Cell Reports Physical Science
·
2025
·
IF 7.3
Keke Shao,Xuan Zhang,Mengjie Song,Jun Shen,Lizhen Huang,Tianzhuo Zhan,Haidong Wang,Bo You,Libor Pekař,Dong Rip Kim,Christopher Yu Hang Chao,Long Zhang
Message storage using documents and telecommunications encounters high energy consumption and a short life cycle in cold regions. Easily available low temperature and water have created the history-recording glaciers. Inspired by the naturally occurring bubbles in glaciers, we elucidate the underlying physics governing them and develop an ice-based message storage method. The formation process of trapped air bubbles is controlled by the heat and mass transfer during freezing. We identify four ice regions based on the bubbles’ distribution and determine the critical freezing rate between the bubble and clear ice regions at 2.87 μm/s. Manipulating the bubble layer by varying the freezing rate successfully utilizes Morse, binary, and ternary codes to store messages. These findings reveal the underlying physics of the trapped air bubble formations, and the intermittent growth of bubble layers also provides the potential for incorporating artificial intelligence into material solidification, glacier analysis, and gas exploration.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mingxing Jing,Yiyang Fu,Yu Yang,Hongyuan Zhu,Wensheng Wang,Han Wu,Zhuangzhi Sun
Currently, low counter-ion adsorption due to low surface charge density of solids and slow ion flow due to lack of gradient structure are still the key factors restricting the performance of moisture energy harvesters (MEHs). In this study, an efficient MEH based on wood aerogel is developed through electronegativity enhancement and dual-gradient asymmetric structure design. The negative potential of the internal channel is successfully enhanced by introducing ionization groups, resulting in an electric double layer (EDL) with higher counterion concentration. Meanwhile, the rapid movement of ions is further induced by the dual-gradient of water and ion concentration triggered by the surface porous structure and the asymmetry of the overall ionization groups. At 80 % relative humidity, the device achieved a peak open-circuit voltage of 650 mV and a short-circuit current of 22 μA, approximately 9.1 times the average current of most biomass-based MEHs. In addition, we also designed a forest fire early warning system that is sensitive and can accurately assess the scale of the fire. These groundbreaking findings not only provide innovative ways to develop simple and effective environmental energy harvesting strategies, but also have the potential to expand its application range.
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LANGMUIR
·
2025
·
IF 3.9
Yuchuan Qian,Tianhong Xu,Haiyuan Yao,Guangchun Song,Yuxing Li,Wuchang Wang,Xinran Yu,Zheng Xu
Flow blockage caused by hydrate deposition in deep-water–oil and gas pipelines seriously affects the safety of energy transmission. The structural stability of hydrates has a direct influence on the assessment of the development of hydrate deposition in pipelines, and the situation under hydrate-inhibitor-containing conditions may be more complicated. The effect of inhibitors on the structural stability of hydrate deposition under the action of flow scouring has not yet been clarified. The present study was based on the process of hydrate formation transformation under kinetic inhibitor-containing pectin conditions. The “concentration effect” of the pectin system causes the hydrate particle morphology to change from acicular to punctate. For the first time, the evolution model of microscopic fracture in the hydrate bed under the action of flow scouring in the high-mass transfer region was clarified. It was determined by microscopic dynamic data that there was reformation and filling of hydrate particles between the flow scouring fracture as well as growth and extension behavior, and a chain initiation-induced nucleation effect of hydrate particles was proposed. It was further found that pectin weakened the cohesion of hydrate particles, but when the pectin concentration was 0.25 wt %, there was an abnormal increase in cohesion. Enhanced mass transfer due to structural destabilization of the hydrate layer may be responsible for the continued formation and transformation of pectin system hydrates at low shear rates. This study shows for the first time the correlation between inhibitor concentration and hydrate conversion from the perspective of structural stability of hydrate beds and provides a theoretical basis for the engineering application of green inhibitors.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Wenjun Li,Lemonia Antoniadi,Zhiwen Qi,Hongxia Chen,Leandros A. Skaltsounis,Hao Zhou,Chengzhang Wang
This study identified extra virgin olive oil rich in oleocanthal from six Chinese cultivars and enhanced its stability through microencapsulation. Ascolana Tenera oil, containing 100 mg/kg of oleocanthal, was selected. Microencapsulation via complex coacervation with gelatin and gum arabic, followed by spray drying, yielded spherical microcapsules (788.4 nm) with 70.75 % encapsulation efficiency. Characterization by Fourier Transform Infrared Spectroscopy, X-ray Diffraction, and Scanning Electron Microscopy confirmed structural stability and effective cross-linking. In vitro release studies across 5 food models showed rapid oleocanthal release (50.55 % in 120 min) in simulated gastric fluid, fitting the Korsmeyer–Peppas model with Fickian diffusion. In intestinal fluid, release reached ~70 %, following the Peppas–Sahlin model. Compared to unencapsulated oil, microcapsules exhibited approximately double antioxidant activity, due to improved oxidative stability and storage resistance. These findings suggest that microencapsulation preserves oleocanthal bioactivity and enables controlled release, making this approach promising for functional food applications.
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PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Jiaxin Li,Zhenyu Zhang,Hongxiu Zhou,Feng Zhao,Xiuqing Liu,Wei Wen
Epoxy resins are widely used in the coating, adhesive and electronics industries. However, it is a difficult-to-machine polymer owing to its nature of thermal softening and soft-plastic and corrosion resistance characteristics. To overcome these difficulties, surface roughness (Sa) is usually set at more than 4 nm, and material removal rate (MRR) is normally set lower than 2 μm h−1 during traditional chemical mechanical polishing (CMP). Nevertheless, atomic level surface roughness is desired by high-performance devices of epoxy resins. This poses a challenge in conventional CMP. To address this challenge, herein, a novel CMP was developed, and the CMP slurry included ceria, dichloromethane, sodium carboxymethyl cellulose and deionized water. After CMP, an atomic level surface roughness was achieved with an Sa of 0.198 nm, and the MRR was 5.46 μm h−1. To the best of our knowledge, both the surface roughness and MRR are the best values reported in the literature. An atom-molecular dual-scale model was proposed to investigate the dynamically interactive mechanism between dichloromethane and the epoxy resin. Fourier transform infrared and Raman spectroscopies revealed that the conformation of epoxy resin varied and surface swelling occurred during the diffusion of dichloromethane. Hydrogen atoms of dichloromethane were selectively adsorbed onto the oxygen atoms of ether bonds in the epoxy resin, reducing the energy of the chains. The adsorption energy was high, reaching up to −67.3 kcal mol−1, and this conformation was the most stable. During adsorption, 0.012 eV of energy was transferred to dichloromethane from the small crosslinked molecules. Molecular dynamics simulations and density functional theory were used to perform these calculations. Dichloromethane relaxed the resin surface, speeding up the migration rate of chains and reducing their energy of breaking. The combined effect of mechanical shear force, compressive force and relaxation of swelling led to the breakage of C–N bonds with the lowest energy in the chains. The broken short chains were wrapped in dichloromethane, separating from the surface of the resin with the slurry flow. Our results provide new insights into acquiring an atomic level epoxy resin surface with soft-plastic, thermal softening and corrosion resistance characteristics.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Lingwu Meng,Maosheng Lin,Qirui Guo,Longzhao Zhang,Xiangyu Huang,Chenrao Hu,Shule Zhang,Weihua Ma
A novel Cu@SZN-2Si catalyst with both microporous and mesoporous structures was successfully fabricated using a new template agent (BCph-10-6-6). This catalyst showed outstanding catalytic performance in the selective catalytic oxidation (SCO) of triethylamine (TEA). Notably, in contrast to the conventional mesoporous Cu@SZ-2Si_CTAB synthesised with CTAB, Cu@SZN-2Si presented a flower-like nanosheet morphology. It boasted a higher density of Lewis acid sites and more surface-adsorbed oxygen (O ads ). Under the reaction conditions at 280 °C, the TEA conversion reached 100 %, and the N 2 yield was as high as 99.2 %. Moreover, in the presence of 10.0 vol% H 2 O vapour, the catalytic activity of Cu@SZN-2Si remained above 87.3 % at 280 °C and maintained stable operation for 130 h at 400 °C. Structural analysis coupled with DFT calculations revealed that Si incorporation enabled the crystallization of tetragonal ZrO 2 in the presence of SO 4 2− ions, while forming an amorphous SiO 2 that encapsulated the ZrO 2 surface. This structural characteristic significantly increased the number of isolated Cu 2+ species and acidic sites on the catalyst surface. The strong interaction between these isolated Cu 2+ species and acidic sites was crucial for promoting the adsorption and activation of TEA. In addition, in-situ DRIFTs results indicated that TEA first adsorbed on the Cu@SZN-2Si surface, followed by a thermal decomposition process. The cleavage of the C-N bond in TEA generated NH* intermediates, which were essential for N 2 generation and promoted the SCO of TEA.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Guodong Han,Fangyuan Qi,Song Zhao,Yuxiang Jia,Junxiang Zhou,Yudeng Wang,Sai Sui,Bo Feng,Jun Wang,Jiafu Wang,Shaobo Qu
The microstructure design of new carbon nanomaterials always achieves unimaginable characteristics and performance. In this work, the influence of surface roughness ( Ra ) of porous carbon derived from Metal-Organic-Frameworks (MOFs) with different shapes on impedance matching and effective absorption bandwidth (EAB) has been given special attention. The rod shaped, spherical and sheet-like porous carbon materials are obtained at 700 °C from Ni-BTC, Ni-DOBDC and Ni-BPDC. The Ni-DOBDC-700 spherical porous carbon with a relatively large Ra (290 nm) exhibits excellent absorption performance. The minmium reflection loss ( RL min ) is -20.8 dB at 14 GHz and the EAB can reach at 6.7 GHz (11.1-17.8 GHz) when the thickness is 2.2 mm, which covers the Ku band. The spherical porous carbon, the Ni alloys and NiO particles serves the conduction channel, the sources of magnetic loss and interface polarization, respectively. The radar cross section (RCS) value of Ni-DOBDC-700 is less than -10 dB m 2 within the range of -60° to 60° and the maximum scattering intensity is only -16.5 dB m 2 at the thickness of 2 mm. The results provide a new design strategy for fabricating high performance MAMs with different morophology of MOFs derived carbon materials.
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Thermal Science and Engineering Progress
·
2025
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IF 5.4
Lin Liu,Xin Liu,Qunzhi Zhu,Jiatian He
The global energy transition is urgent, and photovoltaic (PV) power generation, as an important method of utilizing solar energy, is playing an increasingly crucial role in the global energy transformation. However, the excessively high operating temperature of PV panels remains a pressing issue. High temperatures lead to an increase in the internal resistance of PV cells, thereby reducing their energy conversion efficiency and power generation performance. In this study, a highly efficient cooling PV module with moisture-absorbing properties was fabricated using a crosslinking-vacuum freeze-drying method, with agarose modification. The moisture-absorbing hydrogel absorbs and stores moisture from the atmosphere at night, and during the day, the excess heat from the PV panel is used to evaporate the moisture, providing cooling. Laboratory and outdoor experiments were conducted to validate this approach. At a solar irradiance of 1 kW/m 2 , the cooling effect of the PV panel can achieve a temperature reduction of approximately 9 ℃, with a 2.7 % increase in maximum power output compared to a standalone PV panel. Its low cost, significant cooling effect, and good outdoor applicability indicate that this hydrogel film-based cooling solution holds potential for practical applications.
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PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2025
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IF 1.8
Pengcheng Li,Zhixu Liu,Yaxuan Liu,Xin Wen,Zijian Li,Wei Zhou,Shouyu Wang,Weifang Liu
With excellent optoelectronic behavior, organic-inorganic hybrid perovskites have become leading contenders in the development of future photovoltaic and optoelectronic devices. Herein, two new lead-free, quasi-0D OIHPs, (C 6 H 16 N) 2 ZnI 4 and (C 6 H 16 N) 2 CdI 4 , are synthesized, and both crystallize in the monoclinic system (P2 1 /n space group) as confirmed via single-crystal X-ray diffraction analysis. Optical bandgaps are measured to be 4.595 eV for (C 6 H 16 N) 2 ZnI 4 and 4.255 eV for (C 6 H 16 N) 2 CdI 4 , which align well with those from first-principles calculations. Photoluminescence studies on (C 6 H 16 N) 2 ZnI 4 and (C 6 H 16 N) 2 CdI 4 show peaks at 393 and 382 nm, respectively, which are attributed to self-trapped exciton (STE) transitions induced by lattice distortion. Notably, (C 6 H 16 N) 2 CdI 4 exhibits unusual blue emission (quantum yield: 1.41%, lifetimes: 168.5 ps), while (C 6 H 16 N) 2 ZnI 4 shows blue luminescence with enhanced efficiencies (quantum yields: 19.64%, lifetimes: 473.7 ps). These findings broaden the application prospects of 0D OIHP materials in renewable energy and photonics.
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Energies
·
2024
·Vol. 17
·期 2
·474
·
IF 3
Xiao Yang,Yuqi Ji,Haoyan Zhang,Bin Liu
Tetrabutylammonium bromide (TBAB) is considered a promising alternative cold energy storage material. Due to the high dissociation heat of phase transition at an atmospheric pressure of 278–293 K, which reaches 200–500 kJ/kg, this substance is considered an effective cold energy storage medium for air conditioning systems. In this paper, the cold storage crystallization process of TBAB solution with different concentrations was tested by conducting experiments and the phase transition’s temperature and latent heat were measured. Finally, the growth characteristics of TBAB hydrate crystals with different concentrations (10%, 20%, 30% and 40%) were analyzed. Considering the cold storage temperature, phase transformation temperature and latent heat, the cold storage effect is the best when 40% TBAB solution is used. Although single substance phase change materials have a long service life, they have problems with low thermal conductivity and high undercooling. Therefore, researchers usually improve the performance of phase change materials by adding other auxiliary materials, thereby enhancing their application prospects. Among these auxiliary materials, adding nano additives to phase change materials can significantly improve latent heat, thermal conductivity and nucleation ability, while also reducing undercooling. Therefore, we studied the influence of different nano-additives (Al2O3, SiC, TiO2and ZnO) on phase change materials. The composites with excellent properties were screened by cooling step cooling curve and differential scanning calorimeter (DSC). Compared with pure TBAB solution, the phase transition latent heat of the composite phase change materials (PCMs) prepared by adding nanoparticles were significantly increased. The results show that adding nano-SiC into 40% TBAB solution can obtain better performance. This work not only provides reference for the further research, but also a sight to design the phase change materials for the application of new phase change cold storage materials.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Fangshan Li,Kaixiong Zhao,Yuchao Ke,Chun Yang,Bibo Wang,Fukai Chu,Weizhao Hu,Lei Song,Yuan Hu
Ethylene propylene diene monomer (EPDM) is widely used in automotive and HVAC sealing systems, where its long-term thermal-oxidative stability and fire safety are critical, yet challenged by high-temperature operation and flammability risks. To address these limitations, this work develops a surface-engineered boron nitride synergist (h-BN@PDT) through NaOH-assisted hydroxylation and subsequent functionalization with hexachlorocyclotriphosphazene and tannic acid. The modified h-BN@PDT integrates phosphorus/nitrogen flame-retardant groups and radical-scavenging phenolic hydroxyls, achieving multifunctional enhancements in EPDM composites. Thermal-oxidative aging tests (125 °C, 168 h) demonstrated exceptional stability, with 11.12 MPa of tensile strength for aged h-BN@PDT/EPDM, compared to 2.78 MPa of traditional flame-retardant EPDM without BN fillers. Doubling oxidation induction time was attributed to enhanced thermal conductivity and pyrolysis activation energy, which contributed to BN’s oriented heat-transfer pathways and phenolic hydroxyl-mediated radical quenching. Flame retardancy evaluations revealed that h-BN@PDT can effectively replace partial conventional flame retardants while enabling the composite to achieve a UL-94 V-0 rating with only 25 phr of flame-retardant loading. Cone calorimetry tests demonstrated a significantly reduced heat and smoke release rate. Mechanistic studies identified that h-BN@PDT enhances flame retardancy through the synergistic effects of the lamellar barrier effect and promoted catalytic charring capability. These mechanisms effectively inhibit heat transfer, block the diffusion of pyrolysis products, and restrict oxygen access, thereby substantially improving the flame-retardant efficiency of conventional systems. This work resolves the inherent trade-offs among flame retardancy, aging resistance, and mechanical integrity in EPDM, offering a scalable strategy for next-generation sealing materials in electric vehicles and high-temperature engineering applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huan Chen,Yunhao Zhang,Wang Cheng,Shengxue Gong,Jia hui Hu,Yanhong Feng
The complete utilization of lignocellulosic biomass requires efficient and sustainable pretreatment methods, such as organic solvent pretreatment, which produces high-quality lignin and highly digestible carbohydrates. However, conventional organic solvent pretreatment faces challenges, including complex process flow, high solvent consumption, and reliance on strong acid-base catalysts. To address these limitations, this study developed a novel supercritical carbon dioxide (SCCO₂)-assisted solvent vapor pretreatment method. SCCO₂-assisted ethanol/water solvent vapor disrupted the biomass structure and dissolved specific components, while intermittent cooling induced solvent vapor-liquid phase transition for component separation and enrichment. Results demonstrated 92.26 % cellulose retention and 89.01 % lignin removal with good structural homogeneity of the separated lignin under solvents with only 25 % ethanol loading. The vapor-phase pretreatment design enabled solvent reuse, and biomass treated with twice-reused solvents still exhibited excellent component separation. Solvent consumption was significantly reduced, lowering the total solvent-to-biomass ratio of the pretreatment to 3.3: 1. Life cycle assessment (LCA) results indicated that reducing organic solvent usage could significantly minimize environmental impacts. This technique provides an environmentally efficient strategy for pretreating lignocellulosic biomass.
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危险品化学品经营许可证（带存储）