraded organic pollutants such as methylene blue, under UV light with 92 % efficiency in 7 h. Furthermore, the superhydrophobic monolith demonstrated effective sorption of hexane, toluene, sunflower oil and pump oil from water with efficiencies approaching 90 %. These findings demonstrate the promise of solvent-free mechanochemical processes in developing nanostructured materials for water treatment applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137227"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Oil detachment and wettability reversal mechanism by gemini surfactants and divalent ions on oil-wet quartz surfaces 双子表面活性剂和二价离子在亲油石英表面的脱油和润湿性逆转机理
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137221
Zechen Yan , Xiaofang Li , Lin Zhang , Kangxing Wei , Lei Zhu , Tianci Huo , Chao Yan , Qingzhong Xue
{"title":"Oil detachment and wettability reversal mechanism by gemini surfactants and divalent ions on oil-wet quartz surfaces","authors":"Zechen Yan ,&nbsp;Xiaofang Li ,&nbsp;Lin Zhang ,&nbsp;Kangxing Wei ,&nbsp;Lei Zhu ,&nbsp;Tianci Huo ,&nbsp;Chao Yan ,&nbsp;Qingzhong Xue","doi":"10.1016/j.colsurfa.2025.137221","DOIUrl":"10.1016/j.colsurfa.2025.137221","url":null,"abstract":"<div><div>Surfactant flooding and ion-engineered waterflooding are promising techniques for reversing the wettability of sandstone reservoirs to enhance oil recovery. In this work, the wettability alteration process on oil-wet quartz surface by different surfactants (gemini, anionic, zwitterionic, and nonionic type) and ions in brine (Na<sup>+</sup>, Cl<sup>-</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, and SO<sub>4</sub><sup>2-</sup>) has been investigated using the molecular dynamics simulation method. The results show that the initial quartz surface exhibits oil-wetness because the basic protonated decylamines component in crude oil could be adsorbed onto the rock surface through hydrogen bonding and electrostatic interaction between oil and quartz surface. By contrast, anionic sulfonate gemini surfactant with higher charge density has better wettability reversal ability, which could make quartz surfaces more water-wet due to the strong ion pair, hydrogen bonding and electrostatic repulsion effect between gemini surfactant and crude oil. Additionally, Ca<sup>2+</sup> could fully occupy negatively charged oil-wet sites of the quartz surface by the multiple ion exchange process, promoting the detachment of oil droplets. This study reveals that gemini surfactant and Ca<sup>2+</sup> cations are suitable for effective wettability reversal, which would provide valuable guidance to design and optimize chemical formulations of the sandstone reservoir for enhanced oil recovery.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137221"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
A shell passivation strategy for micro-scale aluminum particles and power generation applications 微尺度铝粒子壳钝化策略及发电应用
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137200
Mahmuda Ishrat Malek, Cason Jones, Wyatt Benson, Michelle L. Pantoya
{"title":"A shell passivation strategy for micro-scale aluminum particles and power generation applications","authors":"Mahmuda Ishrat Malek,&nbsp;Cason Jones,&nbsp;Wyatt Benson,&nbsp;Michelle L. Pantoya","doi":"10.1016/j.colsurfa.2025.137200","DOIUrl":"10.1016/j.colsurfa.2025.137200","url":null,"abstract":"<div><div>Aluminum (Al) particles are widely used as solid fuels in energy generating applications such as rocket propellants, batteries, and powering MEMS devices. The particles are naturally a core-shell composite of aluminum-alumina (Al<sub>2</sub>O<sub>3</sub>). The passivation shell is a strong barrier to oxygen diffusion and thus limits power generation potential. Recent studies on nano-aluminum (nAl) particles replaced the Al<sub>2</sub>O<sub>3</sub> shell with an oxygen-rich, halogen-based shell composed of [Al(H<sub>2</sub>O)<sub>6</sub>](IO<sub>3</sub>)<sub>3</sub>(HIO<sub>3</sub>)<sub>2</sub> called aluminum iodate hexahydrate (AIH). The abundance of oxidizing species in molecular scale proximity to the Al core, and the relatively low decomposition energy of AIH provided the conditions necessary to increase power from the nAl reactions. However, AIH passivated nAl was highly ignition sensitive and unsafe to handle. Micron-sized aluminum (µAl) particles are less ignition sensitive than nAl particles and are a suitable alternative for extending nAl-shell modification approaches. This study used µAl particles to synthesize a controlled concentration of AIH shell (µAl@AIH). The precipitation reactions required for shell synthesis examined three key variables to control AIH concentration: H<sub>2</sub>O to I<sub>2</sub>O<sub>5</sub> solution ratio, solution temperature, and time in solution. Thermal analysis of the µAl@AIH particles confirmed AIH dehydration and decomposition followed by core oxidation. The µAl@AIH powder showed up to 92 % increase in apparent oxidation efficiency compared to standard Al indicating the AIH shell provides increased oxygen accessibility to the core. Accelerated aging studies revealed physical and chemical transformation of AIH, but the new shell structure resulted in a further 1992 % increased apparent oxidation efficiency than standard Al. The apparent activation energy for the unaged and aged µAl@AIH powder is 16–34 % lower in equilibrium and non-equilibrium conditions compared to standard Al. The results shown here pave the way for the development of new solid fuels with tremendous power generation capabilities compared to the yesteryear particles plagued by a nearly impenetrable native oxidation passivation layer crippling the speed of energy release.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"721 ","pages":"Article 137200"},"PeriodicalIF":4.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Control of phosphorus release from sediment by nitrate-loaded ferrihydrite in the absence and presence of tetracycline input 在没有和存在四环素输入的情况下,硝酸盐负载水合铁控制沉积物中磷的释放
IF 4.9 2区 化学
Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-14 DOI: 10.1016/j.colsurfa.2025.137223
Jiawei Ye, Jianwei Lin, Yanhui Zhan
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