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关键词： ACOF-1   CO2/CH4 separation   Diffusivity-controlled   MMMs   Pebax  

摘要： Membrane-based separation is a promising technology for CO₂ capture and gas purification due to its energy efficiency and scalability. Among these, mixed matrix membranes (MMMs) have garnered significant attention for surpassing the performance limits of neat polymers. This study investigates the mechanistic influence of azine-linked covalent organic framework (ACOF-1) incorporation on the gas transport behavior of Pebax-based mixed matrix membranes (MMMs) for CO₂/CH₄ separation. Pebax–ACOF-1 MMMs with varied filler loadings (2–10 wt%) were synthesized via solution casting and characterized using XRD, FTIR, SEM, TEM, and tensile testing. Structural and morphological analyses confirmed good compatibility and strong interfacial adhesion between ACOF-1 and the polymer matrix, minimizing the formation of non-selective voids. Mixed-gas permeation experiments were conducted at 1 bar and temperatures ranging from 24 to 70 °C. Results revealed that the addition of ACOF-1 significantly improved both CO₂ permeability and CO₂/CH₄ selectivity compared to pure Pebax. The optimal membrane, containing 5 wt% ACOF-1, exhibits a CO₂ permeability of 227.2 Barrer and a CO₂/CH₄ selectivity of 16.9 at 70 °C, about a three-fold improvement over the neat Pebax membrane. Time-lag measurements confirmed that the performance enhancement arises primarily from diffusivity gains rather than solubility changes due to formation of a Pebax/ACOF-1 interfacial region with enhanced diffusivity for CO₂ and CH₄. Excessive filler loading (10 wt%) led to aggregation, reducing both permeability and selectivity. These results establish a direct relationship between filler loading, free-volume modification, and diffusivity-controlled CO₂ transport, offering mechanistic insight critical for designing next-generation COF-based MMMs for gas separation.

关键词： All valuable metals recovery   Hydrometallurgy   NCM cathode   Selective separation   Spent lithium-ion battery recovery  

摘要： The lithium-ion batteries present considerable challenges in the efficient all-metal recovery, which is essential for alleviating Li, Ni, Co, and Mn resource shortages as well as reducing environmental footprint. However, the transition metals in spent LiNi_xCo_yMn_1-x-yO₂ (NCM) cathodes have similar chemical properties, which present a crucial challenge for highly selective separation via traditional leaching methods. Herein, a novel stepwise leaching strategy is proposed to effectively separate all valuable metals with environmentally friendly leaching agents based on the synergistic mechanism of “reduction-oxidation-complexation”. The strategy consists of an oxalic acid leaching process, a sodium persulfate leaching process, and an ammonia leaching process. To begin with, oxalic acid selectively leaches Li and reduces transition metals, creating a suitable redox state for Ni leaching. Subsequently, sodium persulfate selectively oxidizes Co and Mn, thereby achieving the selective separation of Ni. Moreover, Co and Mn are effectively separated due to the difference in their complexation strength with ammonia. Each process facilitates the next separation process by establishing conducive reaction conditions. On this basis, all metal elements in spent NCM cathodes are selectively separated and recovered under the sequence of “Li-Ni-Co-Mn”. The leaching efficiencies of Li, Ni, and Co reach 95.5%, 93.6%, and 93.2%, respectively, while Mn is recovered as MnCO₃.Meanwhile, the strategy yields a profit of $1319 per ton spent lithium-ion batteries recovered. This work not only overcomes the challenge of selective separation and recovery for all valuable metals but also provides a sustainable pathway for the recycling of spent lithium-ion batteries.

关键词： 1 T-NiTe2   1 T-CoTe2   Transition metal tellurides   Binder-free electrode   Capacitive deionization  

摘要： Capacitive deionization (CDI) is an energy-efficient technology for desalination, yet its performance is limited the trade-off between electrical conductivity and ion-adsorption activity in electrode materials. Herein, introduce a bimetallic telluride heterostructure design into the CDI field and construct a binder-free 1 T-phase NiTe2/CoTe2 electrode on nickel foam for efficient Cl-capture. In this architecture, the 1 T-NiTe2 backbone functions as a Type-II Dirac semimetal framework to ensure efficient electron transport, while the electronically modulated 1 T-CoTe2 serves as the active center with an optimized d-band center for enhanced Faradaic Cl-capture. Consequently, the optimized electrode exhibits a high salt adsorption capacity of 78.48 mg g-1 and salt removal rate of 1.32 mg g-1 min-1 at 1.2 V. Furthermore, the structural integrity enables excellent cycling stability with 90.3% capacity retention after 100 cycles. This study provides new insights into the rational design of metal telluride-based electrodes and opens a promising avenue for their application in next-generation CDI technologies.

摘要： Capacitive deionization (CDI) is an energy-efficient technology for desalination, yet its performance is limited by the trade-off between electrical conductivity and ion-adsorption activity in electrode materials. Herein, we introduce a bimetallic telluride heterostructure design into the CDI field and construct a binder-free 1 T-phase NiTe₂/CoTe₂ electrode on nickel foam for efficient Cl⁻ capture. In this architecture, the 1 T-NiTe₂ backbone functions as a Type-II Dirac semimetal framework to ensure efficient electron transport, while the electronically modulated 1 T-CoTe₂ serves as the active center with an optimized d-band center for enhanced Faradaic Cl⁻ capture. Consequently, the optimized electrode exhibits a high salt adsorption capacity of 78.48 mg g⁻¹ and a salt removal rate of 1.32 mg g⁻¹ min⁻¹ at 1.2 V. Furthermore, the structural integrity enables excellent cycling stability with 90.3% capacity retention after 100 cycles. This study provides new insights into the rational design of metal telluride-based electrodes and opens a promising avenue for their application in next-generation CDI technologies.

摘要： Soft rot caused by Pectobacterium carotovorum subsp. carotovorum (Pcc) leads to severe postharvest losses in chili pepper, highlighting an urgent need for novel preservation techniques. Due to the Gram-negative nature of Pcc, common bacteriocins like nisin are ineffective. Here, we engineered a novel bacteriocin, paracin wx7-1, which exhibited enhanced activity against the pathogen Pcc with a minimum inhibitory concentration (MIC) of 16 μM, 8-fold lower than that of its template. Paracin wx7-1 exerted concentration-dependent bactericidal effects, achieving >99.9% lethality at ≥8MIC. In vivo, 8MIC paracin wx7-1 treatment reduced disease incidence from 65% to 15% on the first day and 100% to 68.33% on the fourth day, compared to the control. Additionally, a 24-hour pre-incubation of paracin wx7-1 elicited a better resistance response in pepper. SEM revealed reduced bacterial colonization on pepper surface and damage to the Pcc cell membrane. Physiological assays confirmed that paracin wx7-1 disrupted membrane integrity, depolarized membrane potential, increased inner/outer membrane permeability of Pcc. RNA-seq and RT-qPCR analysis of Pcc revealed that paracin wx7-1 exerted its antibacterial effect by coordinately downregulating genes essential for core metabolic processes (carbohydrate and amino acid metabolism) and structural integrity (ribosome, cell wall/membrane), thereby compromising bacterial viability and pathogenicity. RNA-seq and RT-qPCR analysis of green pepper revealed that paracin wx7-1 induced systemic resistance by reprogramming defense-related metabolism, MAPK signaling, and plant-pathogen interaction components. This study presents a promising bacteriocin with dual action, direct pathogen inhibition and host resistance induction, for controlling pepper soft rot.

关键词： Catalysts   film capacitor   poly (4-methyl-1-pentene)   polypropylene  

摘要： Under the trend of high-temperature development in power electronic devices, polymer-based film materials for commercial capacitors face a core bottleneck: when the operating temperature exceeds 85 degrees C, their performance degrades significantly, limiting their application under working conditions. Poly(4-methyl-pentene) (PMP), which has a dielectric constant similar to that of commercial capacitor base film materials, also boasts a high melting point (236 degrees C) and superior dielectric loss (less than 0.0001 at 1 MHz), showing great potential to break through the technical barriers of high-temperature capacitors. Despite its significant advantages in basic performance, PMP is constrained by ultra-thin film formation technology ( <10 mu m), high oxygen permeability, and complex synthesis processes, leading to delayed practical applications. This paper systematically reviews the synthesis techniques, crystal structure, dielectric properties, and application progress of PMP materials in capacitors. By integrating research on synthesis, structure, performance, and application, this study aims to provide theoretical support for material design, process optimization, and performance enhancement of PMP-based high-temperature capacitors, promoting their practical use in harsh environments.

关键词： Alpinia oxyphylla Miq   NF-κB/IκBα signaling pathway   TGF-β1/Smad signaling pathway   Zingiberaceae   anti-renal fibrosis activity   sesquiterpenoids  

摘要： Thirteen previously undescribed and structurally diverse sesquiterpenoids—comprising seven cadinane-type (1a, 1b, 2a, 2b, 3a, 3b, and 4), two eremophilane-type (8a and 8b), two eudesmane-type (9 and 10), one tricyclic (12), one guaiane-type (13), along with eight known analogues (5–7, 11, and 14–17) were isolated from the fruits of Alpinia oxyphylla. The structures of the thirteen sesquiterpenoids, including their relative and absolute configurations, were determined through their NMR, HRESIMS, and ECD spectroscopic data. Eight compounds (1b, 2a, 3a, 3b, 5, 8a, 8b, and 11) were found to have significant anti-renal fibrosis activity by inhibiting the expression of extracellular matrix components (Fibronectin and Collagen I) and α-SMA in TGF-β1 induced NRK-52e cells. Compounds 1b and 8b displayed significant inhibitory activity towards three markers of renal fibrosis in a dose-dependent manner in three types of TGF-β1 induced kidney cells (NRK-52e, NRK 49f, and HCK-8). RNA-seq analysis and target protein validation displayed that the anti-renal fibrosis activity of 1b was related to modulation of the NF-κB P65/IκBα signaling pathway, and simultaneously showed relative correlation to the inhibition of Smad3 phosphorylation. These results suggested that NF-κB P65/IκBα and TGF-β1/Smad3 signaling pathways were collectively mediated for the biological activity of 1b, revealin

摘要： The etiology of type 1 diabetes (T1DM) is not fully understood, but a complex interplay of genetic and environmental factors is involved. Exposure to ambient air pollution during pregnancy has been suggested as a risk factor of T1DM. This study aimed to examine whether accumulated prenatal exposure to ambient air pollution is associated with increased risk of T1DM in offspring.

关键词： Cs2AgBiI6   CsGeI3   CsSnxGe1-xI3   Extended spectral coverage   Optoelectronic conversion efficiency (OPCE)   Quantum dot   SW-CNT tri absorber stack  

摘要：

• •
  The work proposes a hybrid Quantum dot -based perovskite photovoltaic cell (QD-PPVC) architecture using a graded tri-absorber stack made up of CsGeI₃ (Eg = 1.363 eV), CsSn_0.5Ge_0.5I₃ (Eg = 1.5 eV), and Cs₂AgBiI₆ (Eg = 1.6 eV).
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  The work also introduces a single-walled carbon nanotube (SW-CNT) interlayer between absorber and ETL to enhance charge extraction and suppress recombination losses.
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  The optimized device configuration: Cu₂O/CsGeI₃/CsSn_0.5Ge_0.5I₃/Cs₂AgBiI₆/SW-CNT/SnS₂/FTO achieved superior photovoltaic performance: OPCE of 31.01%, J_sc of 33.51 mA/cm², V_oc of 1.35 V and Fill Factor of 85.67%.
• •
  The proposed architecture outperforms comparison architectures: Dual-absorber QD-PPVC of 28.58%, Single CsGeI₃ absorber configuration of 25.15%, Single CsSn_0.5Ge_0.5I₃ absorber configuration of 23.28%, and Single Cs₂AgBiI₆ absorber configuration of 19.86%.
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  The proposed model demonstrates extended spectral responsivity up to 1100 nm with ∼90% quantum efficiency, exc

关键词： Rietveld refinement  

摘要： Tellurium (VI) substituted Mo/W-based Sr₂Co_1+δMo_0.5−δW_0.5O_6−δ double perovskites (DP) containing a significant scheelite SrMoO₄ intrinsic phase (SCMWO, SCM_TeWO and SCMW_TeO) was achieved via a triple-sintering solid-state reaction route. Rietveld refinement confirms a predominantly ordered tetragonal double-perovskite structure (space group I4/m) coexisting with ∼20–25 wt% SrMoO₄, establishing the composite nature of the materials. Te (VI) substitution at the B′ site preserves global symmetry while inducing lattice distortion, octahedral tilting, and redistribution of oxygen vacancies, thereby modulating antisite disorder. XPS analysis confirms mixed Co²⁺/Co³⁺ states along with reduced defect concentration upon Te substitution. Optical studies reveal narrow direct band gaps (1.43–1.69 eV), with systematic widening and reduced Urbach energy upon Te incorporation. It indicates suppression of defect-induced band-tail states due to the contribution of the SrMoO4 secondary phase. Magnetic measurements show Curie–Weiss-type paramagnetism with dominant antiferromagnetic interactions. However, the pristine sample exhibits enhanced effective moment due to disorder and spin–orbit coupling effects, while Te substitution reduces magnetic inhomogeneity. Dielectric and impedance analyses demonstrate Maxwell–Wagner-type interfacial polarization arising from grain, grain-boundary, and phase-interface contributions. Thermally activated hopping conduction and non-Debye relaxation behavior occurs with the temperature variation. The SrMoO₄ phase plays a crucial role in governing interfacial polarization and electrical heterogeneity. This study provides an effective route to tune structural disorder, magnetic interactions, optical absorption, and dielectric response in Mo/W-based double-perovskite systems upon B′-site Te substitution, in conjunction with com