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Water-stable halide perovskite nanocomposite with dual S-scheme for enhanced photocatalysis 具有双s方案的水稳定卤化物钙钛矿纳米复合材料增强光催化
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-07-22 DOI: 10.1016/j.jiec.2025.07.051
Walaa Omer , Hamza El-Hosainy , Haitham M. El-Bery , Maged El-Kemary
Lead-free halide perovskites, particularly Cs2AgBiBr6, have gained attention as promising photocatalysts due to their excellent light absorption and tunable photo-responsive properties. However, their practical application is hindered by poor stability in aqueous media and reduced efficiency in high-water environments, where Cs2AgBiBr6 undergoes self-passivation by forming BiOBr, significantly decreasing its photocatalytic activity when water content exceeds 50 vol%. To overcome these limitations, we in situ coupled Cs2AgBiBr6 nanoplatelets (NPLs) with g-C3N4, forming a stable Cs2AgBiBr6 NPLs@g-C3N4@AgBr ternary composite in water (100 vol%). This nanocomposite demonstrated remarkable stability in water through the formation of AgBr rather than BioBr, as confirmed by various spectroscopic and diffraction techniques. The optimized 1:2 wt% ratio of Cs2AgBiBr6 to g-C3N4 leads to the highest degradation rate of Rhodamine B (RhB) of 0.082 min -1 which was 14 times greater than Cs2AgBiBr6 NPLs, g-C3N4, or AgBr alone, surpassing all previously reported Cs2AgBiBr6-based nanocomposites in both efficiency and stability. Furthermore, the scavenging action of RhB led by the heterojunction photocatalyst resulted in the elimination of 98.3 % of RhB under light. The superior photocatalytic activity of the Cs2AgBiBr6 NPLs@g-C3N4@AgBr ternary composite in aqueous media was confirmed through detailed characterization, which revealed that the formation of a dual S-scheme mechanism significantly enhances interfacial charge separation and transfer, resulting in elevated photocurrent, pronounced photoluminescence quenching, and minimized charge transfer resistance. In addition, this ternary composite exhibited robust environmental stability, preserving its crystallinity and morphology after 6 months of air exposure, while maintaining consistent photocatalytic performance across 4 successive cycles in aqueous conditions. Thus, the present results introduce a novel strategy for stabilizing halide perovskites in high water content, expanding their potential for photocatalytic applications in environmental remediation and sustainable energy solutions.
无铅卤化物钙钛矿,特别是Cs2AgBiBr6,由于其优异的光吸收和可调的光响应特性,作为有前途的光催化剂而受到关注。然而,它们的实际应用受到水介质稳定性差和高水环境效率降低的阻碍,在高水环境中,Cs2AgBiBr6通过形成BiOBr进行自钝化,当含水量超过50 vol%时,其光催化活性显著降低。为了克服这些限制,我们将Cs2AgBiBr6纳米血小板(NPLs)与g-C3N4原位耦合,在水中(100 vol%)形成稳定的Cs2AgBiBr6 NPLs@g-C3N4@AgBr三元复合材料。通过各种光谱和衍射技术证实,这种纳米复合材料通过形成AgBr而不是BioBr在水中表现出显著的稳定性。优化后的Cs2AgBiBr6与g-C3N4的体积比为1:2时,罗丹明B (RhB)的降解率最高,为0.082 min -1,是Cs2AgBiBr6 NPLs、g-C3N4或AgBr单独降解率的14倍,在效率和稳定性方面超过了以往报道的所有基于Cs2AgBiBr6的纳米复合材料。此外,异质结光催化剂对RhB的清除作用可使98.3%的RhB在光照下被清除。通过详细表征,证实了Cs2AgBiBr6 NPLs@g-C3N4@AgBr三元复合材料在水介质中优异的光催化活性,发现双S-scheme机制的形成显著增强了界面电荷分离和转移,导致光电流升高,光致发光猝灭明显,电荷转移阻力最小。此外,这种三元复合材料表现出强大的环境稳定性,在空气暴露6个月后仍保持其结晶度和形态,同时在水环境中连续4次循环保持一致的光催化性能。因此,目前的研究结果介绍了一种稳定高含水量卤化物钙钛矿的新策略,扩大了它们在环境修复和可持续能源解决方案中的光催化应用潜力。
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引用次数: 0
Synergistic integration of nickel oxide and low-valent copper for enhanced electrocatalytic nitrate reduction to ammonia 氧化镍和低价铜协同整合增强电催化硝酸还原制氨
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-07-23 DOI: 10.1016/j.jiec.2025.07.049
Fengjiao Quan , Pengfei Xu , Xiufan Liu , Wenjuan Shen , Yuhao Li , Jianfen Li , Yun He , Fangyuan Chen
Nitrate (NO3) pollution in groundwater has emerged as a pressing environmental issue of global concern. The excessive application of chemical fertilizers is widely recognized as the primary contributor to this pollution Nitrate ions pose significant risks to human health and the ecological environment. Electrochemical reduction of NO3 to NH3 (NITRR) represents an effective approach for nitrogen recovery and recycling. Among many electrode materials, copper-based catalysts were considered promising due to their low cost and strong NO3 conversion capability. However, excessively strong adsorption can lead to catalyst deactivation, thereby diminishing catalytic activity. In this study, we developed an electrode material (Cu@NiO/NF) with low-valent copper (Cuδ+) through the combination of Cu and NiO, and it exhibited excellent catalytic performance in the NITRR process. At − 0.45 V vs. RHE, this catalyst achieved a Faraday efficiency of 95.7 % and an ammonia yield of 0.85 mg h−1 cm−2. Further experiments and theoretical calculations demonstrate that the presence of NiO in Cu@NiO/NF stabilizes Cuδ+, thereby enhancing the charge transfer rate and promoting the formation of hydrogen radicals (H•). This work has pioneered a new avenue for the development of efficient and innovative NTIRR materials.
地下水硝态氮(NO3−)污染已成为全球关注的紧迫环境问题。化肥的过量施用是造成这一污染的主要原因,硝酸盐离子对人类健康和生态环境造成重大威胁。电化学还原NO3−为NH3 (NITRR)是氮回收和循环利用的有效途径。在众多电极材料中,铜基催化剂因其低廉的成本和较强的NO3−转化能力而被认为是有前途的。然而,过强的吸附会导致催化剂失活,从而降低催化活性。在本研究中,我们通过Cu和NiO的结合,开发了一种低价铜(Cuδ+)电极材料(Cu@NiO/NF),该材料在NITRR过程中表现出优异的催化性能。在−0.45 V vs. RHE条件下,该催化剂的法拉第效率为95.7%,氨收率为0.85 mg h−1 cm−2。进一步的实验和理论计算表明,Cu@NiO/NF中NiO的存在可以稳定Cuδ+,从而提高电荷转移速率,促进氢自由基(H•)的形成。这项工作为开发高效和创新的NTIRR材料开辟了新的途径。
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引用次数: 0
Heterogeneous biochar-based catalytic advanced oxidation of emerging contaminants: Detailed synergy and radical generation mechanism 多相生物炭催化深度氧化新出现的污染物:详细的协同作用和自由基产生机制
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-07-19 DOI: 10.1016/j.jiec.2025.07.045
Ragavan Chandrasekar, Jyoti Prakash Ray, Pavithra Prakash, Jeevanantham Sathasivam, Jothika Jeyabalan, Selvaraju Narayanasamy
Conventional heterogeneous catalysts utilized for the advanced oxidation of emerging contaminants often suffer from limitations such as agglomeration, surface passivation, wide bandgap, and low surface area, which hinder their practical applicability. Engineered biochar presents a cost-effective alternative, offering tunable physicochemical properties like sp2-hybridized graphitic structure, structural defects, high specific surface area, and surface-bound persistent free radicals that can address the challenges faced by commonly used heterogeneous catalysts. Rational design of biochar-based catalysts requires understanding the physicochemical properties of biochar contributing to synergy between the biochar and conventional metal-based catalysts. Despite the advancements in biochar research, the synergistic role of engineered biochar-based catalysts in catalytic advanced oxidation processes (CAOPs) remains unclear. This review meticulously examines the interfacial synergy of engineered biochar with conventional catalysts used in non-energy-assisted CAOPs and energy-assisted CAOPs. A wide range of oxidant activation systems involving peroxymonosulfate, persulfate, ozone, hydrogen peroxide, peracetic acid, percarbonate, and periodate are discussed along with sonocatalysis and photocatalysis. Additionally, radical formation mechanisms are discussed in detail, highlighting how molecular and interfacial properties of biochar aid in enhanced radical generation, providing insights into the rational design of biochar-based catalysts for efficient emerging contaminant degradation.
传统的多相催化剂用于新出现的污染物的深度氧化,往往存在诸如团聚、表面钝化、宽带隙和低表面积等限制,阻碍了它们的实际应用。工程生物炭是一种具有成本效益的替代方案,具有可调的物理化学性质,如sp2杂化石墨结构、结构缺陷、高比表面积和表面结合的持久性自由基,可以解决常用的非均相催化剂面临的挑战。合理设计生物炭催化剂需要了解生物炭的物理化学性质,这有助于生物炭与传统金属基催化剂之间的协同作用。尽管生物炭的研究取得了进展,但工程生物炭基催化剂在催化高级氧化过程(CAOPs)中的协同作用仍不清楚。本综述仔细研究了工程生物炭与非能量辅助CAOPs和能量辅助CAOPs中使用的传统催化剂的界面协同作用。广泛的氧化剂活化系统,包括过氧单硫酸盐,过硫酸盐,臭氧,过氧化氢,过乙酸,过碳酸盐,高碘酸盐与声催化和光催化一起讨论。此外,还详细讨论了自由基的形成机制,重点介绍了生物炭的分子和界面特性如何促进自由基的产生,为合理设计生物炭基催化剂以有效降解新兴污染物提供了见解。
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引用次数: 0
Reconstruction of electric double layer via sodium persulfate additive for enhanced aluminium-air battery 用过硫酸钠添加剂重建增强铝-空气电池双电层
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-08-13 DOI: 10.1016/j.jiec.2025.08.027
Lei Guo , Ankang Su , Viswanathan S. Saji , Yan Tan , Peiyi Zhao , Amir Mahmoud Makin Adam
The use of aluminium (Al) in Al-air batteries (AABs) is promising owing to its lightweight characteristics, accessibility, affordability, and high safety features. However, AABs’ main challenge lies in effectively suppressing hydrogen evolution on the anode in the alkaline electrolyte. Herein, we have used sodium persulfate (Na2S2O8) as an electrolyte additive to construct a unique water barrier film, regulating the electrical double layer structure at the anode surfac to inhibit hydrogen precipitation effectively. Theoretical and experimental studies provide compelling proof for the role of Na2S2O8 in inhibiting the self-corrosion of Al by establishing a thin shielding layer, efficiently regulating the hydrogen evolution kinetics, and improving battery performance. Compared to the pristine 4 M NaOH electrolyte, anode utilization of the Na2S2O8-added electrolyte increased from 42.5 % to 75.5 %, capacity density improved from 1266.1 to 2247.8 mAh g−1, and energy density rose from 1428.2 to 2567 Wh kg−1. The significant outcome of this work could provide more insights into the development of efficient electrolytes for AABs.
铝(Al)在铝空气电池(AABs)中的应用前景广阔,因为它具有重量轻、易于使用、价格合理和高安全性的特点。然而,AABs的主要挑战在于如何有效地抑制碱性电解液中阳极上的析氢。本文采用过硫酸钠(Na2S2O8)作为电解质添加剂,构建了一种独特的水屏障膜,调节阳极表面的电双层结构,有效地抑制了氢的析出。理论和实验研究都有力地证明了Na2S2O8通过建立薄屏蔽层、有效调节析氢动力学、提高电池性能来抑制Al的自腐蚀。与原始的4 M NaOH电解质相比,添加na2s2o8的电解质阳极利用率从42.5%提高到75.5%,容量密度从1266.1 mAh g−1提高到2247.8 mAh g−1,能量密度从1428.2提高到2567 Wh kg−1。这项工作的重要成果可以为开发高效的抗体电解质提供更多的见解。
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引用次数: 0
Advancing O2/N2 separation with thin film coatings on hollow fiber membranes: A review 中空纤维膜薄膜涂层技术在O2/N2分离中的应用进展
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-08-05 DOI: 10.1016/j.jiec.2025.07.064
Oğuz Orhun Teber , Anil Kuban , Vahid Vatanpour , Ismail Koyuncu
There is an ever-increasing need for separation technologies to efficiently use oxygen and nitrogen from air, driven by advancements in industrial applications such as petrochemistry, electronics, agriculture and aviation. Membrane-based air separation is one of the fastest growing technologies due to its unique advantages in terms of compactness, cost and energy effectiveness. However, this technology, which is mature with existing polymeric hollow fiber membrane materials, has obstacles to the industrial scale application of new generation high permeance polymers. Existing gas separation membranes need to be further improved in terms of permeability and selectivity to expand the market share and compete with traditional separation technologies. This article provides a comprehensive overview of air separation regarding the elimination of existing obstacles. Then, thin film coating strategies and materials followed in the fabrication and structural development of hollow fiber membranes for air separation are discussed. Polymeric properties affecting oxygen and nitrogen in air separation are investigated. Finally, the role of composite materials in oxygen transport in thin film coatings and elimination of existing obstacles and future research directions are evaluated. Consequently, this review aims to serve as a compilation for advancing membrane technology towards more sustainable and efficient air separation solutions.
由于石油化工、电子、农业和航空等工业应用的进步,对分离技术的需求不断增加,以有效地利用空气中的氧和氮。膜基空气分离技术是发展最快的技术之一,因为它在紧凑性、成本和能源效率方面具有独特的优势。然而,该技术在现有的聚合物中空纤维膜材料上已经成熟,阻碍了新一代高渗透聚合物的工业规模应用。现有气体分离膜在渗透性和选择性方面需要进一步改进,以扩大市场份额,与传统分离技术竞争。本文提供了关于消除现有障碍的空分的全面概述。然后讨论了中空纤维空分膜的制备和结构发展中所采用的薄膜涂层策略和材料。研究了空气分离中影响氧和氮的聚合物性能。最后,对复合材料在薄膜涂层中氧输运中的作用、现有障碍的消除以及未来的研究方向进行了展望。因此,本文旨在为推动膜技术向更可持续和高效的空气分离解决方案发展提供参考。
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引用次数: 0
Highly sensitive SnO2/Co3O4 nanocomposite materials for H2S gas sensor application 用于H2S气体传感器的高灵敏度SnO2/Co3O4纳米复合材料
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-08-10 DOI: 10.1016/j.jiec.2025.08.020
Amensisa Negasa Begi , Shahid Hussain , Min Liu , Jesse Nii Okai Amu-Darko , Dyana Aziz Bayz , Mohammed Mujahid Alam , Mohamed Hussien , Rajesh Kumar Manavalan , Guanjun Qiao , Guiwu Liu
The development of practical and adaptable hydrogen sulfide (H2S) detection equipment for air quality monitoring remains challenging. Owing to their remarkable electronic band alignment and excellent features, p-n heterojunction-based sensing technology has attracted significant interest in H2S gas sensors. In this study, n-type tin oxide/p-type cobalt oxide (n-SnO2/p-Co3O4) heterojunctions were fabricated using a metal precursor solution, followed by a straightforward hydrothermal method using pure Co3O4 and molar ratios of SnO2/Co3O4 = 0.18, SnO2/Co3O4 = 0.35, and SnO2/Co3O4 = 0.55. The synthesized samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HR-TEM), Brunauer–Emmett–Teller (BET) analysis, and X-ray photoelectron spectroscopy (XPS) to evaluate their structural, morphological, and chemical properties, and surface areas. The nanocomposite sensor with a SnO2/Co3O4 molar ratio of 0.35 demonstrated a response of 791.0–100 ppm of H2S at a working temperature of 250 °C, with fast response and recovery times of 60 and 94 s, respectively. The SnO2/Co3O4 nanocomposite enhanced the gas sensor sensitivity for detecting H2S to a level as low as 1 ppm. The p-n junction, particle size, grain boundaries, active sites, and large surface area make it suitable for gas sensing.
开发实用且适应性强的硫化氢(H2S)检测设备用于空气质量监测仍然具有挑战性。基于p-n异质结的传感技术由于其显著的电子带对准和优异的特性,引起了人们对H2S气体传感器的极大兴趣。在本研究中,采用金属前驱体溶液制备n型氧化锡/p型氧化钴(n-SnO2/p-Co3O4)异质结,然后采用纯Co3O4, SnO2/Co3O4 = 0.18, SnO2/Co3O4 = 0.35, SnO2/Co3O4 = 0.55的水热法制备。利用x射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨率电子显微镜(HR-TEM)、布鲁诺尔-埃米特-泰勒(BET)分析和x射线光电子能谱(XPS)对合成的样品进行了表征,评估了它们的结构、形态、化学性质和表面积。SnO2/Co3O4摩尔比为0.35的纳米复合材料传感器在250℃的工作温度下,对H2S浓度为791.0 ~ 100 ppm,响应速度快,恢复时间分别为60 s和94 s。SnO2/Co3O4纳米复合材料将气体传感器检测H2S的灵敏度提高到低至1 ppm。p-n结、粒度、晶界、活性位点和大表面积使其适合于气体传感。
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引用次数: 0
Exfoliated LDH nanosheets for membrane-based wastewater treatment: surface engineering and performance 用于膜基废水处理的去角质LDH纳米片:表面工程和性能
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-07-28 DOI: 10.1016/j.jiec.2025.07.057
Muhammad ’Adli Nor Azman , Pei Sean Goh , Yi Lin , Ahmad Fauzi Ismail , Khairulnadzmi Jamaluddin , Norafiqah Ismail , Nur Diyana Suzaimi , Adam Haziq Mohamad Fahmi
Exfoliated layered double hydroxide (LDH) nanosheets are increasingly recognized as surface-active nanomaterials capable of enhancing membrane-based wastewater treatment. Owing to their large surface area, tunable surface charge, and strong interfacial affinity, LDH-integrated membranes exhibit improved ion permeability, selectivity, and greater resistance to fouling. This review examines nanoscale exfoliation and the characteristics of LDH surfaces on membrane interactions and performance are examined in thin-film nanocomposites (TFNs), mixed matrix membranes (MMMs) and supported LDH membranes. Exfoliation techniques—chemical, mechanical, thermal and electrochemical—are compared concerning their effects on nanosheet morphology, dispersion stability, and surface charge. Particular attention is given to radiation-assisted exfoliation, which offers a scalable, environmentally benign route for producing well-dispersed LDH suspensions. Furthermore, interfacial strategies such as polymeric coatings and layer-by-layer (LbL) assembly are discussed for their role in minimizing nanosheet aggregation and improving compatibility with polymers. The review also addresses current challenges, including nanosheet stability and the seamless integration into membrane fabrication processes. Emerging pathways that connect laboratory-scale findings with industrial implementation are discussed. From a materials engineering and sustainability perspective, exfoliated LDH nanosheets are presented as promising nanomaterials for developing next-generation membranes targeted at efficient water purification and environmental protection.
剥离层状双氢氧化物(LDH)纳米片越来越被认为是一种表面活性纳米材料,能够增强膜基废水处理。由于其大的表面积、可调节的表面电荷和强的界面亲和力,ldh集成膜表现出更好的离子渗透性、选择性和更强的抗污染能力。本文研究了纳米尺度的脱落,LDH表面对薄膜纳米复合材料(TFNs)、混合基质膜(MMMs)和负载型LDH膜的相互作用和性能的影响。比较了化学、机械、热和电化学剥离技术对纳米片形貌、分散稳定性和表面电荷的影响。特别关注的是辐射辅助去角质,这为生产分散良好的LDH悬浮液提供了一种可扩展的、环保的途径。此外,还讨论了聚合物涂层和层接层(LbL)组装等界面策略在减少纳米片聚集和改善与聚合物相容性方面的作用。本文还讨论了当前的挑战,包括纳米片的稳定性和与膜制造工艺的无缝集成。新兴的途径,连接实验室规模的发现与工业实施进行了讨论。从材料工程和可持续发展的角度来看,去角质LDH纳米片是开发下一代高效水净化和环境保护膜的有前途的纳米材料。
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引用次数: 0
A comprehensive review on two-dimensional nanomaterials-mixed matrix membranes for sustainable CO2 separation: from molecular engineering design to efficient modification strategies 二维纳米材料-混合基质膜可持续CO2分离研究综述:从分子工程设计到高效改性策略
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-07-26 DOI: 10.1016/j.jiec.2025.07.054
Mohammad Salehi Maleh , Alireza Bahrami , Mohammad Sajad Sepehri Sadeghian , Hoda Asadimanesh , Mohtada Sadrzadeh
Two-dimensional nanomaterials (2DNMs) are promising for mixed matrix membranes (MMMs) in gas separation but face challenges such as aggregation, interfacial defects, plasticization, and aging. The present review examines key obstacles and strategies to enhance 2DNM-polymer interactions, aiming for durable, high-efficiency membranes. To address such challenges, multifaceted strategies aimed at enhancing the interfacial interaction between 2DNMs and the polymer matrix are examined. Optimizing intrinsic 2DNM properties, pore size, interlayer spacing, and lateral-to-thickness ratio, can improve gas selectivity. Controlling the number of layers, enhancing solubility, and leveraging facilitated transport properties are also crucial. Surface functionalization, such as grafting ionic liquids or macromolecules, enhances compatibility while blending chain molecules fine-tunes membrane performance. Synergistic combinations of 2DNMs with other nanomaterials, including 0D, 1D, and 3D structures, significantly improve gas transport and mechanical strength. Additionally, orientation enhancement techniques, such as applying magnetic or electric fields during fabrication, align 2DNMs within the matrix to optimize gas separation pathways. The insights gained from the study of 2DNMs extend beyond CO2 separation and are applicable to other gas mixtures. Such principles play a crucial role in shaping the next generation of MMMs, with broad implications for industrial and environmental applications.
二维纳米材料(2dnm)在气体分离混合基质膜(MMMs)中具有广阔的应用前景,但面临着聚集、界面缺陷、塑化和老化等挑战。本文综述了增强2dnm -聚合物相互作用的关键障碍和策略,旨在制造耐用、高效的膜。为了应对这些挑战,研究人员研究了旨在增强2dnm与聚合物基体之间界面相互作用的多方面策略。优化2DNM的固有性质、孔径、层间间距和横向厚度比可以提高气体选择性。控制层数、提高溶解度和利用易输运性质也是至关重要的。表面功能化,如接枝离子液体或大分子,增强相容性,而混合链分子微调膜的性能。2dnm与其他纳米材料(包括0D、1D和3D结构)的协同组合,显著改善了气体输运和机械强度。此外,定向增强技术,如在制造过程中施加磁场或电场,可以在基质中对齐2dnm,以优化气体分离路径。从2dnm研究中获得的见解超越了二氧化碳分离,适用于其他气体混合物。这些原则在塑造下一代mm方面起着至关重要的作用,对工业和环境应用具有广泛影响。
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引用次数: 0
Synergistic effects of olive oil pomace extract and mineral-medicinal waters in microparticle production for pathogen inhibition 橄榄油渣提取物和矿药水在微颗粒生产中的协同抑菌作用
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-08-13 DOI: 10.1016/j.jiec.2025.08.022
N. Flórez-Fernández , I. Costa-Trigo , T. Ferreira-Anta , H. Domínguez , J.M Domínguez , A. Paz
In recent years, the development of therapeutic agents or bioactive compounds from natural products has increased due to concerns about antimicrobial-resistant bacteria. This study investigates the antimicrobial properties of olive pomace extract (OP-extract) obtained through hydrodistillation and explores its incorporation into microparticles by spray-drying technology to enhance the stability of the OP-extract. Additionally, four mineral-medicinal waters (MMW) from province of Ourense (O Baniño de Arcos, Fonte de O Tinteiro, As Burgas and Parque de O Carballiño) and Milli-Q water (as a control) were studied as ingredients to explore the use of OP-extract microparticles as a natural dermatologic product. HS GC/MS analysis of OP-extracts revealed a volatile profile with over 20 compounds, mainly aldehydes. The antimicrobial activity of the OP-extract was tested against three pathogens, showing significant inhibition at a concentration of 20 %. Several carriers were evaluated to produce the OP-extract microparticles (10 %, w/w), identifying mannitol (1 %, w/w) as a suitable carrier. The incorporation of microparticles into MMW resulted in a consistent production yield of 30 %. For the three tested pathogens, inhibition was enhanced when microparticles were produced with Baniño MMW for two of them, with values around 81 % for C. albicans, 70 % for S. aureus, while for S. epidermis the value obtained was 65 %.
近年来,由于对抗菌素耐药细菌的关注,从天然产物中开发治疗剂或生物活性化合物的工作有所增加。本研究考察了通过加氢蒸馏法获得的橄榄渣提取物(OP-extract)的抗菌性能,并探讨了通过喷雾干燥技术将其掺入微颗粒中以提高OP-extract的稳定性。此外,研究了来自Ourense省(O Baniño de Arcos, Fonte de O Tinteiro, As Burgas和Parque de O Carballiño)的四种矿物药用水(MMW)和milliq水(作为对照)作为成分,以探索op提取物微粒作为天然皮肤产品的使用。HS - GC/MS分析显示桔梗提取物挥发性成分超过20种,主要为醛类化合物。对三种病原菌的抑菌活性进行了测试,在浓度为20%时表现出明显的抑制作用。对几种载体进行了评价,以制备op -提取物微粒(10%,w/w),确定甘露醇(1%,w/w)为最佳载体。将微颗粒掺入毫米波中,产率始终保持在30%。对于三种被测病原体,Baniño毫米波微颗粒对其中两种病原体的抑制作用增强,对白色念珠菌的抑制作用约为81%,对金黄色葡萄球菌的抑制作用为70%,对表皮葡萄球菌的抑制作用为65%。
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引用次数: 0
A detailed and A minimal skeletal mechanism for the combustion of the lithium-ion battery vent gas 详细和最小骨架机制的燃烧的锂离子电池排气
IF 5.9 3区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2026-03-25 Epub Date: 2025-08-21 DOI: 10.1016/j.jiec.2025.08.037
Jiarui Liang, Xin Liu, Xianzhong Hu
Study on the combustion characteristics of lithium-ion battery vent gases are vital to prevent and mitigate lithium-ion battery thermal runaway incidents. A skeletal mechanism is developed for the combustion of lithium-ion battery vent gases, in order to increase accuracy and reduce computational time of Computational Fluid Dynamics simulation. Initially, a detailed chemical kinetic model covering C0-C2 small-molecule gases, hydrofluorocarbons, and four typical electrolytes in lithium-ion battery discharge gases was developed. The accuracy of the detailed chemical reaction mechanism is validated by the experimental data of laminar flame velocities and ignition delay time of lithium-ion battery vent gases. Subsequently, the detailed mechanism (226 species, 1656 reactions) was reduced to a minimal skeletal mechanism (66 species, 507 reactions). The minimal skeletal mechanism is validated by the ignition delay time, laminar burning velocity, key species concentrations and extinction limits of three typical lithium-ion battery vent gases in varied conditions. The findings show that the simplified skeletal mechanism effectively reproduces the outcomes of the detailed mechanism.
研究锂离子电池排气燃烧特性对预防和减轻锂离子电池热失控事故具有重要意义。为了提高计算流体动力学模拟的精度和缩短计算时间,建立了锂离子电池排气燃烧骨架机构。首先,建立了一个详细的化学动力学模型,涵盖了C0-C2小分子气体、氢氟碳化物和锂离子电池放电气体中的四种典型电解质。通过对锂离子电池排气层流火焰速度和点火延迟时间的实验数据,验证了详细化学反应机理的准确性。随后,详细的机制(226种,1656个反应)被简化为最小的骨架机制(66种,507个反应)。通过不同条件下三种典型锂离子电池排气的点火延迟时间、层流燃烧速度、关键物质浓度和熄灭极限,验证了最小骨架机制。研究结果表明,简化的骨架机制有效地再现了详细机制的结果。
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引用次数: 0
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Journal of Industrial and Engineering Chemistry
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