Chemical Engineering Journal最新文献

{"title":"Remarkable performance of flexible thermoelectric devices with inorganic chalcogenides and FC-CVD driven CNT sheets","authors":"Aarti, Vaishali Taneja, Manoj Sehrawat, Rashmi Rani, Hemant Sharma, Pankaj Kumar, Bhasker Gahtori, Bhanu Pratap Singh","doi":"10.1016/j.cej.2026.176773","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176773","url":null,"abstract":"Flexible thermoelectric (TE) materials have gained increasing attention due to their ability to harvest energy from waste heat, while exhibiting mechanical compliance with complex, non-planar geometries, thus enabling their seamless integration into wearable and portable electronic platforms. However, their practical applications remain limited due to their low TE performance, as most of the flexible TE devices are fabricated with organic TE materials, particularly polymers. Here, we demonstrate a novel strategy to bridge this gap by engineering flexible organic-inorganic hybrid TE materials fabricated using floating catalyst chemical vapour deposition (FC-CVD) derived carbon nanotube (CNT) sheets and chalcogenides based inorganic counterparts. Unlike CNT powders, these continuous CNT sheets provide long-range electrical pathways and mechanical flexibility, while tailored functionalization introduces oxygenated functional groups (–OH, –COOH) into the sheets that facilitate strong interfacial interaction with Bi<ce:inf loc=\"post\">1.8</ce:inf>Sb<ce:inf loc=\"post\">0.2</ce:inf>Te<ce:inf loc=\"post\">2.7</ce:inf>Se<ce:inf loc=\"post\">0.3</ce:inf> and AgSb<ce:inf loc=\"post\">0.94</ce:inf>Cd<ce:inf loc=\"post\">0.06</ce:inf>Te<ce:inf loc=\"post\">2.</ce:inf> This approach provides robust n-type Bi<ce:inf loc=\"post\">1.8</ce:inf>Sb<ce:inf loc=\"post\">0.2</ce:inf>Te<ce:inf loc=\"post\">2.7</ce:inf>Se<ce:inf loc=\"post\">0.3</ce:inf>-CNT and p-type AgSb<ce:inf loc=\"post\">0.94</ce:inf>Cd<ce:inf loc=\"post\">0.06</ce:inf>Te<ce:inf loc=\"post\">2</ce:inf>-CNT hybrids via a facile dip-coating method, offering a fast, scalable, and energy efficient alternative to conventional high-energy processes. This work presents a demonstration of CNT-Bi<ce:inf loc=\"post\">1.8</ce:inf>Sb<ce:inf loc=\"post\">0.2</ce:inf>Te<ce:inf loc=\"post\">2.7</ce:inf>Se<ce:inf loc=\"post\">0.3</ce:inf>/AgSb<ce:inf loc=\"post\">0.94</ce:inf>Cd<ce:inf loc=\"post\">0.06</ce:inf>Te<ce:inf loc=\"post\">2</ce:inf> hybrid nanostructures, enabled by interfacial engineering that simultaneously enhances carrier transport and phonon scattering. A flexible thermoelectric generator (TEGs) comprising 40 p-n pairs deliver a maximum attained output power of 54.4 μW and an outstanding power density of 1.0 mW cm<ce:sup loc=\"post\">−2</ce:sup> under a 70 K temperature gradient, approaching state-of-the-art performance in organic-inorganic hybrid flexible TEGs. As a proof of concept, Bi<ce:inf loc=\"post\">1.8</ce:inf>Sb<ce:inf loc=\"post\">0.2</ce:inf>Te<ce:inf loc=\"post\">2.7</ce:inf>Se<ce:inf loc=\"post\">0.3</ce:inf> and AgSb<ce:inf loc=\"post\">0.94</ce:inf>Cd<ce:inf loc=\"post\">0.06</ce:inf>Te<ce:inf loc=\"post\">2</ce:inf> were employed as model inorganic counterparts. This strategy thus provides a versatile and scalable route to next generation flexible TE devices, bridging fundamental materials design with practical energy harvesting applications and may pave the path for constructing diverse hybrid flexible TE devices.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"32 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Narrowband phosphorescent wood-based composites","authors":"Xixi Piao, Yuming Su, Ting Luo, Guoyi Wu, Wangjun Liu, Yuanyuan Chen, Zhe Mo, Yue Zhang, Kaka Zhang","doi":"10.1016/j.cej.2026.176782","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176782","url":null,"abstract":"Innovative approaches to sustainable and high-performance luminescent materials have led to the development of narrowband phosphorescent wood-based composites. By embedding narrowband phosphorescent organic molecules into a natural porous wood matrix, this study introduces a novel material with significant potential for green optoelectronic applications. Specifically, narrowband molecules were designed through low-frequency vibronic coupling to synthesize a kind of coronene derivative (CoDe), which was combined with wood to maintain its narrowband emission characteristics, with an equally impressive small full-width at half-maximum (FWHM) of 11 nm and phosphorescence lifetime of 1.46 s under ambient conditions. This composite not only inherits wood's renewability but also benefits from enhanced triplet exciton stability due to the extensive hydrogen bond network within cellulose. This work paves the way for multifunctional applications in flexible electronics, smart building materials, and advanced lighting systems.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"69 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of ultrasonic-alkaline fracturing fluid on the microstructure and wettability of coal","authors":"Maobing Lu, Shanyang Wei, Wanjia Zhou, Longwei Sun, Chunxu Yang, Xiangying Luo","doi":"10.1016/j.cej.2026.176736","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176736","url":null,"abstract":"Enhancing coalbed methane (CBM) extraction efficiency is critical for safe coal mining and clean CBM utilization. Combined ultrasound and alkaline fracturing fluid treatment improves coal matrix micropore modification, thereby increasing the effectiveness of alkaline fracturing. In this study, the improvement effect of ultrasound-alkaline fracturing fluid on coal permeability was investigated using FTIR, XRD, BET, SEM-EDS, contact angle measurements, and other methods. The results indicate that ultrasound and alkaline solution interact synergistically. Ultrasound provides physical impact, while the alkaline solution drives chemical dissolution. Together, these effects increase hydrophilic groups, reduce oxygen-containing groups, break the compact internal structure of coal, and dissolve as well as fragment certain minerals, markedly increasing internal pore abundance and widening pore pathways. An alkaline solution containing 2% NaOH demonstrates the most significant improvement in coal pore development. Additionally, ultrasound-alkali treatment enhances the hydrophilicity of the coal surface, which facilitates gas release. This study provides a theoretical foundation for the efficient extraction of coal seam gas.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"46 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pore-scale evolutionary dynamics of intermittent flow-induced residual oil remobilization for CO2-EOR and storage synergy","authors":"Xin Wang, He Tian, Longchao Liu, Shaohua Li, Pengfei Lv, Xuening Ma, Yilin Du, Wenqi Wang, Lanlan Jiang, Yongchen Song","doi":"10.1016/j.cej.2026.176728","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176728","url":null,"abstract":"Achieving global carbon neutrality necessitates the synergistic optimization of CO<ce:inf loc=\"post\">2</ce:inf>-enhanced oil recovery (CO<ce:inf loc=\"post\">2</ce:inf>-EOR) and sequestration. However, the intricate multiphase flow dynamics emerging from the interplay between complex reservoir architectures and multicomponent fluid interactions remain a critical bottleneck. This study integrates in situ X-ray computed tomography (CT) with pore-scale topological correlation analysis to quantify the dynamic evolution of gas-water-oil distributions under varied injection regimes. Our results reveal that the alternating occupancy of CO<ce:inf loc=\"post\">2</ce:inf> and brine creates a dynamic pressure field, which disrupts classical capillary equilibrium. This intermittent flow thins and ruptures oil layers at narrow pore throats. Therefore, residual oil trapped in “dead-end” pores can be effectively remobilized. We quantify this mobilization through interfacial curvature evolution, demonstrating that a reduction in mean curvature serves as a robust quantitative indicator for oil connectivity enhancement. Topologically, network-like residual oil clusters exhibit high sensitivity to local pressure fluctuations, facilitating reconnection and displacement. Furthermore, we establish a definitive pore-scale trade-off: each 1% increase in CO<ce:inf loc=\"post\">2</ce:inf> storage efficiency results in a 3.80% reduction in oil recovery. Through Pareto-based multi-objective optimization, an optimal operational window—defined by a CO<ce:inf loc=\"post\">2</ce:inf> fractional flow of 0.4 and a capillary number of 3.94 × 10<ce:sup loc=\"post\">−7</ce:sup>—is identified to maximize the synergy between energy production and carbon storage. These findings bridge the gap between microscopic interfacial phenomena and macroscopic engineering strategies, providing a mechanistic basis for sustainable geo-energy development.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"27 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leveraging different cathodic phototrophs for semi-pilot-scale photosynthetic microbial fuel cells: A comparative study on optimizing performance, cost-efficiency, and environmental impact","authors":"Swati Das, Gopa Nandikes, Santosh Kumar, Doki Manmadha Manikanta, Guido Sonnemann, Booki Min, Makarand M. Ghangrekar","doi":"10.1016/j.cej.2026.176727","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176727","url":null,"abstract":"The evident deterioration of the environment and depletion of fossil fuels are pushing the world to pay attention to energy transformations. By exploiting the photosynthetic conversion efficiency of microorganisms within bio-electrochemical systems, photosynthetic microbial fuel cells (PMFCs) emerge as a promising platform for integrated bioenergy production. However, without a successful scale-up, a promising lab-scale innovation of PMFC remains an interesting but ultimately confined scientific result with no real-world application or benefit. Addressing this, a semi-pilot-scale PMFC was developed to demonstrate integrated bioenergy production and NH<ce:inf loc=\"post\">3</ce:inf>-N removal, bridging the gap between lab-scale studies and practical application. In this regard, a novel six-chambered PMFC with a total working volume of 120 L was designed to cultivate different photosynthetic microbiota, such as algae, cyanobacteria, diatoms and others. The symbiotic mixed consortium of phototrophs synergistically improved the performance of PMFC-Mix, yielding maximum biomass productivity of 0.60 g/L.day and outstanding wastewater treatment, achieving 91% removal of total NH<ce:inf loc=\"post\">3</ce:inf>-N. Furthermore, fatty acid methyl ester analysis confirmed the potential of the extracted lipids, specifically C16–C18 chains, which meet biodiesel standards (ASTM <ce:inter-ref xlink:href=\"astm:D6751\" xlink:type=\"simple\">D6751</ce:inter-ref>/EN 14214). Concurrently, life-cycle analysis revealed that PMFC-Mix consistently outperformed monoculture systems across midpoint and endpoint indicators. The mixed phototrophic configuration achieved up to 23% lower global warming potential and 25–30% reduced human toxicity impacts under both biomass yield and energy output functional units. This affirms the environmental sustainability and scalability of this integrated PMFC technology, positioning it as a highly efficient platform for simultaneous energy recovery, wastewater remediation, and biofuel precursor production.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"23 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ constructed Ag/CNT hierarchical networks in TPU nanofibers for dual-mode triboelectric sensing","authors":"Shiqiang Ouyang, Feijie Wang, Yichi Liu, Suyang Wang, Yaoli Wang, Yuefan Liu, Zhixuan Mei, Kaixin Liao, Shenzhuo Zhang, Yueming Hu, Shufeng Ma, Liqiang Wang","doi":"10.1016/j.cej.2026.176694","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176694","url":null,"abstract":"With the rapid advancement of the Internet of Things (IoT) and human-machine interaction (HMI), developing dual-mode self-powered sensors that combine high sensitivity with long-term stability is critical. Herein, we propose a high-performance dual-mode triboelectric nanogenerator (TENG). It is based on an electrospun thermoplastic polyurethane (TPU) fibrous membrane, which is reinforced by an in-situ constructed Ag/CNT hierarchical conductive network. By in-situ anchoring Ag nanoparticles onto the surface of carbon nanotubes (CNT), we not only established an efficient electron transfer network but also regulated the material's surface potential through in-situ doping. This electrical modification works synergistically with the micro/nano rough structure created by electrospinning. As a result, the TENG achieves a high open-circuit voltage of 189 V and a charge density of 171.36 μC/m<ce:sup loc=\"post\">2</ce:sup> in contact-separation mode. Furthermore, owing to enhanced interfacial polarization and charge retention, the device demonstrates excellent non-contact distance sensing (0.5–2.5 mm), following a single-exponential decay model. Practical applications are demonstrated in three areas: HMI control in contact mode; high-precision electronic weighing (error ~ 2.11%) in non-contact mode; and real-time recognition of robotic arm grasping states for soft objects using a 1D-ResNet deep learning algorithm. This work offers a novel solution for dual-mode self-powered sensing and provides an effective material strategy and device paradigm for constructing self-powered, multimodal AI-assisted intelligent perception systems.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"69 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid polypropylene recovery using ionic liquid: Achieving 99% recycling efficiency with mechanistic insight from neutron scattering","authors":"Heider Salazar, Conor P. Davids, Ioan-Alexandru Baragau, Zhen Lu, James Bowen, Kiem Giap Nguyen, Ian P. Silverwood, Suela Kellici","doi":"10.1016/j.cej.2026.176779","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176779","url":null,"abstract":"Efficient recycling of polypropylene (PP) from complex waste streams remains a major challenge, particularly for multilayer non-woven materials. Here we report a rapid dissolution–reprecipitation process for polypropylene recovery using an ionic liquid formed from tris(2-ethylhexyl) amine and 3,3-dimethylbutyric acid. The process operates at 160 °C under ambient pressure, achieving up to 99% polymer recovery, with complete dissolution occurring in less than one minute. An integrated hot-filtration step simultaneously removes pigments and additives, eliminating the need for additional purification stages. The recovered polymer exhibits thermal, structural, and mechanical properties within the same order of magnitude as virgin polypropylene, confirming preservation of polymer integrity. Quasi-elastic neutron scattering (QENS) measurements provide molecular-level insight into the dissolution mechanism, demonstrating enhanced polymer mobility and plasticisation induced by the ionic liquid. Complementary spectroscopic and chromatographic analyses confirm the chemical stability of the solvent across the investigated temperature range, indicating its potential suitability for reuse. These findings establish a mechanistically informed solvent-based strategy for polypropylene recycling, offering a scalable pathway for recovering polyolefins from complex waste streams.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"27 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Narrowing the green emission of CsPbBr3 quantum dot glass via high fluorine doping strategy toward backlit displays","authors":"Xinhao Cai, Shaojun Wang, Anjun Huang, Yingzhu Zi, Yan Mu, Yuhuan Li, Yue Liu, Yangke Cun, Farhod Shokir, Zhiguo Song, Jianbei Qiu, Daqin Chen, Zhengwen Yang","doi":"10.1016/j.cej.2026.176766","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176766","url":null,"abstract":"Narrow-band emission is essential for wide-color-gamut display applications; however, the emission bandwidth of perovskite quantum dots typically broadens upon embedding into glass matrices. Herein, we report a high‑fluorine-doping strategy to regulate crystallization behavior and optical performance of CsPbBr<ce:inf loc=\"post\">3</ce:inf>-containing quantum dot glass toward high-performance backlit displays. High-concentration AlF<ce:inf loc=\"post\">3</ce:inf> incorporation into borosilicate glass enables fluorine to modulate the glass network and passivate halide vacancies, thereby regulating CsPbBr<ce:inf loc=\"post\">3</ce:inf> nanocrystal precipitation and suppressing defect-related trap states. As a result, the emission linewidth is narrowed from 24 to 19 nm, which is narrower than that of most reported CsPbBr<ce:inf loc=\"post\">3</ce:inf>-containing glass systems. In addition, fluorine incorporation induces partial glass network depolymerization, promotes decrease in PQD size distribution, resulting in the observed spectral narrowing and redshift. The CsPbBr<ce:inf loc=\"post\">3</ce:inf>-containing PQD glass exhibits good ultraviolet irradiation resistance, thermal reversibility up to 493 K, and strong exciton binding, demonstrating exceptional optical robustness. By modulating halide composition, full-visible-spectrum tunability from blue to green and red is achieved. This work provides a strategy for constructing spectrally pure and robust perovskite quantum dot glass, opening new opportunities for wide-color-gamut display applications.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"26 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soot as a promoter in three-way catalytic reactions: Adsorption competition and spillover pathways on Pd/CeO2","authors":"Jianxiao Li, Zejun Liu, Yibo Wang, Gongde Wu, Gongjin Yang, Xiaodong Wu, Jie Wan, Shuang Liu","doi":"10.1016/j.cej.2026.176761","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176761","url":null,"abstract":"With the introduction of gasoline direct injection engines, soot has become an additional concern for three-way catalytic (TWC) systems due to its potential to block active sites. This study challenges this conventional view by demonstrating that soot can actually promote TWC reactions over a Pd/CeO<ce:inf loc=\"post\">2</ce:inf> catalyst—even before its own ignition. Using a well-defined model system comprising uniform Pd colloids supported on nanocube-shaped CeO<ce:inf loc=\"post\">2</ce:inf>, we show that adding 10 wt% soot significantly lowered the light-off temperatures of CO, C<ce:inf loc=\"post\">3</ce:inf>H<ce:inf loc=\"post\">6</ce:inf>, and NO under stoichiometric “dry” TWC conditions, with the most pronounced enhancement occurring below 300 °C. Kinetic analysis combined with temperature-programmed desorption/reduction, in situ DRIFTS, and X-ray photoelectron spectroscopy, revealed a clear hierarchy of adsorption strength on palladium active sites: C<ce:inf loc=\"post\">3</ce:inf>H<ce:inf loc=\"post\">6</ce:inf> ≫ NO ≥ CO &gt; O<ce:inf loc=\"post\">2</ce:inf>. Soot functioned as an adsorptive reservoir, capturing strongly-adsorbed C<ce:inf loc=\"post\">3</ce:inf>H<ce:inf loc=\"post\">6</ce:inf> via a secondary spillover process across the CeO<ce:inf loc=\"post\">2</ce:inf> support. This alleviated excessive adsorption on the active site, creating opportunities for the activation of other reactants over PdO-Pd nanoparticles, and thereby improved the overall TWC performance. A two-dimensional radial diffusion model further confirmed the feasibility of this spillover pathway within the relevant reaction timescale. The findings provide new mechanistic insight into soot-catalyst interactions and offer important implications for the design of four-way catalytic converters where filtration and catalytic functions are integrated.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"152 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosting microwave absorption and thermal conductivity of Co(OH)2@Co9S8 nanotubes via heterointerface and defect engineering","authors":"Kang Fu, Pinzhang Zhao, Engao Lou, Xianhao Wu, Xiaoye Xu, Lingling Xu, Liyan Xie, Guoxiu Tong, Tong Wu","doi":"10.1016/j.cej.2026.176759","DOIUrl":"https://doi.org/10.1016/j.cej.2026.176759","url":null,"abstract":"The accelerated development of electronic devices toward miniaturization, high integration, and high frequency has driven the need for advanced integrated materials with both microwave absorption and thermal conduction capabilities. In this work, Co(OH)<ce:inf loc=\"post\">2</ce:inf>@Co<ce:inf loc=\"post\">9</ce:inf>S<ce:inf loc=\"post\">8</ce:inf> nanotubes (NTs) were synthesized as an advanced multifunctional material with wide-band absorption and high thermal conductivity, using a two-step hydrothermal method based on the Kirkendall effect. For the enhancement of electromagnetic wave absorption performance (EMWAP) and thermal conductivity (TC), their morphology, heterointerfaces, and defects were synergistically optimized by precisely controlling the precursor preparation temperature (<ce:italic>T</ce:italic><ce:inf loc=\"post\"><ce:italic>p</ce:italic></ce:inf>), the amount of sulfiding agent (<ce:italic>m</ce:italic>), and the sulfidation temperature (<ce:italic>T</ce:italic><ce:inf loc=\"post\"><ce:italic>s</ce:italic></ce:inf>). The NT structure provided a continuous thermal transfer pathway that enhanced TC via effective tube-to-tube contact. In addition, the combination of Co(OH)<ce:inf loc=\"post\">2</ce:inf> with Co<ce:inf loc=\"post\">9</ce:inf>S<ce:inf loc=\"post\">8</ce:inf> significantly improved microwave-absorbing and Radar-stealth performance. An ABW/d of up to 3.33 GHz/mm and a wide-band RCS reduction of 23.8 dB·m<ce:sup loc=\"post\">2</ce:sup> were achieved at a low load of 20 wt%, exceeding those of the precursor and other already-reported absorbers. A TC improvement of up to 1627% in the Co(OH)<ce:inf loc=\"post\">2</ce:inf>@Co<ce:inf loc=\"post\">9</ce:inf>S<ce:inf loc=\"post\">8</ce:inf> NTs resulted from their effective 3D thermal transfer network, improved phonon matching, and phonon-electron co-transmission. The outstanding performance of the Co(OH)<ce:inf loc=\"post\">2</ce:inf>@Co<ce:inf loc=\"post\">9</ce:inf>S<ce:inf loc=\"post\">8</ce:inf> NTs, besides, could be ascribed to their strong polarization loss, effective EMW scattering, and efficient electron-phonon cooperative transport pathways, as revealed by theoretical analyses based on DFT calculations, CST simulations, and COMSOL models. In sum, this research provides valuable insights into the application of transition-metal sulfides in electromagnetic protection and thermal management.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"28 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147752795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}