Journal of Materials Chemistry A
·
2024
·
IF 10.7
Miao Wang,Yijin He,Xiaoyu Yang,Xuhui Hou,Wenxuan Li,Shaobo Tan,Zhicheng Zhang
With the increasing demand for dielectric materials in high-frequency microwave applications, fluoropolymer-based dielectric materials have been widely utilized due to their excellent dielectric and insulation properties. However, the low thermal conductivity limits their ability to meet the thermal dissipation requirements during high-frequency and high-speed signal transmission. The present study introduces a pioneering interface engineering strategy wherein C–F bonds on the surface of ethylene-tetrafluoroethylene copolymer (ETFE) are photo-catalytically activated, enabling successful grafting of poly(glycidyl methacrylate) (PGMA) chain segments. Subsequently, the resulting graft copolymers are blended with thermally conductive h-BN filler to prepare composite dielectric materials. The results demonstrate that the incorporation of PGMA segments significantly enhances the interfacial compatibility between the ETFE matrix and h-BN filler, resulting in composites with a dense microstructure and outstanding dielectric and thermal properties. At a filler content of 30 vol%, the ETFE-g-PGMA@BN composite achieves an in-plane thermal conductivity of 4.2 W (m K)−1 and a through-plane thermal conductivity of 0.77 W (m K)−1. Moreover, at 1 GHz, the composite exhibits a dielectric constant of 2.2 and a dielectric loss of 0.004. This work presents a novel interface design strategy for surface modification of PTFE-based fluoropolymers, expanding their potential applications in printed circuit boards (PCBs) and providing a new direction for the design of polymer-based dielectric materials.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuzhuang Sun,Bocheng Yu,Yu Liu,Bin Lu,Yanmei Shen,Yanmin Zhang,Hongman Sun,Hui Zhou,Hengshan Qiu
Integrated carbon capture and utilization via dry reforming of methane (ICCU-DRM) paves a sustainable way for directly converting CO 2 from flue gas into CO. However, the process suffers from severe carbon depositions and low CH 4 utilization. Herein, we demonstrate that the NiMnxCa dual functional materials undergo a spontaneous structural self-optimization during cyclic ICCU-DRM process. The MnO x can segregate from (MnO) α (CaO) 1-α solid solution during CO 2 capture. Consequently, the Ni-MnO x interaction, with a MnO x -coated Ni surface, can be intensified with the material reconstruction, which effectively suppresses the hydrogen recombination probability and prevent carbon deposition. Moreover, the *H from CH 4 activation can react with MnO, enabling highly efficient conversion of CO 2 via in situ chemical looping pathway. As an example, the NiMn5Ca achieved a ~ 100 % H utilization (~ 0 H 2 production), 95 % CO 2 conversion and < 1 carbon deposition/per mol of converted CO 2 at 675 °C in 25 cycles. The work illustrates a typical scenario of an intelligent structure optimization under reaction environment and proposes a strategy to enhance CH 4 utilization efficiency by directing *H to a fast surface reaction rather than desorbing as H 2 .
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ANALYST
·
2015
·Vol. 140
·期 13
·4566-4575
·
IF 4.107
Jacky F. C. Loo,S. S. Wang,F. Peng,J. A. He,L. He,Y. C. Guo,D. Y. Gu,H. C. Kwok,S. Y. Wu,H. P. Ho,W. D. Xie,Y. H. Shao,S. K. Kong
As in all RNA viruses, influenza viruses change and mutate constantly because their RNA polymerase has no proofreading ability. This poses a serious threat to public health nowadays. In addition, traditional pathogen-based detection methods may not be able to report an infection from an unknown type or a subtype of virus if its nucleotide sequence is not known. Because of these factors, targeting host microRNA signatures may be an alternative to classify infections and distinguish types of pathogens as microRNAs are produced in humans shortly after infection. Although this approach is in its infant stage, there is an urgent need to develop a rapid reporter assay for microRNA for disease control and prevention. As a proof of concept, we report herein for the first time a non-PCR MARS (MicroRNA-RNase-SPR) assay to detect the microRNA miR-29a-3p from human subjects infected with influenza virus H1N1 by surface plasmon resonance (SPR). In our MARS assay, RNase H is employed to specifically hydrolyze the RNA probes immobilized on the gold surface where they hybridize with its cognate target cDNAs miR-29a-3p, where it was formed from reverse transcription with mature miR-29a-3p specific stem-looped primers. After the digestion of the RNA probe by RNase H, the intact cDNA was released from the RNA–DNA hybrid and bound to a new RNA probe for another enzymatic reaction cycle to amplify signals. With assay optimization, the detection limit of our MARS assay for miR-29a-3p was found to be 1 nM, and this new assay could be completed within 1 hour without thermal cycling. This non-PCR assay with high selectivity for mature microRNA provides a new platform for rapid disease diagnosis, quarantine and disease control.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Cong Wan,Jianwen Zhang,Honglei Zhang,Min Liu,Yiming Li,Zijun Yan,Chengheng Pang,Tao Wu
The catalytic reduction of CO₂ into valuable chemicals and fuels is a promising strategy for mitigating global carbon emissions. This study explores the synergistic co-reduction of CO₂ and H₂O using nanoscale zero-valent iron (NZVI) as a dual-function catalyst. Under light irradiation at 300 °C, the CO₂ reduction rate increased by more than 10-fold compared to dark conditions, demonstrating significant photothermal synergy. The study reveals that NZVI undergoes a phase transformation, where Fe₃O₄ functions as a photocatalyst while Fe 0 serves as an electron donor, enabling a unique dual-functionality that facilitates efficient electron transfer. The addition of 10 vol% H₂ stabilizes the reaction, leading to a higher and more consistent CO yield. When investigating the simultaneous reduction of CO₂ and H₂O, we discovered competitive adsorption and reaction pathways that significantly influence product distribution. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations revealed three distinct mechanistic pathways for CO₂ conversion: direct C O bond cleavage, a carboxylate-mediated pathway and bicarbonate-mediated pathway, with the carboxylate and bicarbonate pathways being uniquely promoted by H and OH from H₂O dissociation. The addition of H₂O into the CO₂ and H₂ reaction significantly enhanced CH₄ generation due to the extra H source from H₂O dissociation. These findings offer valuable insights into the competitive mechanistic pathways of CO₂-H₂O co-reduction and contribute to the design of more efficient iron-based catalysts for sustainable CO₂ conversion and water splitting in energy and environmental applications.
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GEOPHYSICAL RESEARCH LETTERS
·
2026
·Vol. 53
·期 14
·e2026GL122763
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IF 5
Yuanjing Li,Liangliang Zhang,Fabin Pan,Xiaojing Lai,Xiang Wu,Feng Zhu
Mercury is one of the few terrestrial planets in the solar system with a magnetic field, yet the energy source to power its core dynamo remains unclear to date. Si, C, and possibly H are the top candidate light elements for its liquid core. Here, we showed experimentally that Si, C, and H in Fe-Si-C and Fe-Si-C-H liquids share a simultaneous solubility at 9–21 GPa, 1,400°C–2,200°C, and this solubility decreases with decreasing temperature. When exceeding the simultaneous solubility, light elements will exsolve from the Fe melt as elemental phases such as diamond, graphite, silicon, and H 2 . We infer that if Mercury had an early liquid core primarily composed of saturated Fe-Si-C-(H) liquid, subsequent cooling would lead to continuous light element exsolution in its liquid core. The gravitational potential released by the exsolved light elements can drive the compositional convection and power its long-term core dynamo.
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ENERGY
·
2026
·
IF 10.1
Feiyang Xu,Jing Li,Zhen Zhu,Chuting Lai,Wenluo Li,Niansi Li,Bendong Yu
In hot and humid climates, establishing continuous and energy-efficient humidity control strategies is crucial for improving indoor environmental quality. However, most existing adsorption dehumidification systems are unable to operate continuously due to the necessary regeneration process of adsorbent materials. Therefore, this study proposes a solar-driven dual-channel ventilated Trombe wall system based on MOFs, which achieves 24-h continuous indoor dehumidification via alternating adsorption-desorption operations. MOFs/CF is employed as the adsorption bed. Two identical beds operate in an alternating manner, utilizing cold and hot water circulation to provide the driving force for the adsorption and regeneration processes, respectively. Cold water is supplied at 25 °C and hot water is provided by solar energy. The comprehensive performance of the system is evaluated through modular experimental testing and numerical simulations. Experimental results demonstrate that the MOFs/CF adsorption bed achieves a maximum adsorption capacity of 0.91 g/g. Elevating the desorption temperature enhances the regeneration performance; at a desorption temperature of 80 °C, the peak relative humidity difference between the inlet and outlet air reaches 12.8%. Furthermore, simulation results reveal that with a single adsorption bed featuring an effective area of 0.4 m 2 and an MOF loading of 0.96 kg, the system achieves its maximum dehumidification capacity under the 80 °C condition. In this scenario, the system completes approximately five cycles within 24 h and yields a total daily moisture removal of 4.54 kg. In addition, the system demonstrates superior overall performance under the 70 °C condition, where the thermal driving efficiency peaks at 87.22%.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Biyang Zhu,Abdul Mueed,Jiachen Liang,Lijun You
The radical-mediated degradation of polysaccharides is a promising route to modify their bioactivity, but the fundamental role of side-chain substituents in directing these reactions remains unclear. Therefore, this study systematically investigated the influence mechanisms of substituents on the monosaccharide degradation under UV/H₂O₂ treatment. Six glucose derivatives, including d -glucose, D-gluconic acid, methyl-D-glucopyranoside, D-glucal, D-glucosamine, and D-glucono-δ-lactone, were selected to represent typical electron-donating (-OCH₃, -NH₂), electron-withdrawing (-COOH, -C=O), and unsaturated double bond (C=C) groups. Degradation kinetic analysis revealed that electron-donating groups accelerated the radical degradation (k obs = 31.59 × 10 −3 min −1 for D-glucal), while electron-withdrawing groups decelerated it (k obs = 17.50 × 10 −3 min −1 for D-gluconic acid). The formation of carbonyl and carboxyl groups showed distinct accumulation patterns dependent on the substituent. Product profiling via high-performance anion exchange chromatography coupled with tandem electrospray mass spectrometry (HPAEC-ESI-MS/MS) demonstrated unique fragment patterns for each derivative, confirming substituent-directed reaction pathways. Quantum chemistry calculations further validated the proposed mechanisms, showing that electron-donating groups lowered the energy barriers for key steps such as hydrogen abstraction and peroxyl-radical cleavage. This work elucidates that the electronic properties of side-chain substituents determine the regioselectivity, kinetics, and product distribution in monosaccharide radical degradation. The findings provide a foundational mechanistic framework for predicting and controlling the degradation of complex functional polysaccharides.
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Materials Today Bio
·
2026
·
IF 11
Li Yang,Qianlei Ye,Xinran Peng,Jiayin Yu,Xueyi Xiao,Lei Wang,Yi Yan Yang,Peiyan Yuan,Guo-Bao Tian,Xin Ding
Rising antibiotic resistance and adverse effects on commensal gut microbiota severely compromise conventional antibiotic therapies for Helicobacter pylori infection. Sonodynamic therapy (SDT), which employs low-intensity ultrasound to activate sonosensitizers for localized generation of cytotoxic reactive oxygen species (ROS), presents a promising non-antibiotic alternative with minimal resistance development risk. However, the efficacy of SDT is inherently constrained by the short diffusion radius and lifetime of ROS. Herein, we developed a homologous-targeting biomimetic sonosensitizer platform to overcome this limitation: hybrid membrane nanovesicles (TNVs-DMVs) engineered from turmeric plant-derived exosome-like nanovesicles (TNVs) and H. pylori -derived double membrane vesicles (DMVs). TNVs contain sonosensitizer curcumin and improve its solubility, yet SDT efficacy against H. pylori is limited. The DMVs endow TNVs-DMVs with intrinsic homologous targeting capability towards H. pylori , significantly enhancing the intracellular delivery of curcumin and subsequent ROS generation within bacterial cells. As a result, TNVs-DMVs achieved potent eradication of H. pylori in both acidic and neutral conditions without inducing detectable resistance. Moreover, TNVs-DMVs exhibited superior mucus penetration compared to TNVs alone, enabling effective elimination of H. pylori and its biofilms residing within the protective gastric mucus layer. In an H. pylori -infected mouse model, TNVs-DMVs mediated SDT demonstrated efficacy surpassing free TNVs and comparable to standard triple antibiotic therapy. Importantly, unlike triple therapy which depletes commensal flora, TNVs-DMVs treatment not only preserves intestinal microbiota homeostasis but also significantly increases populations of beneficial bacteria. This rationally designed TNVs-DMVs platform represents a transformative therapeutic modality, offering resistance-free eradication of H. pylori while maintaining microbiome health, distinct from conventional antibiotics.
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Thermal Science and Engineering Progress
·
2026
·
IF 5.6
Xiaoru Huang,Shengmao Zhang,Chao Ju,Gaiqing Zhao,Qin Zhao,Xiaobo Wang
h-BN is modified via synergistic KH550 and Span 80. BNKS nanosheets sustain stable dispersion in ester oil 1190 for 7 days. • BNKS nanofluids show less viscosity rise. BNKS-5 has 8.27% higher thermal conductivity (0.1693 W·m −1 ·K −1 , 20 ℃) vs ester oil. • BNKS-5 nanofluid lowers battery module maximum temperature difference to 4.80 °C at 4 L/min. Immersion cooling technology enables efficient heat dissipation through direct heat exchange between coolants and components. Ester oils are considered potential cooling media owing to their biodegradability and excellent thermal stability; however, their low thermal conductivity limits further improvement in cooling performance. Thus, this study proposed and implemented a synergistic mechanism combining chemical bonding and physical adsorption through the surface modification of h-BN with KH550 and Span 80. Nanofluids were prepared using ester oil 1190 as the base fluid, and their dispersion stability, rheological properties, and thermal conductivity were evaluated. Numerical simulations were further conducted to assess the cooling performance of the BNKS nanofluid in an immersion cooling system. The results demonstrated that the modified BNKS nanosheets exhibited improved short-term dispersion stability in ester oil 1190 compared with h-BN, maintaining stable dispersion after 7 days of static sedimentation. Moreover, surface modification reduced the viscosity increase of high-concentration nanofluids. At 20 °C, the BNKS-5 nanofluid achieved a thermal conductivity of 0.1693 W·m −1 ·K −1 , corresponding to an 8.27% enhancement compared with ester oil 1190. At a flow rate of 4 L/min, the BNKS-5 nanofluid decreased the maximum temperature difference of the battery module to 4.80 °C and maintained an average temperature of 26.78 °C, indicating enhanced temperature uniformity and cooling performance. This study proposed a synergistic surface modification strategy that integrated KH550-induced chemical bonding with the physical adsorption of Span 80 to improve the dispersion stability and thermal transport properties of ester oil-based h-BN nanofluids, highlighting their potential for immersion cooling applications.
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RARE METALS
·
2025
·
IF 11
Chen Taoran,Qin Tian,Sun Hongli,Su Chenliang
Photocatalytic oxidation of toluene to valuable benzaldehyde offers a promising pathway for sustainable production of fine chemicals and pharmaceuticals. In this process, photogenerated holes play a crucial role in C(sp 3 )-H bond dissociation. However, the photocatalytic performance of current photocatalysts is often hindered by the low separation and transfer efficiency of photogenerated charges. In this work, we presented a perovskite-based heterostructure via in situ growth of defective WO 3- x nanosheets on Cs 2 AgBiBr 6 nanoparticles for photocatalytic toluene transformation. In situ Fourier transform infrared spectroscopy tests proved the introduction of oxygen-deficient WO 3- x component enhanced the chemisorption of molecular oxygen. The in situ electron paramagnetic resonance and 4-chloro-7-nitro-1,2,3-benzoxadiazole fluorescence measurements further confirmed the presence of oxygen vacancies, and the formation of heterostructure synergistically accelerated the formation of the superoxide radicals and the transfer of photogenerated charge carriers. Under visible light irradiation, Cs 2 AgBiBr 6 /WO 3- x photocatalyst could effectively oxidize toluene toward benzaldehyde with a conversion rate of 9020 μmol g −1 h −1 , which was a 3.5-fold increase over that of the unmodified Cs 2 AgBiBr 6 . Graphical abstract
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Leiting Kuai,Xuan Meng,Naiwang Liu,Li Shi
This study aims to elucidate the reaction mechanism of naphthalene alkylation with long-chain α-tetradecene (α-C14H28) over H-FAU zeolite, a reaction critical for producing high-value alkylated aromatics in industrial catalysis. By combining in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) with kinetic and thermodynamic analysis, this study quantitatively tracks the evolution of four key carbocation intermediates formed on distinct Brønsted acid sites and identifies the Wheland-intermediate-forming step as rate-determining. For the first time, adsorption and diffusion analysis, reaction kinetics, and comprehensive catalyst characterization (XRD, NH3-TPD, pyridine-IR) are integrated to establish a complete mechanistic pathway. The results reveal how pore confinement and acid-site distribution govern intermediate evolution and overall activity, thereby offering a validated model for the rational design of selective and stable zeolite catalysts for continuous alkylation processes.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2011
·
IF 2.13
Xin Tian,Zhengping Dong,Yifan Huang,Jiantai Ma
In this work, molecular logic element modified multifunctional silica nanoparticles having high magnetization have been successfully prepared. These multifunctional nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), Elementary analysis, X-ray powder diffraction (XRD) and Vibrating sample magnetometer (VSM). The characterization datum indicated that the organic ligand was successfully grafted on the surface of the magnetic silica nanoparticles . The fluorescent changes of the hybrid material upon the addition of cations (H + , F − and their mixture) is utilized as an INHIBIT logic gate at the molecular level, using the fluorescence intensity signal as output.
研究领域:
纳米医学
·
生物传感器
·
分子诊断
·
化学生物学
·
智能材料
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危险品化学品经营许可证（带存储）